% Encoding: UTF-8 @COMMENT{BibTeX export based on data in FAU CRIS: https://cris.fau.de/} @COMMENT{For any questions please write to cris-support@fau.de} @inproceedings{faucris.206330528, abstract = {A simple continuous-flow liquid-phase approach for the partial coating of nanoscale particles with metal was established [1]. Unique to this is the surface conformal and morphology-tailored growth of the metal. Due to their anisotropic surface character, the resulting materials are potentially relevant as particulate surfactants or for the assembly of novel photonic, catalytic or theranostic materials. In this contribution, three significant challenges are described that have recently been tackled. Firstly, it is shown how the use of a KM type micromixer with very short characteristic mixing times facilitates the understanding of the metal coating growth process. Secondly, the application of multiwavelength analytical ultracentrifugation for the determination of yield, coating thickness, and coverage distribution of the metal patches is considered. The validity of the measurements through microscopy and spectroscopy is confirmed and it is demonstrated how this characterization method can be employed to support process design. Finally, it is illustrated how the continuous flow approach can be developed in order to produce anisotropic metal-coated particles on the gram scale, and a first analysis of the novel optical properties of the powders is provided.
[1] T. Meincke, H. Bao, L. Pflug, M. Stingl, R. N. Klupp Taylor, Chem. Eng. J. 2016, 308, 89. DOI: https://doi.org/10.1016/j.cej.2016.09.0}, address = {Weinheim}, author = {Klupp Taylor, Robin and Meincke, Thomas and Sadafi, Fabrizio-Zagros and Walter, Johannes and Pflug, Lukas and Watanabe, Shun and Peukert, Wolfgang and Stingl, Michael}, booktitle = {Chemie Ingenieur Technik (Special Issue: ProcessNet‐Jahrestagung und 33. DECHEMA‐Jahrestagung der Biotechnologen 2018)}, date = {2018-09-11/2018-09-13}, doi = {10.1002/cite.201855147}, faupublication = {yes}, peerreviewed = {unknown}, publisher = {WILEY‐VCH Verlag GmbH & Co. KGaA}, title = {{Anisometric} engineering of particle interfaces: {Multidimensional} characterization and gram‐scale production}, url = {https://onlinelibrary.wiley.com/doi/abs/10.1002/cite.201855147?af=R}, venue = {Aachen}, year = {2018} } @article{faucris.206310178, abstract = {The ability to confine and manipulate light below the diffraction limit is a major goal of future multifunctional optoelectronic/plasmonic systems. Here, we demonstrate the design and realization of a tunable and localized electrical source of excitons coupled to surface plasmons based on a polymer light emitting field-effect transistor (LEFET). Gold nanorods that are integrated into the channel support localized surface plasmons and serve as nanoantennas for enhanced electroluminescence. By precise spatial control of the near-infrared emission zone in the LEFET via the applied voltages the near-field coupling between electrically generated excitons and the nanorods can be turned on or off as visualized by a change of electroluminescence intensity. Numerical calculations and spectroscopic measurements corroborate significant local electroluminescence enhancement due to the high local density of photonic states in the vicinity of the gold nanorods. Importantly, the integration of plasmonic nanostructures hardly influences the electrical performance of the LEFETs, thus, highlighting their mutual compatibility in novel active plasmonic devices.}, author = {Zakharko, Yuriy and Held, Martin and Sadafi, Fabrizio-Zagros and Gannott, Florentina and Mandavi, Ali and Peschel, Ulf and Klupp Taylor, Robin and Zaumseil, Jana}, doi = {10.1021/acsphotonics.5b00413}, faupublication = {yes}, journal = {ACS Photonics}, keywords = {surface plasmon polariton;organic semiconductor;field-effect transistor;electroluminescence;Purcell effect;active plasmonics}, month = {Jan}, pages = {1-7}, peerreviewed = {Yes}, title = {{On}-{Demand} {Coupling} of {Electrically} {Generated} {Excitons} with {Surface} {Plasmons} via {Voltage}-{Controlled} {Emission} {Zone} {Position}}, volume = {3}, year = {2016} } @article{faucris.206242359, author = {Sadafi, Fabrizio-Zagros and Sauerbeck, Christian and Braunschweig, Björn and Klupp Taylor, Robin}, doi = {10.1039/C8CE00866C}, faupublication = {yes}, journal = {Crystengcomm}, pages = {6214-6224}, peerreviewed = {Yes}, title = {{On} the complex role of ammonia in the electroless deposition of curved silver patches on silica nanospheres}, volume = {20}, year = {2018} } @inproceedings{faucris.206243012, author = {Klupp Taylor, Robin and Bao, Huixin and Sadafi, Fabrizio-Zagros}, booktitle = {Engineering Sciences and Fundamentals 2013 - Core Programming Area at the 2013 AIChE Annual Meeting: Global Challenges for Engineering a Sustainable Future}, faupublication = {yes}, isbn = {9781634390392}, peerreviewed = {unknown}, publisher = {AIChE}, title = {{Patchy} particles made easy: {Developing} general colloidal approaches to produce anisotropic building blocks for novel functional materials}, url = {https://www.scopus.com/record/display.uri?eid=2-s2.0-84911945180&origin=inward}, volume = {2}, year = {2013} } @article{faucris.111670504, abstract = {Dendrite growth of metal patches on colloidal particles shows a variety of structures depending on the preparation conditions. The morphology of these patches suggests a cross-over from a reaction to a diffusion limited growth, implicating diffusion on the particle surface. Interestingly, the morphological and optical characteristics of the patches continuously change between two limiting behaviors. To understand this growth process, extensive simulations are performed, studying the fractal dimension and the dynamics of growth of a patch on a particle of a finite size, as a function of the initial density and the binding affinity of diffusing tracers. Several important growth regimes are characterized that enable to optimize the pathway for the synthesis of optically active, patchy particles.}, author = {Bihr, Timo and Sadafi, Fabrizio-Zagros and Smith, Ana-Suncana and Klupp Taylor, Robin and Seifert, Udo}, doi = {10.1002/admi.201600310}, faupublication = {yes}, journal = {Advanced Materials Interfaces}, keywords = {LIMITED AGGREGATION; CELL-ADHESION; FRACTAL AGGREGATION; COLLOIDAL SYNTHESIS; NANOSPHERES; DIMENSIONS; SIMULATION; NUCLEATION; PARTICLES; STABILITY}, month = {Jan}, peerreviewed = {Yes}, title = {{Radial} {Growth} in {2D} {Revisited}: {The} {Effect} of {Finite} {Density}, {Binding} {Affinity}, {Reaction} {Rates}, and {Diffusion}}, url = {http://onlinelibrary.wiley.com/doi/10.1002/admi.201600310/full}, volume = {4}, year = {2017} }