List of Publications

@article{Kuttner2024,

title = {Mit Physik die Welt verstehen und verändern (Understanding and shaping the world with physics)},

author = {Christian Kuttner and Adam Kubec},

url = {https://christiankuttner.de/wp-content/uploads/2024/04/2024-Mit-Physik-die-Welt-verstehen-und-gestalten.pdf, German version

https://christiankuttner.de/wp-content/uploads/2024/03/WE-Heraeus-Forum-english.pdf, English version},

year  = {2024},

date = {2024-04-02},

urldate = {2024-04-01},

journal = {Physik Journal},

volume = {23},

issue = {4},

pages = {51},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{nokey,

title = {Ein lebendiges Netzwerk (A vibrant network)},

author = {Christian Kuttner and Adam Kubec},

url = {https://christiankuttner.de/wp-content/uploads/2024/03/2024-Ein-lebendiges-Netzwerk.pdf



https://christiankuttner.de/wp-content/uploads/2024/02/A-vibrant-network.pdf},

year  = {2024},

date = {2024-02-26},

urldate = {2024-02-26},

journal = {Physik Journal},

volume = {23},

issue = {3},

pages = {76-77},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{nokey,

title = {Nanoalloy catalysis and magnetic and optical properties: general discussion},

author = {Christine M. Aikens and Hakim Amara and Vincenzo Amendola and 

Francesca Baletto and Stephan Barcikowski and Noelia Barrabés and Valérie Caps and Fuyi Chen and Daojian Cheng and Vana Chinnappa Chinnabathini and 

Emmanuel Cottancin and Isaac Daniel and Kobe De Knijf and Alessandro Fortunelli and Didier Grandjean and Graham J. Hutchings and Ewald Janssens and 

Robert M. Jones and Christian Kuttner and Alexander Large and Éric Marceau and Marcelo M. Mariscal and Pinkie Ntola and Jonathan Quinson and Mzamo Shozim and Swathi Swaminathan and Mona Treguer-Delapierre and Lichang Wang and Hans-Christian Weissker and Miguel José Yacaman and Yufei Zhang},

url = {https://christiankuttner.de/wp-content/uploads/2022/12/d2fd90088b.pdf},

doi = {10.1039/D2FD90088B},

year  = {2023},

date = {2023-01-01},

urldate = {2022-12-23},

journal = {Faraday Discussions},

volume = {242},

pages = {522-541},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{nokey,

title = {Nanoalloy magnetic and optical properties, applications and structures: general discussion},

author = {Christine M. Aikens and Damien Alloyeau and Vincenzo Amendola and Catherine Amiens and Pascal Andreazza and Joost M. Bakker and Francesca Baletto and Stephan Barcikowski and Noelia Barrabés and Michael Bowker and Fuyi Chen and Isaac Daniel and Wolfgang E. Ernst and Riccardo Ferrando and Piero Ferrari and Alessandro Fortunelli and Didier Grandjean and Hazar Guesmi and Graham J. Hutchings and 

Ewald Janssens and Robert M. Jones and Christian Kuttner and Maria J. Lopez and Éric Marceau and Marcelo M. Mariscal and John McGrady and Christine Mottet and Jaysen Nelayah and Cameron Owen and Micha Polak and Jonathan Quinson and Cesare Roncaglia and Rolf Schäfer and Rasmus Svensson and Mona Treguer-Delapierre and Miguel José Yacaman and Yufei Zhang},

url = {https://christiankuttner.de/wp-content/uploads/2022/12/d2fd90087d.pdf},

doi = {10.1039/D2FD90087D},

year  = {2023},

date = {2023-01-01},

urldate = {2022-12-23},

journal = {Faraday Discussions},

volume = {242},

pages = {389-417},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{nokey,

title = {Nanoalloy structures and catalysis part 1: general discussion},

author = {Damien Alloyeau and Vincenzo Amendola and Catherine Amiens and Pascal Andreazza and Joost M. Bakker and Francesca Baletto and Stephan Barcikowski and Noelia Barrabés and Michael Bowker and Fuyi Chen and Emmanuel Cottancin and Wolfgang E. Ernst and Riccardo Ferrando and Georg Daniel Förster and Alessandro Fortunelli and Didier Grandjean and Hazar Guesmi and Graham J. Hutchings and Ewald Janssens and Miguel José Yacaman and Christian Kuttner and Lebohang Macheli and Éric Marceau and Marcelo M. Mariscal and Jette Mathiesen and John McGrady and Christine Mottet and Diana Nelli and Pinkie Ntola and Cameron Owen and Micha Polak and Jonathan Quinson and Cesare Roncaglia and Leonid Rubinovich and Rolf Schäfer and Manoj Settem and Jeff Shield and Mzamo Shozim and Swathi Swaminathan and Stefan Vajda and Hans-Christian Weissker

},

url = {https://christiankuttner.de/wp-content/uploads/2022/12/d2fd90085h.pdf},

doi = {10.1039/D2FD90085H},

year  = {2023},

date = {2023-01-01},

urldate = {2022-12-23},

journal = {Faraday Discussions},

volume = {242},

pages = {106-128},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{nokey,

title = {Nanoalloy structures and catalysis part 2: general discussion},

author = {Christine Aikens and Damien Alloyeau and Hakim Amara and Vincenzo Amendola and Catherine Amiens and Pascale Andreazza and Francesca Baletto and Stephan Barcikowski and Michael Bowker and Florent Calvo and Fuyi Chen and Emmanuel Cottancin and Wolfgang E. Ernst and Riccardo Farris and Riccardo Ferrando and Georg Daniel Förster and Alessandro Fortunelli and Alexis Front and Didier Grandjean and Hazar Guesmi and Graham J. Hutchings and Ewald Janssens and Miguel José Yacaman and Christian Kuttner and Éric Marceau and Marcelo M. Mariscal and Jette Mathiesen and John McGrady and Trang Nguyen and Pinkie Ntola and Cameron Owen and Charlie Paris and Micha Polak and Rasmus Svensson and Swathi Swaminathan and Mona Treguer-Delapierre and Jonathan Quinson and Yufei Zhang},

url = {https://christiankuttner.de/wp-content/uploads/2022/12/d2fd90086f.pdf},

doi = {10.1039/d2fd90086f},

year  = {2023},

date = {2023-01-01},

urldate = {2022-12-22},

journal = {Faraday Discussions},

volume = {242},

pages = {212-230},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{nokey,

title = {Escaping the local catalytic activity space},

author = {Christian Kuttner*},

url = {https://rdcu.be/cVS5D},

doi = {10.1038/s43588-022-00326-w},

year  = {2022},

date = {2022-09-19},

urldate = {2022-09-19},

journal = {Nature Computational Science},

volume = {2},

number = {557},

note = {Invited Research Highlight},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{nokey,

title = {Understanding Crystal Nucleation Mechanisms: Where Do We Stand? General Discussion},

author = {Michael W. Anderson and Matthew Bennett and Ruel Cedeno and Helmut Cölfen and Stephen Cox and Aurora J. Cruz-Cabeza and James J. De Yoreo and Rik Drummond-Brydson and Marta Dudek and Kristen A. Fichthorn and 

Aaron R. Finney and Ian Ford and Johanna Galloway and Denis Gebauer and 

Romain Grossier and John H. Harding and Alan Hare and Dezsö Horváth and 

Liam Hunter and Joonsoo Kim and Yuki Kimura and Christine E. A. Kirschhock and Alexei A. Kiselev and Weronika Kras and Christian Kuttner and Alfred Lee and 

Zhiyu Liao and Lucia Maini and Sten Nilsson Lill and Nick Pellens and Sarah L. Price and Ivo Rietveld and Jeffrey D. Rimer and Kevin J. Roberts and Jutta Rogal and 

Matteo Salvalaglio and Ilaria Sandei and Gábor Schuszter and Jan Sefcik and 

Wenhao Sun and Joop H. ter Horst and Marko Ukrainczyk and Alexander E. S. van Driessche and Stéphane Veesler and Peter G. Vekilov and Vivek Verma and Thomas Whale and Helen P. Wheatcroft and Jacek Zeglinski},

doi = {10.1039/d2fd90021a},

year  = {2022},

date = {2022-07-05},

urldate = {2022-07-05},

journal = {Faraday Discussions, DOI: 10.1039/d2fd90021a},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{nokey,

title = {Controlling Polymorphism: General Discussion},

author = {Ruel Cedeno and Aurora Cruz-Cabeza and Rik Drummond-Brydson and Marta Dudek and Katharina Edkins and Kristen Fichthorn and Aaron Finney and Ian Ford and Johanna Galloway and Romain Grossier and Joonsoo Kim and Christian Kuttner and Lucia Maini and Fiona Meldrum and Mark Miller and Peter Morris and Sten Nilsson Lill and Boaz Pokroy and Sarah Price and Ivo Rietveld and Je!rey Rimer and Kevin Roberts and Jutta Rogal and Matteo Salvalaglio and Jan Sefcik and Wenhao Sun and Stéphane Veesler and Peter Vekilov and Helen Wheatcroft and Michael Whittaker and Ran Zhao},

doi = {10.1039/d2fd90023h},

year  = {2022},

date = {2022-07-05},

urldate = {2022-07-05},

journal = {Faraday Discussions, DOI: 10.1039/d2fd90023h},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{nokey,

title = {Growing Crystals by Design: General Discussion},

author = {Michael Anderson and Matthew Bennett and Ruel Cedeno and Marta Dudek and Kristen Fichthorn and Aaron Finney and Ian Ford and Colin Freeman and Alan Hare and Connor Hewson and Adam Hill and Joonsoo Kim and Christine Kirschhock and Christian Kuttner and Fiona Meldrum and Sten Nilsson Lill and Rachel Pooley and Ivo Rietveld and Jeffrey Rimer and Kevin Roberts and Jutta Rogal and Matteo Salvalaglio and Jan Sefcik and Wenhao Sun and Damien Thompson and Jincheng Tong and Mollie Trueman and Peter Vekilov},

doi = {10.1039/d2fd90022j},

year  = {2022},

date = {2022-07-04},

urldate = {2022-07-04},

journal = {Faraday Discussions, DOI: 10.1039/d2fd90022j},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{nokey,

title = {Learning Lessons from Nature – the Future of Biomimetics: General Discussion},

author = {Michael Anderson and Matthew Bennett and Ruel Cedeno and Ian Ford and Takeshi Fukuma and Christian Kuttner and Lucia Maini and Fiona Meldrum and Sten Nilsson Lill and Fabio Nudelman and Ivo Rietveld and Kevin Roberts and Jan Sefcik and Wenhao Sun and Peter Vekilov and Ran Zhao},

url = {https://christiankuttner.de/wp-content/uploads/2022/07/Anderson-2022-Faraday-Discuss.pdf},

doi = {10.1039/d2fd90024f},

year  = {2022},

date = {2022-06-30},

urldate = {2022-06-30},

journal = {Faraday Discussions, DOI: 10.1039/d2fd90024f},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{nokey,

title = {Plasmonic Gradient Arrays for Rapid Screening of Surface-Enhanced Raman Scattering Efficiency: Particle Libraries of Gold Nanostars},

author = {Christian Kuttner* and Valentina Piotto and Luis M. Liz-Marzán*},

url = {https://christiankuttner.de/wp-content/uploads/2021/11/Chem-Mater-2021-Kuttner.pdf},

