Berlin 2018 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 29: Nanostructures, Nanostructuring and Nanosized Soft Matter I
CPP 29.1: Vortrag
Dienstag, 13. März 2018, 11:15–11:30, C 230
Strain-induced formation of oriented plasmonic oligomers on elastomeric substrate — •Anja Maria Steiner1,2, Martin mayer1,2, Maximilian Seuss1, Svetoslav Nikolov3, Alexander Alexeev3, Christian Kuttner1,2, Tobias A.F. König1,2, and Andreas Fery1,2,4 — 1Leibniz-Institut für Polymerforschung Dresden e.V., Germany — 2Centre for Advancing Electronics Dresden, Germany — 3Georgia Tech, Atlanta, United States — 4Department of Physical Chemistry of Polymeric Materials, TU Dresden, Germany
We present the formation of oriented chains of few plasmonic nanoparticles,so called plasmonic oligomers, by controlled fragmentation of linear particle assemblies into finite sub-chains. Detailed investigations of the fragmentation process are conducted by in-situ atomic force microscopy (AFM) and correlated to UV-vis-NIR spectroscopy. By evaluation of the strain dependent optical properties we found a reversible, non-linear shift of the dominant plasmonic resonance. Based on the AFM measurements, the optical evaluation and mechanical modeling (lattice spring method), we prove a formation mechanism which provides experimental guiding lines. Following this strain-dependent fragmentation
mechanism the chain length can be controlled depending on the ratio of cohesion between the particles and adhesion of the colloids to the supporting elastomeric substrate. We demonstrate, that mechanical stimulus is a powerful tool for the scalable fabrication of oriented linear plasmonic oligomers and opens new avenues for straindependent optical devises and mechanoplasmonic applications.
A.M. Steiner et al.,ACS Nano, 2017, 11, 8871–8880