Silver particles with rhombicuboctahedral shape and effectively isotropic interactions with light

Anja Maria Steiner; Martin Mayer; Daniel Schletz; Daniel Wolf; Petr Formanek; René Hübner; Martin Dulle; Stephan Förster; Tobias A. F. König; Andreas Fery

doi:10.1021/acs.chemmater.8b05220

arXiv · 1910.07764

Silver particles with rhombicuboctahedral shape and effectively isotropic interactions with light

Anja Maria Steiner·Martin Mayer·Daniel Schletz·Daniel Wolf·Petr Formanek·René Hübner·Martin Dulle·Stephan Förster·Tobias A. F. König·Andreas Fery

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Abstract

Truly spherical silver nanoparticles are of great importance for fundamental studies including plasmonic applications, but the direct synthesis in aqueous media is not feasible. Using the commonly employed copper-based etching processes, isotropicplasmonic response can be achieved by etching well-defined silver nanocubes. Whilst spherical like shape is typically prevailing in such processes, we established that there is a preferential growth towards silver rhombicuboctahedra (AgRCOs), which is thethermodynamically most stable product of this synthesis. The rhombicuboctahedral morphology is further evidenced by comprehensive characterization with small-angle X-ray scattering in combination with TEM tomographyand high resolution TEM. Wealso elucidate the complete reaction mechanism based on UV-Vis kinetic studies, and the postulated mechanism can also be extended to all copper-based etching processes.

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Anja Maria Steiner, Martin Mayer, Daniel Schletz, Daniel Wolf, Petr Formanek, René Hübner, Martin Dulle, Stephan Förster, Tobias A. F. König, Andreas Fery. 2019-10-17. Silver particles with rhombicuboctahedral shape and effectively isotropic interactions with light. https://doi.org/10.1021/acs.chemmater.8b05220

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