doi = {10.1021/acs.chemmater.1c03223},

year  = {2021},

date = {2021-11-02},

urldate = {2021-11-02},

journal = {Chemistry of Materials},

volume = {33},

number = {22},

pages = {8854-8862},

abstract = {The efficiency of signal enhancement for surface-enhanced Raman scattering (SERS) spectroscopy is a crucial parameter for the design and development of nanoparticle-based sensing applications. However, screening SERS capabilities of anisotropic nanoparticles by iterative synthesis is time consuming and their prediction still suffers from the complex nonlinear relationships of morphological and electromagnetic properties. We present an approach to use a macroscopic gradient array of substrate-supported nanoparticles for rapid screening of their SERS efficiencies. The gradient represents a "plasmonic library" of colloids synthesized by two-step post-modification of a monolayer of randomly close-packed gold nanospheres covered with poly(N-isopropylacrylamide) shells. A first chemical overgrowth process yields a continuous gradient of seed particles, with diameters ranging between 10 and 60 nm. Subsequently, the seeds are further grown into nanostars with spiky tips, which improve their SERS enhancing capabilities. Raman mapping along the gradient provides rapid and reliable quantification of the specific SERS efficiencies for the whole library, as well as correlation to their optical and structural properties. By ensuring that the number and density of particles in the Raman excitation volume remain constant, the most appropriate synthetic conditions for efficient SERS can be readily identified on a single screening. As a proof of application, we screened the SERS performance of a library of nanostars and applied the selected best candidates for the detection of the biomarker pyocyanin of Pseudomonas aeruginosa. This bacterial quorum sensing (QS) signaling molecule was quantitatively detected within a linear dynamic range between 10^{-7} and 10^{-5} M, suitable for clinical applications.},

note = {* Corresponding author.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Charconnet:2020ut,

title = {Mechanically Tunable Lattice-Plasmon Resonances by Templated Self-Assembled Superlattices for Multi-Wavelength Surface-Enhanced Raman Spectroscopy},

author = {Mathias Charconnet° and Christian Kuttner°* and Javier Plou and Juan Luis García-Pomar and Agustín Mihi and Luis M Liz-Marzán* and Andreas Seifert*},

editor = {Muxian Shen},

url = {https://christiankuttner.de/wp-content/uploads/2021/09/Small-Methods-2021-Charconnet.pdf},

doi = {10.1002/smtd.202100453},

year  = {2021},

date = {2021-07-07},

urldate = {2021-07-07},

journal = {Small Methods},

volume = {5},

number = {10},

pages = {2100453},

abstract = {Lattice plasmons, i.e., diffractively coupled localized surface plasmon resonances, occur in long-range ordered plasmonic nanostructures such as 1D and 2D periodic lattices. Such far-field coupled resonances can be employed for ultrasensitive surface-enhanced Raman spectroscopy (SERS), provided they are spectrally matched to the excitation wavelength. The spectral positions of lattice plasmon modes critically depend on the lattice period and uniformity, owing to their pronounced sensitivity to structural disorder. We report the fabrication of superlattices by templated self-assembly of gold nanoparticles on a flexible support, with tunable lattice-plasmon resonances by means of macroscopic strain. We demonstrate that the highest SERS performance is achieved by matching the lattice plasmon mode to the excitation wavelength, by post-assembly fine-tuning of long-range structural parameters. Both asymmetric and symmetric lattice deformations can be used to adapt a single lattice structure to both red-shifted and blue-shifted excitation lines, as exemplified by lattice expansion and contraction, respectively. This proof-of-principle study represents a basis for alternative designs of adaptive functional nanostructures with mechanically tunable lattice resonances using strain as a macroscopic control parameter.},

note = {° Contributed equally. * Corresponding author. Selected for Hot Topic in Chemistry and Materials: Surfaces and Interfaces. Selected as Cover for the October Issue.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Allum:2021cr,

title = {Ultrafast X-Ray Science: General Discussion},

author = {Felix Allum and Francesca Calegari and Stefano M Cavaletto and Martin Centurion and Gopal Dixit and Elke Fasshauer and Ingo Fischer and Ruaridh Forbes and Gilbert Grell and Misha Ivanov and Adam Kirrander and Oleg Kornilov and Jochen Küpper and Christian Kuttner and Jonathan Marangos and Spiridoula Matsika and Andrew Maxwell and Russell S Minns and Andrés Moreno Carrascosa and Adi Natan and Daniel Neumark and Asami Odate and Andrea Oyarzún and Alicia Palacios and Thomas Pfeifer and Anja Röder and Jan M Rost and Arnaud Rouzée and Albert Stolow and Evgenii Titov and Peter M Weber and Thomas Wolf},

url = {https://christiankuttner.de/wp-content/uploads/2021/05/Faraday-Discussions-2021-Allum-2.pdf},

doi = {10.1039/d1fd90026a},

issn = {1359-6640},

year  = {2021},

date = {2021-05-14},

journal = {Faraday Discussions},

volume = {228},

pages = {597 -- 621},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Acheson:2021kg,

title = {Strong-Field Physics: General Discussion},

author = {Kyle Acheson and Felix Allum and Rituparna Das and Gopal Dixit and Huan Doan and Elke Fasshauer and Lingfeng Ge and Gilbert Grell and Misha Ivanov and Oleg Kornilov and Jochen Küpper and Christian Kuttner and Fernando Martín and Andrew Maxwell and Nicola Mayer and Alicia Palacios and Stephen Pratt and Anja Röder and Nina Rohringer and Arnaud Rouzée and Toshinori Suzuki and Evgenii Titov and Jean Christophe Tremblay and Haiwang Yong and Linda Young},

url = {https://christiankuttner.de/wp-content/uploads/2021/05/Faraday-Discussions-2021-Acheson.pdf},

doi = {10.1039/d1fd90025k},

issn = {1359-6640},

year  = {2021},

date = {2021-05-13},

journal = {Faraday Discussions},

volume = {228},

pages = {470 -- 487},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Ashfold:2021dv,

title = {Time-Resolved Ultrafast Spectroscopy: General Discussion},

author = {Michael Ashfold and Majed Chergui and Ingo Fischer and Lingfeng Ge and Gilbert Grell and Misha Ivanov and Adam Kirrander and Oleg Kornilov and Sivarama R Krishnan and Jochen Küpper and Christian Kuttner and Varun Makhija and Fernando Martín and Spiridoula Matsika and Russell S Minns and Adi Natan and Daniel M Neumark and Alicia Palacios and Stephen Pratt and Anja Röder and Jan M Rost and Marco Ruberti and Albert Stolow and Evgenii Titov and Linda Young},

url = {https://christiankuttner.de/wp-content/uploads/2021/05/Faraday-Discussions-2021-Ashfold.pdf},

doi = {10.1039/d1fd90024b},

issn = {1359-6640},

year  = {2021},

date = {2021-05-12},

journal = {Faraday Discussions},

volume = {228},

pages = {329 -- 348},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Allum:2021bb,

title = {Time-Resolved Diffraction: General Discussion},

author = {Felix Allum and Kasra Amini and Michael Ashfold and Dipanshu Bansal and Raphael J F Berger and Martin Centurion and Gopal Dixit and Daniel Durham and Elke Fasshauer and Joao Pedro Figueira Nunes and Ingo Fischer and Gilbert Grell and Mikhail Ivanov and Adam Kirrander and Oleg Kornilov and Christian Kuttner and Kenneth Lopata and Lingyu Ma and Varun Makhija and Andrew Maxwell and Andrés Moreno Carrascosa and Adi Natan and Daniel Neumark and Stephen Pratt and Anja Röder and Daniel Rolles and Jan M Rost and Taro Sekikawa and Mats Simmermacher and Albert Stolow and Evgenii Titov and Jean Christophe Tremblay and Peter M Weber and Haiwang Yong and Linda Young},

url = {https://christiankuttner.de/wp-content/uploads/2021/05/Faraday-Discussions-2021-Allum-1.pdf},

doi = {10.1039/d1fd90023d},

issn = {1359-6640},

year  = {2021},

date = {2021-05-11},

journal = {Faraday Discussions},

volume = {228},

pages = {161 -- 190},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{RibeirodeBarros:2020tz,

title = {Mechanistic Insights into the Light-Driven Catalysis of an Immobilized Lipase on Plasmonic Nanomaterials},

author = {Heloise Ribeiro de Barros and Isabel García and Christian Kuttner and Nicoll Zeballos and Pedro H C Camargo and Susana Inés Córdoba de Torresi and Fernando López-Gallego and Luis M Liz-Marzán},

url = {https://christiankuttner.de/wp-content/uploads/2021/01/ACS-Catal.-2020-de-Barros.pdf},

doi = {10.1021/acscatal.0c04919},

year  = {2021},

date = {2021-01-01},

journal = {ACS Catalysis},

volume = {11},

number = {1},

pages = {414--423},

abstract = {The use of light as an external stimulus to control the enzyme activity is an emerging strategy that enables accurate, remote, and noninvasive biotransformations. In this context, immobilization of enzymes on plasmonic nanoparticles offers an opportunity to create light-responsive biocatalytic materials. Nevertheless, a fundamental and mechanistic understanding of the effects of localized surface plasmon resonance (LSPR) excitation on enzyme regulation remains elusive. We herein investigate the plasmonic effects on biocatalysis using Au nanospheres (AuNSp) and nanostars (AuNSt) as model plasmonic nanoparticles, lipase from Candida antarctica fraction B (CALB) as a proof-of-concept enzyme, and 808 nm as near-infrared light excitation. Our data show that LSPR excitation enables an enhancement of 58% in the enzyme activity for CALB adsorbed on AuNSt, compared with the dark conditions. This work shows how photothermal heating over the LSPR excitation enhances the CALB activity through favoring product release in the last step of the enzyme mechanism. We propose that the results reported herein shed important mechanistic and kinetic insights into the field of plasmonic biocatalysis and may inspire the rational development of plasmonic nanomaterial–enzyme hybrids with tailored activities under external light irradiation.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Holler:2020wq,

title = {Biomacromolecular-Assembled Nanoclusters: Key Aspects for Robust Colloidal SERS Sensing},

author = {Roland P M Höller and Izabella J Jahn and Dana Cialla-May and Munish Chanana and Jürgen Popp and Andreas Fery and Christian Kuttner*},

url = {https://christiankuttner.de/wp-content/uploads/2021/01/ACS-Appl.-Mater.-Interfaces-2020-Hoeller.pdf},

doi = {10.1021/acsami.0c16398},

year  = {2020},

date = {2020-12-11},

journal = {ACS Applied Materials & Interfaces},

volume = {12},

number = {51},

pages = {57302--57313},

abstract = {Superstructures of gold nanospheres offer augmented surface-enhanced Raman scattering (SERS) activities beyond the limits of their individual building blocks. However, for application as reliable and quantitative colloidal SERS probes, some key aspects need to be considered to combine efficiency and robustness with respect to hotspot excitation, analyte adsorption, signal stability, and colloidal stability. For this purpose, we studied core/satellite superstructures with spherical cores as a simple optically isotropic model system. Superstructures of different core sizes were assembled using bovine serum albumin (BSA), which serves as a non-specific biomacromolecular linker and provides electrosteric stabilization. We show that the “noisy” spectral footprint of the protein coating may serve as an internal standard, which allows accurate monitoring of the adsorption kinetics of analytes. The SERS activity was quantified using 4-mercaptobenzoic acid (MBA) as an aromatic low-molecular-weight model analyte. The molar SERS efficiency was studied by variation of the particle (Au0) and analyte concentrations with a limit of detection of 10–7 M MBA. The practical importance of colloidal stability for robust measurement conditions was demonstrated by comparing the superstructures with their citrate-stabilized or protein-coated building blocks. We explain the theoretical background of hotspot formation by a leader/follower relationship of asymmetric control between the core and the satellites and give practical guidelines for robust colloidal SERS sensing probes.},

note = {* Corresponding author.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{BermudezUrena:2020bo,

title = {The Role of Structure: Order vs. Disorder in Bio-Photonic Systems: General Discussion},

author = {Esteban Bermudez Ure{ñ}a and Yin Chang and Helen Clark and Bianca Datta and Álvaro Escobar and Mike Hardy and Hendrik Hölscher and Amanda Holt and Golnaz Isapour and Mathias Kolle and Christian Kuttner and Victoria Lloyd and Amina Matt and Anthony McDougal and Sebastien R Mouchet and Laura Ospina and Andrew Parnell and Thomas G Parton and Primoz Pirih and Alex Qiu and Lukas Schertel and Gea Theodora van de Kerkhof and Silvia Vignolini and William Wardley and Diederik Wiersma},

url = {https://christiankuttner.de/wp-content/uploads/2021/01/Faraday-Discuss.-2020-Bermudez-Urena.pdf},

doi = {10.1039/D0FD90015J},

year  = {2020},

date = {2020-10-09},

journal = {Faraday Discussions},

volume = {223},

pages = {233--246},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Arwin:2020ic,

title = {Optics and Photonics in Nature: General Discussion},

author = {Hans Arwin and Pascal Barla and Adam James Blake and Aleca Borsuk and Melanie Brien and Stephanie Burg and Yin Chang and Pascal Freyer and Mike Hardy and Amanda Holt and Akhil Kallepalli and Gea Theodora van de Kerkhof and Mathias Kolle and Christian Kuttner and Mathieu Ladouce and Amina Matt and Sebastien R Mouchet and Nicola J Nadeau and Daniel Osorio and Andrew Parnell and Primoz Pirih and Anupama Prakash and Giselle Rosetta and Lukas Schertel and Diana Skigin and Doekele Stavenga and Silvia Vignolini and Pete Vukusic and Ming Xiao},

url = {https://christiankuttner.de/wp-content/uploads/2021/01/Faraday-Discuss.-2020-Arwin.pdf},

doi = {10.1039/D0FD90013C},

year  = {2020},

date = {2020-10-09},

journal = {Faraday Discussions},

volume = {223},

pages = {107--124},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Clark:2020kj,

title = {Bio-Inspired Optics: General Discussion},

author = {Helen Clark and Bianca Datta and Leila Deravi and Carlos Fiorentino and Stefano Fornasaro and Mike Hardy and Amanda Holt and Christian Kuttner and Sebastien R Mouchet and Laura Ospina and Andrew Parnell and Thomas G Parton and Giuseppe Maria Paterno and Radislav Potyrailo and Alex Qiu and Giselle Rosetta and Franziska Schenk and Lukas Schertel and Doekele Stavenga and Ullrich Steiner and Gea Theodora van de Kerkhof and Bodo Wilts and Ming Xiao},

url = {https://christiankuttner.de/wp-content/uploads/2021/01/Faraday-Discuss.-2020-Clark.pdf},

doi = {10.1039/D0FD90014A},

year  = {2020},

date = {2020-10-09},

journal = {Faraday Discussions},

volume = {223},

pages = {183--194},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{BermudezUrena:2020ej,

title = {The Role of Composition: Natural Materials vs. Synthetic Composites: General Discussion},

author = {Esteban Bermudez Ure{ñ}a and Aleca Borsuk and Helen Clark and Robert Fosbury and Maria Helena Godinho and Mike Hardy and Amanda Holt and Mathias Kolle and Christian Kuttner and Martin Lopez-Garcia and Anthony McDougal and Sebastien R Mouchet and Nicola J Nadeau and Natalie Nicolas and Benjamin A Palmer and Andrew Parnell and Thomas G Parton and Primoz Pirih and Alex Qiu and Gerd Schroder-Turk and Gea T van de Kerkhof and Pete Vukusic and William Wardley and Ming Xiao},

url = {https://christiankuttner.de/wp-content/uploads/2021/01/Faraday-Discuss.-2020-Bermudez-Urena-1.pdf},

doi = {10.1039/D0FD90017F},

year  = {2020},

date = {2020-10-09},

journal = {Faraday Discussions},

volume = {223},

pages = {295--306},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Holler:2020ep,

title = {Colloidal Superstructures with Triangular Cores: Size Effects on SERS Efficiency},

author = {Roland P M Höller° and Christian Kuttner°* and Martin Mayer and Ruosong Wang and Martin Dulle and Rafael Contreras-Cáceres and Andreas Fery and Luis M Liz-Marzán},

url = {https://christiankuttner.de/wp-content/uploads/2021/01/ACS-Photonics-2020-Hoeller.pdf},

doi = {10.1021/acsphotonics.0c00642},

year  = {2020},

date = {2020-05-28},

journal = {ACS Photonics},

volume = {7},

number = {7},

pages = {1839--1848},

abstract = {The design of colloidal nanostructures as surface-enhanced Raman scattering (SERS) substrates requires control over both structural and optical characteristics. A widespread expectation is that the SERS efficiency depends crucially on whether the plasmonic excitation matches the exciting laser wavelength. However, also the balance between radiative (scattering) and nonradiative (absorbing) properties plays a major role, regarding both the efficiency of near-field enhancement and the experimentally observed signal intensity. We present a study of the influence of mode-excitation matching and extinction characteristics for core/satellite superstructures, comprising gold nanotriangles decorated with small gold nanospheres. The variation of the core size and aspect ratio allowed tuning the main coupled mode between 700 and 800 nm, from off-resonant through resonant at 785 nm, as well as tuning extinction contributions, from dominantly absorbing to dominantly scattering. We observed additional gains of 1−2 orders of magnitude in signal enhancement, which were correlated to core size and diffuse optical properties. Our findings indicate a competition between SERS enhancement and increased scattering losses in larger assemblies. Thus, a balance of optical parameters is required for efficient SERS and the development of assemblies as advanced sensing devices.

 },

note = {° Contributed equally. * Corresponding author. Selected as Journal Cover.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Espinosa:2020dd,

title = {Janus Magnetic-Plasmonic Nanoparticles for Magnetically Guided and Thermally Activated Cancer Therapy},

author = {Ana Espinosa and Javier Reguera and Alberto Curcio and Alvaro Munoz-Noval and Christian Kuttner and Aurore Van de Walle and Luis M Liz-Marzán and Claire Wilhelm},

url = {https://christiankuttner.de/wp-content/uploads/2021/01/Small-2020-Espinosa.pdf},

doi = {10.1002/smll.201904960},

year  = {2020},

date = {2020-02-20},

journal = {Small},

volume = {16},

number = {11},

pages = {1904960},

abstract = {Progress of thermal tumor therapies and their translation into clinical practice are limited by insufficient nanoparticle concentration to release therapeutic heating at the tumor site after systemic administration. Herein, the use of Janus magneto‐plasmonic nanoparticles, made of gold nanostars and iron oxide nanospheres, as efficient therapeutic nanoheaters whose on‐site delivery can be improved by magnetic targeting, is proposed. Single and combined magneto‐ and photo‐thermal heating properties of Janus nanoparticles render them as compelling heating elements, depending on the nanoparticle dose, magnetic lobe size, and milieu conditions. In cancer cells, a much more effective effect is observed for photothermia compared to magnetic hyperthermia, while combination of the two modalities into a magneto‐photothermal treatment results in a synergistic cytotoxic effect in vitro. The high potential of the Janus nanoparticles for magnetic guiding confirms them to be excellent nanostructures for in vivo magnetically enhanced photothermal therapy, leading to efficient tumor growth inhibition.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{RuizMuelle:2019hw,

title = {Hybrid Surfaces Active in Catalysis based on Gold Nanoparticles Modified with Redox-Active Pendants and Polymer Brushes},

author = {Ana Belén Ruiz-Muelle and Christian Kuttner and Carlos Alarcón-Fernández and Juan Manuel López-Romero and Petra Uhlmann and Rafael Contreras-Cáceres and Ignacio Fernández},

url = {https://christiankuttner.de/wp-content/uploads/2021/01/Appl.-Surf.-Sci.-2019-Ruiz-Muelle.pdf},

doi = {10.1016/j.apsusc.2019.143598},

year  = {2019},

date = {2019-12-01},

journal = {Applied Surface Science},

volume = {496},

pages = {143598},

abstract = {We present hybrid systems bearing both plasmonic colloids and redox-active molecules that have demonstrated excellent performances in the catalytic reduction of nitrophenol (Nip) to aminophenol (Amp) in the presence of sodium borohydride. First, amino-functionalized spherical and triangular gold nanoparticles (AuNSs and AuNTs, respectively) were covalently incorporated onto polyacrylic acid (PAA) brushes attached to silicon surfaces. Next, a redox-active anthraquinone derivative (AQ-COOH) was immobilized onto the AuNPs surface by amidation reactions. The AuNP concentrations were varied to increase the incorporation and distribution of gold onto the PAA brushes. The catalytic activity in the reduction of 3-Nip and 4-Nip to Amp by NaBH4 was evaluated by 1H NMR spectroscopy. Colloidal size and morphology are analyzed by transmission electron microscopy (TEM) and UV–visible spectroscopy. Particle distribution on the silicon wafer was analyzed by field emission scanning electron microscopy (FESEM) and atomic force microscopy (AFM). The presence of bonded cysteamine (Cys) and anthraquinone (AQ) derivatives on the gold surface was confirmed by X-ray photoelectron spectroscopy (XPS) and surface-enhanced Raman spectroscopy (SERS). The hybrid system could perform seven consecutive catalytic runs without loss of catalytic activity with conversions higher than 80%.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Quintanilla:2019iz,

title = {Heat Generation by Branched Au/Pd Nanocrystals: Influence of Morphology and Composition},

author = {Marta Quintanilla and Christian Kuttner and Joshua D Smith and Andreas Seifert and Sara E Skrabalak and Luis M Liz-Marzán},

url = {https://christiankuttner.de/wp-content/uploads/2021/01/Nanoscale-2019-Quintanilla.pdf},

doi = {10.1039/C9NR05679C},

year  = {2019},

date = {2019-01-01},

journal = {Nanoscale},

volume = {11},

number = {41},

pages = {19561--19570},

abstract = {Bimetallic gold–palladium particles were originally proposed as catalysts with tunable reaction rates. Following the development of synthesis routes that offer better control on the morphology and composition of the particles, novel optical sensing functionalities were more recently proposed. Since temperature is a fundamental parameter that interplays with every other proposed application, we studied the light-to-heat conversion ability of Au/Pd bimetallic nanoparticles with a regular octapodal shape. Both compositional (Au-to-Pd ratio) and structural (diagonal tip-to-tip distance and tip width) characteristics were screened and found to be essential control parameters to promote light absorption and efficient conversion into heat. Electromagnetic simulations reveal that the Pd content, and specifically its distribution inside the branched particle geometry, has a profound impact on the optical properties and is an essential criterion for efficient heating. Notably, the optical and photothermal responses are shown to remain stable throughout extended illumination, with no noticeable structural changes to the branched nanocrystals due to heat generation.},

note = {Invited Article for Nanoscale 10th Anniversary Special Issue},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Kuttner:2019hy,

title = {SERS and Plasmonic Heating Efficiency from Anisotropic Core/Satellite Superstructures},

author = {Christian Kuttner* and Roland P M Höller and Marta Quintanilla and Max J Schnepf and Martin Dulle and Andreas Fery and Luis M Liz-Marzán},

url = {https://christiankuttner.de/wp-content/uploads/2021/01/Nanoscale-2019-Kuttner.pdf},

doi = {10.1039/C9NR06102A},

year  = {2019},

date = {2019-01-01},

journal = {Nanoscale},

volume = {11},

number = {38},

pages = {17655--17663},

abstract = {The optical properties of nanoparticle assemblies can be tailored via hybridization of plasmon modes. Isotropic core/satellite superstructures made of spherical nanoparticles are known to exhibit coupled modes with a strongly scattering (radiative) character, and provide hot spots yielding high activity in surface-enhanced Raman scattering (SERS). However, to complement this functionality with plasmonic heating, additional absorbing (non-radiative) modes are required. We introduce herein anisotropic superstructures formed by decorating a central nanorod with spherical satellite nanoparticles, which feature two coupled modes that allow application for both SERS and heating. On the basis of diffuse reflectance spectroscopy, small-angle X-ray scattering (SAXS), and electromagnetic simulations, the origin of the coupled modes is disclosed and thus serves as a basis toward alternative designs of functional superstructures. This work represents a proof-of-principle for the combination of high SERS efficiency with efficient plasmonic heating by near-infrared irradiation.

},

note = {* Corresponding author.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Kuttner:2018da,

title = {Seeded Growth Synthesis of Gold Nanotriangles: Size Control, SAXS Analysis, and SERS Performance},

author = {Christian Kuttner and Martin Mayer and Martin Dulle and Ana Moscoso and Juan Manuel López-Romero and Stephan Förster and Andreas Fery and Jorge Pérez-Juste and Rafael Contreras-Cáceres},

url = {https://christiankuttner.de/wp-content/uploads/2021/01/ACS-Appl.-Mater.-Interfaces-2018-Kuttner.pdf},

doi = {10.1021/acsami.7b19081},

year  = {2018},

date = {2018-03-01},

journal = {ACS Applied Materials & Interfaces},

volume = {10},

number = {13},

pages = {11152--11163},

abstract = {We studied the controlled growth of triangular prismatic Au nanoparticles with different beveled sides for surface-enhanced Raman spectroscopy (SERS) applications. First, in a seedless synthesis using 3-butenoic acid (3BA) and benzyldimethylammonium chloride (BDAC), gold nanotriangles (AuNTs) were synthesized in a mixture with gold nanooctahedra (AuNOCs) and separated by depletion-induced flocculation. Here, the influence of temperature, pH, and reducing agent on the reaction kinetics was initially investigated by UV–vis and correlated to the size and yield of AuNT seeds. In a second step, the AuNT size was increased by seed-mediated overgrowth with Au. We show for the first time that preformed 3BA-synthesized AuNT seeds can be overgrown up to a final edge length of 175 nm and a thickness of 80 nm while maintaining their triangular shape and tip sharpness. The NT morphology, including edge length, thickness, and tip rounding, was precisely characterized in dispersion by small-angle X-ray scattering and in dry state by transmission electron microscopy and field-emission scanning electron microscopy. For sensor purposes, we studied the size-dependent SERS performance of AuNTs yielding analytical enhancement factors between 0.9 × 104 and 5.6 × 104 and nanomolar limit of detection (10–8–10–9 M) for 4-mercaptobenzoic acid and BDAC. These results confirm that the 3BA approach allows the fabrication of AuNTs in a whole range of sizes maintaining the NT morphology. This enables tailoring of localized surface plasmon resonances between 590 and 740 nm, even in the near-infrared window of a biological tissue, for use as colloidal SERS sensing agents or for optoelectronic applications.

},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Pretscher:2018dc,

title = {pH-Responsive Biohybrid Carrier Material for Phenol Decontamination in Wastewater},

author = {Martin Pretscher and Beatriz A Pineda-Contreras and Kaiser Patrick and Steffen Reich and Judith Schöbel and Christian Kuttner and Ruth Freitag and Andreas Fery and Holger Schmalz and Seema Agarwal},

url = {https://christiankuttner.de/wp-content/uploads/2021/01/Biomacromolecules-2018-Pretscher.pdf},

doi = {10.1021/acs.biomac.8b00361},

year  = {2018},

date = {2018-01-01},

journal = {Biomacromolecules},

volume = {19},

number = {8},

pages = {3224--3232},

abstract = {Smart polymers are a valuable platform to protect and control the activity of biological agents over a wide range of conditions, such as low pH, by proper encapsulation. Such conditions are present in olive oil mill wastewater with phenol as one of the most problematic constituents. We show that elastic and pH-responsive diblock copolymer fibers are a suitable carrier for Corynebacterium glutamicum, i.e., bacteria which are known for their ability to degrade phenol. Free C. glutamicum does not survive low pH conditions and fails to degrade phenol at low pH conditions. Our tea-bag like biohybrid system, where the pH-responsive diblock copolymer acts as a protecting outer shell for the embedded bacteria, allows phenol degradation even at low pH. Utilizing a two-step encapsulation process, planktonic cells were first encapsulated in poly(vinyl alcohol) to protect the bacteria against the organic solvents used in the second step employing coaxial electrospinning.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Brasse:2018it,

title = {Magnetic and Electric Resonances in Particle-to-Film-Coupled Functional Nanostructures},

author = {Yannic Brasse and Mareen B Müller and Matthias Karg and Christian Kuttner and Tobias A F König and Andreas Fery},

url = {https://christiankuttner.de/wp-content/uploads/2021/01/ACS-Appl.-Mater.-Interfaces-2018-Brasse.pdf},

doi = {10.1021/acsami.7b16941},

year  = {2018},

date = {2018-01-01},

journal = {ACS Applied Materials & Interfaces},

volume = {10},

number = {3},

pages = {3133--3141},

abstract = {We investigate the plasmonic coupling of metallic nanoparticles with continuous metal films by studying the effect of the particle-to-film distance, cavity geometry, and particle size. To efficiently screen these parameters, we fabricated a particle-to-film-coupled functional nanostructure for which the particle size and distance vary. We use gold-core/poly(N-isopropylacrylamide)-shell nanoparticles to self-assemble a monolayer of well-separated plasmonic particles, introduce a gradient in the nanoparticle size by an overgrowth process, and finally add a coupling metal film by evaporation. These assemblies are characterized using surface probing and optical methods to show localized magnetic and electric field enhancement. The results are in agreement with finite-difference time-domain modeling methods and calculations of the effective permeability and permittivity. Finally, we provide a proof of concept for dynamic tuning of the cavity size by swelling of the hydrogel layer. Thus, the tunability of the coupled resonance and the macroscopic self-assembly technique provides access to a cost-efficient library for magnetic and electric resonances.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Aitchison:2017gj,

title = {Analytical SERS: General Discussion },

author = {Hannah Aitchison and Javier Aizpurua and Heike Arnolds and Jeremy Baumberg and Steven Bell and Alois Bonifacio and Rohit Chikkaraddy and Paul Dawson and Bart de Nijs and Volker Deckert and Ines Delfino and Giuliana Di Martino and Olga Eremina and Karen Faulds and Augustus Fountain and Sylwester Gawinkowski and Mayte Gomez Castano and Roy Goodacre and Jennifer Gracie and Duncan Graham and Jason Guicheteau and Laurence Hardwick and Mike Hardy and Christian Heck and Lauren Jamieson and Marlous Kamp and Alex Keeler and Christian Kuttner and Judith Langer and Sumeet Mahajan and Natalia Martin Sabanes and Kei Murakoshi and Marc Porter and George Schatz and Sebastian Schlücker and Zhongqun Tian and Ashish Tripathi and Richard Van Duyne and Peter Vikesland},

url = {https://christiankuttner.de/wp-content/uploads/2021/01/Faraday-Discuss.-2017-Aitchison.pdf},

doi = {10.1039/C7FD90096A},

year  = {2017},

date = {2017-11-01},

journal = {Faraday Discussions},

volume = {205},

pages = {1--36},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Steiner:2017ej,

title = {Macroscopic Strain-Induced Transition from Quasi-infinite Gold Nanoparticle Chains to Defined Plasmonic Oligomers},

author = {Anja Maria Steiner and Martin Mayer and Maximilian Seuss and Svetoslav Nikolov and Kenneth D Harris and Alexander Alexeev and Christian Kuttner* and Tobias A F König* and Andreas Fery*},

url = {https://christiankuttner.de/wp-content/uploads/2021/01/ACS-Nano-2017-Steiner.pdf},

doi = {10.1021/acsnano.7b03087},

year  = {2017},

date = {2017-08-01},

journal = {ACS Nano},

volume = {11},

number = {9},

pages = {8871--8880},

abstract = {We investigate the formation of chains of few plasmonic nanoparticles—so-called plasmonic oligomers—by strain-induced fragmentation of linear particle assemblies. Detailed investigations of the fragmentation process are conducted by in situ atomic force microscopy and UV–vis–NIR spectroscopy. Based on these experimental results and mechanical simulations computed by the lattice spring model, we propose a formation mechanism that explains the observed decrease of chain polydispersity upon increasing strain and provides experimental guidelines for tailoring chain length distribution. By evaluation of the strain-dependent optical properties, we find a reversible, nonlinear shift of the dominant plasmonic resonance. We could quantitatively explain this feature based on simulations using generalized multiparticle Mie theory (GMMT). Both optical and morphological characterization show that the unstrained sample is dominated by chains with a length above the so-called infinite chain limit—above which optical properties show no dependency on chain length—while during deformation, the average chain length decrease below this limit and chain length distribution becomes more narrow. Since the formation mechanism results in a well-defined, parallel orientation of the oligomers on macroscopic areas, the effect of finite chain length can be studied even using conventional UV–vis–NIR spectroscopy. The scalable fabrication of oriented, linear plasmonic oligomers opens up additional opportunities for strain-dependent optical devices and mechanoplasmonic sensing.},

note = {* Corresponding author.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Rommel:2017kr,

title = {Direct Metal Deposition of Abrasive Tracks - Potentials Concerning Geometry and Materials},

author = {Daniel Rommel and Michael Terock and Florian Scherm and Christian Kuttner and Uwe Glatzel},

url = {https://christiankuttner.de/wp-content/uploads/2021/01/J.-Laser-Appl.-2017-Rommel.pdf},

doi = {10.2351/1.4983230 },

year  = {2017},

date = {2017-05-01},

journal = {Journal of Laser Applications},

volume = {29},

number = {2},

pages = {022508},

abstract = {Diamond tools are essential in various industries. The high hardness of diamond enables the machining of a wide range of different materials. The materials processed with diamond cutting tools vary from ceramic or metal components to natural materials like stone. In most cases, the abrasive diamonds of such cutting tools are embedded in a metal matrix. Depending on the application, this metal matrix has to fulfill certain requirements of wear resistance in order to achieve a sufficient tool life in combination with optimal cutting results. Laser cladding offers the opportunity to produce metal bond diamond tools with different matrix materials. In this process, the matrix is applied as metalpowder. Together with the diamond particles, the metalpowder is blown into the focus of the laser beam. By moving the laser over the workpiece, an abrasive line trace, consisting of diamonds embedded in a metal matrix, is built. In this way, arbitrary geometries (only limited by the handling system) can be generated. For example, dot patterns or spiral tracks can easily be processed. The use of an Yb-fiber laser with high beam quality (1.05 mm mrad) enables us to build up structures with dimensions less than 1 mm. In contrast to our process, the established ways of manufacturing (electroplating or brazing) require huge efforts to produce abrasive coatings with complex shapes. In order to rate the potential of this laser cladding method, especially for small structures, 1 mm and below, the ability and the influence of different matrix materials are of great interest. Therefore, this work examines the evaluation of three different matrix materials: Co-based matrix, Fe-based matrix, and Ti-based matrix. The abrasive clads were analyzed by light optical microscopy and scanning electron microscopy(SEM); in some cases, preparation took place by focused ion beam etching. Moreover, the diamonds were chemically leached out of the metal matrix and analyzed by SEM and Raman microscopy in order to understand the interfacial reactions between the diamond and the matrix melt. The diamond strength, after the laser cladding process, was measured by mechanical tests.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Reichert:2017ds,

title = {Influence of the Carbonization Temperature on the Mechanical Properties of Thermoplastic Polymer Derived C/C-SiC Composites},

author = {Florian Reichert and Ana M Perez-Mas and Daniel Barreda and Clara Blanco and Ricardo Santamaria and Christian Kuttner and Andreas Fery and Nico Langhof and Walter Krenkel},

url = {https://christiankuttner.de/wp-content/uploads/2021/01/J.-Eur.-Ceram.-Soc.-2017-Reichert.pdf},

doi = {10.1016/j.jeurceramsoc.2016.09.005},

year  = {2017},

date = {2017-01-01},

journal = {Journal of the European Ceramic Society},

volume = {37},

number = {2},

pages = {523--529},

abstract = {Carbon/Carbon (C/C) composites derived from the thermoplastic polymer polyetherimide (PEI) were pyrolized up to 1000 °C, subsequently carbonized in inert atmosphere up to 2200 °C and afterwards infiltrated with liquid silicon. The investigation of fibers and matrix with Raman microspectroscopy revealed, that an increased carbonization temperature leads to an increased carbon order as well as an incipient stress-induced graphitization of the carbon matrix close to the fiber surfaces at 2200 °C. The derived C/C-SiC samples show a maximum flexural strength of 180 MPa with C/C composites treated at 2000 °C and monotonically increasing Young’s moduli ranging from 49 GPa with C/C preforms treated at 1600 °C up to 59 GPa after carbonization at 2200 °C. The carbon fiber strength was evaluated with a single fiber tensile test, which showed a monotonically increased Young’s modulus and a decrease of the strength after carbonization at 2200 °C.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Schnepf:2017hp,

title = {Nanorattles with Tailored Electric Field Enhancement},

author = {Max J Schnepf and Martin Mayer and Christian Kuttner and Moritz Tebbe and Daniel Wolf and Martin Dulle and Thomas Altantzis and Petr Formanek and Stephan Förster and Sara Bals and Tobias A F König and Andreas Fery},

url = {https://christiankuttner.de/wp-content/uploads/2021/01/Nanoscale-2017-Schnepf.pdf},

doi = {10.1039/C7NR02952G},

year  = {2017},

date = {2017-01-01},

journal = {Nanoscale},

volume = {9},

number = {27},

pages = {9376--9385},

abstract = {Nanorattles are metallic core-shell particles with core and shell separated by a dielectric spacer. These nanorattles have been identified as a promising class of nanoparticles, due to their extraordinary high electric-field enhancement inside the cavity. Limiting factors are reproducibility and loss of axial symmetry owing to the movable metal core; movement of the core results in fluctuation of the nanocavity dimensions and commensurate variations in enhancement factor. We present a novel synthetic approach for the robust fixation of the central gold rod within a well-defined box, which results in an axisymmetric nanorattle. We determine the structure of the resulting axisymmetric nanorattles by advanced transmission electron microscopy (TEM) and small angle X-ray scattering (SAXS). Optical absorption and scattering cross-sections obtained from UV-vis-NIR spectroscopy quantitatively agree with finite-difference time-domain (FDTD) simulations based on the structural model derived from SAXS. The predictions of high and homogenous field enhancement are evidenced by scanning TEM electron energy loss spectroscopy (STEM-EELS) measurement on single-particle level. Thus, comprehensive understanding of structural and optical properties is achieved for this class of nanoparticles, paving the way for photonic applications where a defined and robust unit cell is crucial.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Baumberg:2017dx,

title = {SERS in Biology/Biomedical SERS: General Discussion},

author = {Jeremy Baumberg and Steven Bell and Alois Bonifacio and Rohit Chikkaraddy and Malama Chisanga and Stella Corsetti and Ines Delfino and Olga Eremina and Claudia Fasolato and Karen Faulds and Holly Fleming and Roy Goodacre and Duncan Graham and Mike Hardy and Lauren Jamieson and Tia Keyes and Agata Królikowska and Christian Kuttner and Judith Langer and Carin Lightner and Sumeet Mahajan and Jean-Francois Masson and Howbeer Muhamadali and Michael Natan and Fay Nicolson and Evelina Nikelshparg and Konstantinos Plakas and Jürgen Popp and Marc Porter and Daniel Prezgot and Nathalie Pytlik and Sebastian Schlücker and Alessandro Silvestri and Nick Stone and Zhong-Qun Tian and Ashish Tripathi and Marjorie Willner and Pieter Wuytens},

url = {https://christiankuttner.de/wp-content/uploads/2021/01/Faraday-Discuss.-2017-Baumberg.pdf},

doi = {10.1039/C7FD90089A},

year  = {2017},

date = {2017-01-01},

journal = {Faraday Discussions},

volume = {205},

pages = {429--456},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Graham:2017ck,

title = {Theory of SERS Enhancement: General Discussion},

author = {Duncan Graham and Roy Goodacre and Heike Arnolds and Jean-Francois Masson and George Schatz and Jeremy Baumberg and Dong-Ho Kim and Javier Aizpurua and William Lum and Alessandro Silvestri and Bart de Nijs and Yikai Xu and Giuliana Di Martino and Michael Natan and Sebastian Schlücker and Pieter Wuytens and Ian Bruzas and Christian Kuttner and Mike Hardy and Rohit Chikkaraddy and Natalia Martín Sabanés and Ines Delfino and Paul Dawson and Sylwester Gawinkowski and Nicolo Bontempi and Sumeet Mahajan and Stephanie Reich and Ben Hourahine and Steven Bell and Agata Królikowska and Marc Porter and Alex Keeler and Marlous Kamp and Augustus Fountain and Claudia Fasolato and Fabrizio Giorgis and Juan C Otero and Cristiano Matricardi and Richard Van Duyne and John Lombardi and Volker Deckert and Leonora Velleman},

url = {https://christiankuttner.de/wp-content/uploads/2021/01/Faraday-Discuss.-2017-Graham.pdf},

doi = {10.1039/C7FD90095C},

year  = {2017},

date = {2017-01-01},

journal = {Faraday Discussions},

volume = {205},

pages = {173--211},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Aizpurua:2017cc,

title = {Ultrasensitive and Towards Single Molecule SERS: General Discussion},

author = {Javier Aizpurua and Heike Arnolds and Jeremy Baumberg and Ian Bruzas and Rohit Chikkaraddy and Malama Chisanga and Paul Dawson and Volker Deckert and Ines Delfino and Bart de Nijs and Giuliana Di Martino and Joshua Edel and Holly Fleming and Sylwester Gawinkowski and Fabrizio Giorgis and Roy Goodacre and Duncan Graham and Mike Hardy and Christian Heck and Sebastian Heeg and Kevin Hewitt and Lauren Jamieson and Alex Keeler and Agata Królikowska and Christian Kuttner and Nathalie Lidgi-Guigui and Carin Lightner and John Lombardi and Sumeet Mahajan and Natalia Martín Sabanés and Jean-Francois Masson and Niclas Sven Mueller and Howbeer Muhamadali and Kei Murakoshi and Jürgen Popp and Marc Porter and Stephanie Reich and George Schatz and Zhong-Qun Tian and Ashish Tripathi and Richard Van Duyne and Xinping Wang and Alastair Wark and Katherine Kallie Willets and Marjorie Willner},

url = {https://christiankuttner.de/wp-content/uploads/2021/01/Faraday-Discuss.-2017-Aizpurua.pdf},

doi = {10.1039/C7FD90088K},

year  = {2017},

date = {2017-01-01},

journal = {Faraday Discussions},

volume = {205},

pages = {291--330},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Sahabudeen:2016cw,

title = {Wafer-Sized Multifunctional Polyimine-Based Two-Dimensional Conjugated Polymers with High Mechanical Stiffness},

author = {Hafeesudeen Sahabudeen and Haoyuan Qi and Bernhard Alexander Glatz and Diana Tranca and Renhao Dong and Yang Hou and Tao Zhang and Christian Kuttner and Tibor Lehnert and Gotthard Seifert and Ute Kaiser and Andreas Fery and Zhikun Zheng and Xinliang Feng},

url = {https://christiankuttner.de/wp-content/uploads/2021/01/Nat.-Commun.-2016-Sahabudeen.pdf},

doi = {10.1038/ncomms13461},

year  = {2016},

date = {2016-11-01},

journal = {Nature Communicantions},

volume = {7},

number = {1},

pages = {13461},

abstract = {One of the key challenges in two-dimensional (2D) materials is to go beyond graphene, a prototype 2D polymer (2DP), and to synthesize its organic analogues with structural control at the atomic- or molecular-level. Here we show the successful preparation of porphyrin-containing monolayer and multilayer 2DPs through Schiff-base polycondensation reaction at an air–water and liquid–liquid interface, respectively. Both the monolayer and multilayer 2DPs have crystalline structures as indicated by selected area electron diffraction. The monolayer 2DP has a thickness of∼0.7 nm with a lateral size of 4-inch wafer, and it has a Young’s modulus of 267±30 GPa. Notably, the monolayer 2DP functions as an active semiconducting layer in a thin film transistor, while the multilayer 2DP from cobalt-porphyrin monomer efficiently catalyses hydrogen generation from water. This work presents an advance in the synthesis of novel 2D materials for electronics and energy-related applications.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Holler:2016ig,

title = {Protein-Assisted Assembly of Modular 3D Plasmonic Raspberry-like Core/Satellite Nanoclusters: Correlation of Structure and Optical Properties},

author = {Roland P M Höller and Martin Dulle and Sabrina Thomä and Martin Mayer and Anja Maria Steiner and Stephan Förster and Andreas Fery and Christian Kuttner* and Munish Chanana*},

url = {https://christiankuttner.de/wp-content/uploads/2021/01/ACS-Nano-2016-Hoeller.pdf},

doi = {10.1021/acsnano.5b07533},

year  = {2016},

date = {2016-05-01},

journal = {ACS Nano},

volume = {10},

number = {6},

pages = {5740--5750},

abstract = {We present a bottom-up assembly route for a large-scale organization of plasmonic nanoparticles (NPs) into three-dimensional (3D) modular assemblies with core/satellite structure. The protein-assisted assembly of small spherical gold or silver NPs with a hydrophilic protein shell (as satellites) onto larger metal NPs (as cores) offers high modularity in sizes and composition at high satellite coverage (close to the jamming limit). The resulting dispersions of metal/metal nanoclusters exhibit high colloidal stability and therefore allow for high concentrations and a precise characterization of the nanocluster architecture in dispersion by small-angle X-ray scattering (SAXS). Strong near-field coupling between the building blocks results in distinct regimes of dominant satellite-to-satellite and core-to-satellite coupling. High robustness against satellite disorder was proved by UV/vis diffuse reflectance (integrating sphere) measurements. Generalized multiparticle Mie theory (GMMT) simulations were employed to describe the electromagnetic coupling within the nanoclusters. The close correlation of structure and optical property allows for the rational design of core/satellite nanoclusters with tailored plasmonics and well-defined near-field enhancement, with perspectives for applications such as surface-enhanced spectroscopies.},

note = {* Corresponding author.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Mayer:2016js,

title = {Template-Assisted Colloidal Self-Assembly of Macroscopic Magnetic Metasurfaces},

author = {Martin Mayer and Moritz Tebbe and Christian Kuttner and Max J Schnepf and Tobias A F König and Andreas Fery},

url = {https://christiankuttner.de/wp-content/uploads/2021/01/Faraday-Discuss.-2016-Mayer.pdf},

doi = {10.1039/C6FD00013D},

year  = {2016},

date = {2016-01-01},

journal = {Faraday Discussions},

volume = {191},

pages = {159--176},

abstract = {We demonstrate a template-assisted colloidal self-assembly approach for magnetic metasurfaces on macroscopic areas. The choice of anisotropic colloidal particle geometry, assembly pattern and metallic film is based on rational design criteria, taking advantage of mirror-charge effects for gold nanorods placed on gold film. Monodisperse gold nanorods prepared utilizing wet-chemistry are arranged with high precision on wrinkled templates to form linear array-type assemblies and subsequently transferred to a thin gold film. Due to the obtained particle-to-film distance of 1.1 nm, the plasmonic mode of the nanorod is able to couple efficiently with the supporting metallic film, giving rise to a magnetic mode in the visible spectrum (721 nm). Conventional UV-vis-NIR measurements in close correlation with electromagnetic simulations provide evidence for the presence of a magnetic resonance on the macroscopic area. The herein presented scalable lithography-free fabrication process paves the road towards colloidal functional metasurfaces with an optical response in the effective magnetic permeability.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Rommel:2016ie,

title = {Laser Cladding of Diamond Tools: Interfacial Reactions of Diamond and Molten Metal},

author = {Daniel Rommel and Florian Scherm and Christian Kuttner and Uwe Glatzel},

url = {https://christiankuttner.de/wp-content/uploads/2021/01/Surf.-Coat.-Technol.-2016-Rommel.pdf},

doi = {10.1016/j.surfcoat.2016.02.014},

year  = {2016},

date = {2016-01-01},

journal = {Surface & Coatings Technology},

volume = {291},

pages = {62--69},

abstract = {We present the laser cladding as an alternative way for the production of metal bonded diamond tools. Diamond beads for wire saws, which are usually manufactured by means of electroplating, can be fabricated by laser cladding in a single step process. A hardfacing NiCrSiFeB-alloy is used as matrix material to bind the diamonds to the steel substrate. Laser cladding is performed at constant temperature, using an online temperature measurement in combination with laser power control. Experiments were conducted using a high power diode laser as laser source. Key issues are the interfacial reactions of the diamond with the liquid matrix material. To hold the diamonds firmly in contact with the metal matrix, adequate wetting and sufficient embedding is a prerequisite. At the same time the diamonds are affected by the liquid metal and interaction with the laser radiation. The damage was investigated by determination of the toughness index (TI) before and after the laser cladding process. Bonding of the diamonds was analyzed by scanning electron microscopy (SEM) in combination with focused ion beam (FIB) preparation of diamond metal interface. Chemical composition was measured by means of energy dispersive X-ray spectroscopy (EDS). Raman microscopy was applied to verify the formation of an interphase layer of graphite at the interface of diamond and matrix material. The weak bonding strength of graphite interlayers significantly reduces the diamond–matrix adhesion, which is a key issue for industrial applications.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Striolo:2016ep,

title = {Janus and Patchy Nanoparticles: General Discussion},

author = {Alberto Striolo and Jongwook Kim and Luis M Liz-Marzán and Luciano Tadiello and Matthias Pauly and Catherine J Murphy and Anna Roig and David Gracias and Younan Xia and Javier Reguera and Axel H E Müller and Kevin Critchley and Mathias Brust and Leonardo Scarabelli and Martin Mayer and Matthias Thiele and Martin Buzza and András Deák and Ana Maria Bago Rodriguez and Christian Kuttner and Heiko Wolf and Euan Kay and Antonio Stocco and David Portehault and Hedi Mattoussi and Kelley Heatley and Eugenia Kumacheva and Guillermo González and Christoph Hanske and Wenming Tong and Muhammad Nawaz Tahir and Benjamin Abécassis and Steve Granick and Etienne Duguet and Alla Synytska and Krassimir Velikov},

url = {https://christiankuttner.de/wp-content/uploads/2021/01/Faraday-Discuss.-2016-Striolo-1.pdf},

doi = {10.1039/C6FD90048H},

year  = {2016},

date = {2016-01-01},

journal = {Faraday Discussions},

volume = {191},

pages = {117--139},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Striolo:2016iy,

title = {Particles at Interfaces: General Discussion},

author = {Alberto Striolo and Jongwook Kim and Catherine J Murphy and Luis M Liz-Marzán and Joerg Lahann and Javier Reguera and Yu Zhou and Mathias Brust and Antoine Thill and Leonardo Scarabelli and Tobias A F König and Martin Buzza and Christian Kuttner and Estefania Gonzalez Solveyra and Heiko Wolf and Jan Vermant and Matthias Pauly and Andrew Harvie and Lucia Pasquato and Antonio Stocco and Hedi Mattoussi and Eugenia Kumacheva and Kelley Heatley and Christoph Hanske and Roland Faller and David French and Andrei Honciuc and Bernard Binks and Francois Sicard},

url = {https://christiankuttner.de/wp-content/uploads/2021/01/Faraday-Discuss.-2016-Striolo.pdf},

doi = {10.1039/C6FD90050J},

year  = {2016},

date = {2016-01-01},

journal = {Faraday Discussions},

volume = {191},

pages = {407--434},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Striolo:2016if,

title = {Applications: General Discussion},

author = {Alberto Striolo and Francois Sicard and Luis M Liz-Marzán and Catherine J Murphy and Anna Roig and Axel H E Müller and Javier Reguera and Yu Zhou and Mathias Brust and Leonardo Scarabelli and Luciano Tadiello and Antoine Thill and Irene Yarovsky and Martin Mayer and Arturo M López-Quintela and Christian Kuttner and Estefania Gonzalez Solveyra and Heiko Wolf and Euan Kay and Lucia Pasquato and David Buceta and David Portehault and Hedi Mattoussi and Guillermo González and Roland Faller and David French and Benjamin Abécassis and Molly Stevens and Younan Xia and Richard Jones and Marcin Grzelczak and Matthew Penna and Calum Drummond},

url = {https://christiankuttner.de/wp-content/uploads/2021/01/Faraday-Discuss.-2016-Striolo-2.pdf},

doi = {10.1039/C6FD90051H},

year  = {2016},

date = {2016-01-01},

journal = {Faraday Discussions},

volume = {191},

pages = {565--595},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Castelli:2016cf,

title = {Anisotropic Nanoparticles: General Discussion},

author = {Andrea Castelli and Alberto Striolo and Anna Roig and Catherine J Murphy and Javier Reguera and Luis M Liz-Marzán and Axel H E Müller and Kevin Critchley and Yu Zhou and Mathias Brust and Antoine Thill and Leonardo Scarabelli and Luciano Tadiello and Tobias A F König and Beate Reiser and Arturo M López-Quintela and Martin Buzza and András Deák and Christian Kuttner and Estefania Gonzalez Solveyra and Lucia Pasquato and David Portehault and Hedi Mattoussi and Nicholas A Kotov and Eugenia Kumacheva and Kelley Heatley and Julian Bergueiro and Guillermo González and Wenming Tong and Muhammad Nawaz Tahir and Benjamin Abécassis and Oscar Rojas-Carrillo and Younan Xia and Martin Mayer and Davide Peddis},

url = {https://christiankuttner.de/wp-content/uploads/2021/01/Faraday-Discuss.-2016-Castelli.pdf},

doi = {10.1039/C6FD90049F},

year  = {2016},

date = {2016-01-01},

journal = {Faraday Discussions},

volume = {191},

pages = {229--254},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Zeiler:2015es,

title = {The Role of Multi-Walled Carbon Nanotubes in Epoxy Nanocomposites and Resin Transfer Molded Glass Fiber Hybrid Composites: Dispersion, Local Distribution, Thermal, and Fracture/Mechanical Properties},

author = {Rico Zeiler and Christian Kuttner and Ubaid Khalid and Martin H Kothmann and Dirk J Dijkstra and Volker Altstädt},

url = {https://christiankuttner.de/wp-content/uploads/2021/01/Polym.-Compos.-2015-Zeiler.pdf},

doi = {10.1002/pc.23755Cita},

year  = {2015},

date = {2015-09-01},

journal = {Polymer Composites},

volume = {38},

number = {9},

pages = {1849--1863},

abstract = {Hybrid composites containing endless glass fiber reinforcement and surface‐functionalized carbon nanotubes (CNTs) dispersed in the matrix phase were produced by resin transfer molding (RTM). An efficient surface modification of the nanotubes enhances the compatibility with the matrix system and the dispersion quality, enabling the impregnation process via liquid composite molding. We assessed the quality of the RTM process by newly developed methodologies for the quantification of the filtering of CNTs. First, we established a method to analyze the CNT length distribution before and after injection for thermosetting composites to characterize length‐dependent withholding respectively the size distribution of nanotubes in the hybrid composites. Second, the resulting test laminates were locally examined by Raman spectroscopy and compared to reference (nanocomposite) samples of known CNT content to non‐destructively quantify the local CNT concentration along the resin flow path. Moreover, the thermal and mechanical properties of the modified composites were investigated. The nanocomposites containing 0.5 wt% surface‐functionalized CNTs exhibited superior ductility and increased fracture toughness. Glass fiber hybrid composites containing 0.5 wt% functionalized CNTs in the resin phase exhibited increased fracture toughness in mode I and a slight deterioration in mode II due to the constrained formation of hackles. },

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{PinedaContreras:2015kp,

title = {Renaissance for Low Shrinking Resins: All-In-One Solution by Bi-Functional Vinylcyclopropane-Amides},

author = {Paul Pineda Contreras and Christian Kuttner and Andreas Fery and Ullrich Stahlschmidt and Valérie Jérôme and Ruth Freitag and Seema Agarwal},

url = {https://christiankuttner.de/wp-content/uploads/2021/01/Chem.-Commun.-2015-Pineda-Contreras.pdf},

doi = {10.1039/C5CC03901K},

year  = {2015},

date = {2015-07-01},

journal = {Chemical communications (Cambridge, England)},

volume = {51},

number = {59},

pages = {11899--11902},

abstract = {A low volume shrinking vinylcyclopropane (VCP) monomer, showing both a high reactivity and a low viscosity, was obtained by applying a sterically hindered and isomeric spacer element, incorporating intermolecular amide hydrogen bonds. The resulting properties locate this VCP system in a pronounced range that so far no other efficient and radical polymerizable resin could enter.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Glatz:2015hb,

title = {Hierarchical Line-Defect Patterns in Wrinkled Surfaces},

author = {Bernhard A Glatz and Moritz Tebbe and Badr Kaoui and Roland Aichele and Christian Kuttner and Andreas E Schedl and Hans-Werner Schmidt and Walter Zimmermann and Andreas Fery},

url = {https://christiankuttner.de/wp-content/uploads/2021/01/Soft-Matter-2015-Glatz.pdf},

doi = {10.1039/C5SM00318K},

year  = {2015},

date = {2015-04-01},

journal = {Soft Matter},

volume = {11},

number = {17},

pages = {3332--3339},

abstract = {We demonstrate a novel approach for controlling the formation of line-defects in wrinkling patterns by introducing step-like changes in the Young’s modulus of elastomeric substrates supporting thin, stiff layers. Wrinkles are formed upon treating the poly(dimethylsiloxane) (PDMS) substrates by UV/Ozone (UVO) exposure in uniaxially stretched state and subsequent relaxation. Line defects such as minutiae known from fingerprints are a typical feature in wrinkling patterns. The position where these defects occur is random for homogenous substrate elasticity and film thickness. However, we show that they can be predetermined by using PDMS substrates consisting of areas with different cross-linking densities. While changing the cross-linking density is well known to influence the wrinkling wavelength, we use this parameter in this study to force defect formation. The defect formation is monitored in-situ using light microscopy and the mechanical parameters/film thicknesses are determined using imaging AFM indentation measurements. Thus the observed wrinkle-wavelengths can be compared to theoretical predictions. We study the density and morphology of defects for different changes in elasticity and compare our findings with theoretical considerations based on the Swift-Hohenberg-Equation to simply emulate the observed pattern-formation process, finding good agreement. The fact that for suitable changes in elasticity, well-ordered defect patterns are observed is discussed with respect to formation of hierarchical structures for applications in optics and nanotechnology.

},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Tebbe:2015hs,

title = {Silver-Overgrowth-Induced Changes in Intrinsic Optical Properties of Gold Nanorods: From Noninvasive Monitoring of Growth Kinetics to Tailoring Internal Mirror Charges},

author = {Moritz Tebbe and Christian Kuttner and Martin Mayer and Max Männel and Nicolas Pazos-Perez and Tobias A F König and Andreas Fery},

url = {https://christiankuttner.de/wp-content/uploads/2021/01/J.-Phys.-Chem.-C-2015-Tebbe.pdf},

doi = {10.1021/acs.jpcc.5b03155},

year  = {2015},

date = {2015-04-01},

journal = {Journal of Physical Chemistry C},

volume = {119},

number = {17},

pages = {9513--9523},

abstract = {We investigate the effect of surfactant-mediated, asymmetric silver overgrowth of gold nanorods on their intrinsic optical properties. From concentration-dependent experiments, we established a close correlation of the extinction in the UV/vis/NIR frequency range and the morphological transition from gold nanorods to Au@Ag cuboids. Based on this correlation, a generic methodology for in situ monitoring of the evolution of the cuboid morphology was developed and applied in time-dependent experiments. We find that growth rates are sensitive to the substitution of the surfactant headgroup by comparison of benzylhexadecyldimethylammonium chloride (BDAC) with hexadecyltrimethylammonium chloride (CTAC). The time-dependent overgrowth in BDAC proceeds about 1 order of magnitude slower than in CTAC, which allows for higher control during silver overgrowth. Furthermore, silver overgrowth results in a qualitatively novel optical feature: Upon excitation inside the overlap region of the interband transition of gold and intraband of silver, the gold core acts as a retarding element. The much higher damping of the gold core compared to the silver shell in Au@Ag cuboids induces mirror charges at the core/shell interface as shown by electromagnetic simulations. Full control over the kinetic growth process consequently allows for precise tailoring of the resonance wavelengths of both modes. Tailored and asymmetric silver-overgrown gold nanorods are of particular interest for large-scale fabrication of nanoparticles with intrinsic metamaterial properties. These building blocks could furthermore find application in optical sensor technology, light harvesting, and information technology.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Tebbe:2015fm,

title = {Colloidally Stable and Surfactant-Free Protein-Coated Gold Nanorods in Biological Media},

author = {Moritz Tebbe° and Christian Kuttner° and Max Männel and Andreas Fery and Munish Chanana},

url = {https://christiankuttner.de/wp-content/uploads/2021/01/ACS-Appl.-Mater.-Interfaces-2015-Tebbe.pdf},

doi = {10.1021/acsami.5b00335},

year  = {2015},

date = {2015-03-01},

journal = {ACS Applied Materials & Interfaces},

volume = {7},

number = {10},

pages = {5984--5991},

abstract = {In this work, we investigate the ligand exchange of cetyltrimethylammonium bromide (CTAB) with bovine serum albumin for gold nanorods. We demonstrate by surface-enhanced Raman scattering measurements that CTAB, which is used as a shape-directing agent in the particle synthesis, is completely removed from solution and particle surface. Thus, the protein-coated nanorods are suitable for bioapplications, where cationic surfactants must be avoided. At the same time, the colloidal stability of the system is significantly increased, as evidenced by spectroscopic investigation of the particle longitudinal surface plasmon resonance, which is sensitive to aggregation. Particles are stable at very high concentrations (cAu 20 mg/mL) in biological media such as phosphate buffer saline or Dulbecco’s Modified Eagle’s Medium and over a large pH range (2–12). Particles can even be freeze-dried (lyophilized) and redispersed. The protocol was applied to gold nanoparticles with a large range of aspect ratios and sizes with main absorption frequencies covering the visible and the near-IR spectral range from 600 to 1100 nm. Thus, these colloidally stable and surfactant-free protein-coated nanoparticles are of great interest for various plasmonic and biomedical applications.},

note = {° Contributed equally.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Tebbe:2014hp,

title = {Optically Anisotropic Substrates via Wrinkle-Assisted Convective Assembly of Gold Nanorods on Macroscopic Areas.},

author = {Moritz Tebbe and Martin Mayer and Bernhard A Glatz and Christoph Hanske and Patrick T Probst and Mareen B Müller and Matthias Karg and Munish Chanana and Tobias A F König and Christian Kuttner and Andreas Fery},

url = {https://christiankuttner.de/wp-content/uploads/2021/01/Faraday-Discuss.-2015-Tebbe.pdf},

doi = {10.1039/C4FD00236A},

year  = {2015},

date = {2015-01-01},

journal = {Faraday Discussions},

volume = {181},

pages = {243--260},

abstract = {We demonstrate the large-scale organisation of anisotropic nanoparticles into linear assemblies displaying optical anisotropy on macroscopic areas. Monodisperse gold nanorods with a hydrophilic protein shell are arranged by dip-coating on wrinkled surfaces and subsequently transferred to indium tin oxide (ITO) substrates by capillary transfer printing. We elucidate how tuning the wrinkle amplitude enables us to precisely adjust the assembly morphology and fabricate single, double and triple nanorod lines. For the single lines, we quantify the order parameter of the assemblies as well as interparticle distances from scanning electron microscopy (SEM) images. We find an order parameter of 0.97 and a mean interparticle gap size of 7 nm. This combination of close to perfect uni-axial alignment and close-packing gives rise to pronounced macroscopic anisotropic optical properties due to strong plasmonic coupling. We characterise the optical response of the assemblies on ITO-coated glass via UV/vis/NIR spectroscopy and determine an optical order parameter of 0.91. The assemblies are thus plasmonic metamaterials, as their periodicity and building block sizes are well below the optical wavelength. The presented approach does not rely on lithographic patterning and provides access to functional materials, which could have applications in subwavelength waveguiding, photovoltaics, and for large-area metamaterial fabrication.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Hanske:2014gg,

title = {Strongly Coupled Plasmonic Modes on Macroscopic Areas via Template-Assisted Colloidal Self-Assembly},

author = {Christoph Hanske and Moritz Tebbe and Christian Kuttner and Vera Bieber and Vladimir V Tsukruk and Munish Chanana and Tobias A F König and Andreas Fery},

url = {https://christiankuttner.de/wp-content/uploads/2021/01/Nano-Lett.-2014-Hanske.pdf},

doi = {10.1021/nl502776s},

year  = {2014},

date = {2014-11-27},

journal = {Nano Letters},

volume = {14},

number = {12},

pages = {6863--6871},

abstract = {We present ensembles of surface-ordered nanoparticle arrangements, which are formed by template-assisted self-assembly of monodisperse, protein-coated gold nanoparticles in wrinkle templates. Centimeter-squared areas of highly regular, linear assemblies with tunable line width are fabricated and their extinction cross sections can be characterized by conventional UV/vis/NIR spectroscopy. Modeling based on electrodynamic simulations shows a clear signature of strong plasmonic coupling with an interparticle spacing of 1–2 nm. We find evidence for well-defined plasmonic modes of quasi-infinite chains, such as resonance splitting and multiple radiant modes. Beyond elementary simulations on the individual chain level, we introduce an advanced model, which considers the chain length distribution as well as disorder. The step toward macroscopic sample areas not only opens perspectives for a range of applications in sensing, plasmonic light harvesting, surface enhanced spectroscopy, and information technology but also eases the investigation of hybridization and metamaterial effects fundamentally.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Muller:2014cs,

title = {Plasmonic Library Based on Substrate-Supported Gradiential Plasmonic Arrays},

author = {Mareen B Müller and Christian Kuttner and Tobias A F König and Vladimir V Tsukruk and Stephan Förster and Matthias Karg and Andreas Fery},

url = {https://christiankuttner.de/wp-content/uploads/2021/01/ACS-Nano-2014-Mueller.pdf},

doi = {10.1021/nn503493c},

year  = {2014},

date = {2014-08-19},

journal = {ACS Nano},

volume = {8},

number = {9},

pages = {9410--9421},

abstract = {We present a versatile approach to produce macroscopic, substrate-supported arrays of plasmonic nanoparticles with well-defined interparticle spacing and a continuous particle size gradient. The arrays thus present a “plasmonic library” of locally noncoupling plasmonic particles of different sizes, which can serve as a platform for future combinatorial screening of size effects. The structures were prepared by substrate assembly of gold-core/poly(N-isopropylacrylamide)-shell particles and subsequent post-modification. Coupling of the localized surface plasmon resonance (LSPR) could be avoided since the polymer shell separates the encapsulated gold cores. To produce a particle array with a broad range of well-defined but laterally distinguishable particle sizes, the substrate was dip-coated in a growth solution, which resulted in an overgrowth of the gold cores controlled by the local exposure time. The kinetics was quantitatively analyzed and found to be diffusion rate controlled, allowing for precise tuning of particle size by adjusting the withdrawal speed. We determined the kinetics of the overgrowth process, investigated the LSPRs along the gradient by UV–vis extinction spectroscopy, and compared the spectroscopic results to the predictions from Mie theory, indicating the absence of local interparticle coupling. We finally discuss potential applications of these substrate-supported plasmonic particle libraries and perspectives toward extending the concept from size to composition variation and screening of plasmonic coupling effects.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Kuttner:2013bc,

title = {Direct Thiol-Ene Photocoating of Polyorganosiloxane Microparticles},

author = {Christian Kuttner* and Petra Caroline Maier and Carmen Kunert and Helmut Schlaad and Andreas Fery},

url = {https://christiankuttner.de/wp-content/uploads/2021/01/Langmuir-2013-Kuttner.pdf},

doi = {10.1021/la4039864},

year  = {2013},

date = {2013-12-09},

journal = {Langmuir},

volume = {29},

number = {52},

pages = {16119--16126},

abstract = {This work presents the modification of polyorganosiloxane microparticles by surface-initiated thiol–ene photochemistry. By this photocoating, we prepared different core/shell particles with a polymeric shell within narrow size distributions (PDI = 0.041–0.12). As core particle, we used highly monodisperse spherical polyorganosiloxane particles prepared from (3-mercaptopropyl)trimethoxysilane (MPTMS) with a radius of 0.49 μm. We utilize the high surface coverage of mercaptopropyl functions to generate surface-localized radicals upon irradiation with UVA-light without additional photoinitiator. The continuous generation of radicals was followed by a dye degradation experiment (UV/vis spectroscopy). Surface-localized radicals were used as copolymer anchoring sites (“grafting-onto” deposition of different PB-b-PS diblock copolymers) and polymerization initiators (“grafting-from” polymerization of PS). Photocoated particles were characterized for their morphology (SEM, TEM), size, and size distribution (DLS). For PS-coated particles, the polymer content (up to 24% in 24 h) was controlled by the polymerization time upon UVA exposure. The coating thickness was evaluated by thermogravimetric analysis (TGA) using a simple analytical core/shell model. Raman spectroscopy was applied to directly follow the time-dependent consumption of thiols by photoinitiation.},

note = {* Corresponding author.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Poehlmann:2014km,

title = {On the Interplay of Shell Structure with Low- and High-Frequency Mechanics of Multifunctional Magnetic Microbubbles},

author = {Melanie Poehlmann and Dmitry Grishenkov and Satya V V N Kothapalli and Johan Harmark and Hans Hebert and Alexandra Philipp and Roland P M Höller and Maximilian Seuss and Christian Kuttner and Silvia Margheritelli and Gaio Paradossi and Andreas Fery},

url = {https://christiankuttner.de/wp-content/uploads/2021/01/Soft-Matter-2014-Poehlmann.pdf},

doi = {10.1039/C3SM51560E},

year  = {2013},

date = {2013-10-11},

journal = {Soft Matter},

volume = {10},

number = {1},

pages = {214--226},

abstract = {Polymer-shelled magnetic microbubbles have great potential as hybrid contrast agents for ultrasound and magnetic resonance imaging. In this work, we studied US/MRI contrast agents based on air-filled poly(vinyl alcohol)-shelled microbubbles combined with superparamagnetic iron oxide nanoparticles (SPIONs). The SPIONs are integrated either physically or chemically into the polymeric shell of the microbubbles (MBs). As a result, two different designs of a hybrid contrast agent are obtained. With the physical approach, SPIONs are embedded inside the polymeric shell and with the chemical approach SPIONs are covalently linked to the shell surface. The structural design of hybrid probes is important, because it strongly determines the contrast agent's response in the considered imaging methods. In particular, we were interested how structural differences affect the shell’s mechanical properties, which play a key role for the MBs' US imaging performance. Therefore, we thoroughly characterized the MBs' geometric features and investigated low-frequency mechanics by using atomic force microscopy (AFM) and high-frequency mechanics by using acoustic tests. Thus, we were able to quantify the impact of the used SPIONs integration method on the shell’s elastic modulus, shear modulus and shear viscosity. In summary, the suggested approach contributes to an improved understanding of structure–property relations in US-active hybrid contrast agents and thus provides the basis for their sustainable development and optimization.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Kuttner:2013ja,

title = {Influence of the Polymeric Interphase Design on the Interfacial Properties of (Fiber-Reinforced) Composites},

author = {Christian Kuttner and Andreas Hanisch and Holger Schmalz and Michaela Eder and Helmut Schlaad and Ingo Burgert and Andreas Fery},

url = {https://christiankuttner.de/wp-content/uploads/2021/01/ACS-Appl.-Mater.-Interfaces-2013-Kuttner.pdf},

doi = {10.1021/am302694h},

year  = {2013},

date = {2013-02-27},

journal = {ACS Applied Materials & Interfaces},

volume = {5},

number = {7},

pages = {2469--2478},

abstract = {In fiber-reinforced composites, the interphase nanostructure (i.e., the extended region between two phases in contact) has a pronounced influence on their interfacial adhesion. This work aims at establishing a link between the interphase design of PS-based polymeric fiber coatings and their influence on the micromechanical performance of epoxy-based composite materials. Thiol–ene photochemistry was utilized to introduce a polymeric gradient on silica-like surfaces following a two-step approach without additional photoinitiator. Two complementary grafting-techniques were adapted to modify glass fibers: “Grafting-onto” deposition of PB-b-PS diblock copolymers for thin-film coatings (thickness <20 nm) at low grafting density (<0.1 chains/nm2) - and “grafting-from” polymerization for brush-like PS homopolymer coatings of higher thickness (up to 225 nm) and higher density. Polymer-coated glass fibers were characterized for polymer content using thermogravimetric analysis (TGA) and their nanostructural morphologies by scanning electron microscopy (SEM). Model substrates of flat glass and silicon were studied by atomic force microscopy (AFM) and spectroscopic ellipsometry (SE). The change in interfacial shear strength (IFSS) due to fiber modification was determined by a single fiber pull-out experiment. Thick coatings (>40 nm) resulted in a 50% decrease in IFSS. Higher shear strength occurred for thinner coatings of homopolymer and for lower grafting densities of copolymer. Increased IFSS (10%) was found upon dilution of the surface chain density by mixing copolymers. We show that the interfacial shear strength can be increased by tailoring of the interphase design, even for systems with inherently poor adhesion. Perspectives of polymeric fiber coatings for tailored matrix–fiber compatibility and interfacial adhesion are discussed.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Groschel:2013by,

title = {Janus-Micellen als effektive suprakolloidale Dispersionsmittel für Kohlenstoff-Nanoröhren},

author = {André H Gröschel and Tina I Löbling and Petar D Petrov and Markus Müllner and Christian Kuttner and Florian Wieberger and Axel H E Müller},

url = {https://christiankuttner.de/wp-content/uploads/2021/01/Angew.-Chem.-2013-Groeschel.pdf},

doi = {10.1002/ange.201208293},

year  = {2013},

date = {2013-02-20},

journal = {Angewandte Chemie},

volume = {125},

number = {13},

pages = {3688--3693},

abstract = {Suprakolloidale Hybride: Polymerbasierte Janus‐Micellen wurden entwickelt, die mehrwandige Kohlenstoff‐Nanoröhren in verschiedenen Lösungsmitteln, einschließlich Wasser, stabilisieren. Entscheidend für die Stabilisierungseigenschaften ist das Größenverhältnis zwischen stabilisierendem und adsorbierendem Patch („Janus‐Balance“). Die Struktur der Nanoröhren bleibt durch die suprakolloidale Wechselwirkung unbeeinträchtigt.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Groschel:2013bs,

title = {Janus Micelles as Effective Supracolloidal Dispersants for Carbon Nanotubes},

author = {André H Gröschel and Tina I Löbling and Petar D Petrov and Markus Müllner and Christian Kuttner and Florian Wieberger and Axel H E Müller},

url = {https://christiankuttner.de/wp-content/uploads/2021/01/Angew.-Chem.-Int.-Ed.-2013-Groeschel.pdf},

doi = {10.1002/anie.201208293},

year  = {2013},

date = {2013-02-20},

journal = {Angewandte Chemie International Edition},

volume = {52},

number = {13},

pages = {3602--3606},

abstract = {Supracolloidal hybrids: Soft polymer‐based Janus micelles provide excellent stabilization for multi‐walled carbon nanotubes (see scheme) in a variety of solvents, including water. The size ratio of the micelle′s stabilizing corona to adsorbing corona (Janus balance) is decisive for good physisorption and stabilization. The supracolloidal interaction preserves the structural integrity of the nanotubes, which is essential for maintaining their useful properties.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Zeiler:2014kj,

title = {Liquid Composite Molding-Processing and Characterization of Fiber-Reinforced Composites Modified with Carbon Nanotubes},

author = {Rico Zeiler and U Khalid and Christian Kuttner and M Kothmann and D J Dijkstra and Andreas Fery and Volker Altstädt},

url = {https://christiankuttner.de/wp-content/uploads/2021/01/AIP-Conf.-Proc.-2014-Zeiler.pdf},

doi = {10.1063/1.4873831},

year  = {2013},

date = {2013-01-17},

journal = {AIP Conference Proceedings},

volume = {1593},

pages = {503--507},

abstract = {The increasing demand in fiber-reinforced plastics (FRPs) necessitates economic processing of high quality, like the vacuum-assisted resin transfer molding (VARTM) process. FRPs exhibit excellent in-plane properties but weaknesses in off-plane direction. The addition of nanofillers into the resinous matrix phase embodies a promising approach due to benefits of the nano-scaled size of the filler, especially its high surface and interface areas. Carbon nanotubes (CNTs) are preferable candidates for resin modification in regard of their excellent mechanical properties and high aspect ratios. However, especially the high aspect ratios give rise to withholding or filtering by fibrous fabrics during the impregnation process, i.e. length dependent withholding of tubes (short tubes pass through the fabric, while long tubes are restrained) and a decrease in the local CNT content in the laminate along the flow path can occur. In this study, hybrid composites containing endless glass fiber reinforcement and surface functionalized CNTs dispersed in the matrix phase were produced by VARTM. New methodologies for the quantification of the filtering of CNTs were developed and applied to test laminates. As a first step, a method to analyze the CNT length distribution before and after injection was established for thermosetting composites to characterize length dependent withholding of nanotubes. The used glass fiber fabric showed no perceptible length dependent retaining of CNTs. Afterward, the resulting test laminates were examined by Raman spectroscopy and compared to reference samples of known CNT content. This Raman based technique was developed further to assess the quality of the impregnation process and to quantitatively follow the local CNT content along the injection flow in cured composites. A local decline in CNT content of approx. 20% was observed. These methodologies allow for the quality control of the filler content and size-distribution in CNT based hybrid composites.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Kuttner:2012cq,

title = {Photochemical Synthesis of Polymeric Fiber Coatings and their Embedding in Matrix Material: Morphology and Nanomechanical Properties at the Fiber-Matrix Interface},

author = {Christian Kuttner and Moritz Tebbe and Helmut Schlaad and Ingo Burgert and Andreas Fery},

url = {https://christiankuttner.de/wp-content/uploads/2021/01/ACS-Appl.-Mater.-Interfaces-2012-Kuttner.pdf},

doi = {10.1021/am300576c},

year  = {2012},

date = {2012-06-15},

journal = {ACS Applied Materials & Interfaces},

volume = {4},

number = {7},

pages = {3485--3492},

abstract = {In this contribution, we present a three-step pathway to produce a novel fiber coating, study its embedding in epoxy resin and characterize its nanomechanical properties at the interface between fiber and matrix. Inorganic surfaces were sulfhydrylated for subsequent use in thiol-initiated ene photopolymerization. The influence of water on the sulfhydrylation process was studied to find conditions allowing monomolecular deposition. Surface morphology as well as SH-content were evaluated by UV/vis spectroscopy, atomic force microscopy and spectroscopic ellipsometry. Brush-like polymer layers (PS and PMMA) were introduced by UV-light initiated surface polymerization of vinyl monomers. Polymer growth and morphology were studied. After embedding, the nanomechanics of the interfacial region of the fibers was studied. AFM force spectroscopy allowed the mapping of the stiffness distribution at the cross-section of the composite with high spatial resolution. Elastic moduli were determined by Hertzian contact mechanics. The individual phases of the composite material (fiber, interphase, and matrix) can be clearly distinguished based on their mechanical response. The synthesis, morphology, and mechanical properties of an interphase based on a polymeric graft-film swollen with matrix material are shown, and perspectives of these novel coatings for improved matrix–fiber compatibility and interfacial adhesion are discussed.



},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Pretzl:2012dy,

title = {Formation and Mechanical Characterization of Aminoplast Core/Shell Microcapsules},

author = {Melanie Pretzl and Martin P Neubauer and Melanie Tekaat and Carmen Kunert and Christian Kuttner and Géraldine Leon and Damien Berthier and Philipp Erni and Lahoussine Ouali and Andreas Fery},

url = {https://christiankuttner.de/wp-content/uploads/2021/01/ACS-Appl.-Mater.-Interfaces-2012-Pretzl.pdf},

doi = { 10.1021/am300273b},

year  = {2012},

date = {2012-05-14},

journal = {ACS Applied Materials & Interfaces},

volume = {4},

number = {6},

pages = {2940--2948},

abstract = {This work aims at establishing a link between process conditions and resulting micromechanical properties for aminoplast core/shell microcapsules. The investigated capsules were produced by the in situ polymerization of melamine formaldehyde resins, which represents a widely used and industrially relevant approach in the field of microencapsulation. Within our study, we present a quantitative morphological analysis of the capsules’ size and shell thickness. The diameter of the investigated capsules ranged from 10 to 50 μm and the shell thickness was found in a range between 50 and 200 nm. As key parameter for the control of the shell thickness, we identified the amount of amino resin per total surface area of the dispersed phase. Mechanical properties were investigated using small deformations on the order of the shell thickness by atomic force microscopy with a colloidal probe setup. The obtained capsule stiffness increased with an increasing shell thickness from 2 to 30 N/m and thus showed the same trend on the process parameters as the shell thickness. A simple analytical model was adopted to explain the relation between capsules’ geometry and mechanics and to estimate the elastic modulus of the shell about 1.7 GPa. Thus, this work provides strategies for a rational design of microcapsule mechanics.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}