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Authors
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Steiner, A. M. ; Mayer, M. ; Schletz, D. ; Wolf, D. ; Formanek, P. ; Hübner, R. ; Dulle, M. ; Förster, S. ; König, T. ; Fery, A.
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Title
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Silver particles with rhombicuboctahedral shape and effective isotropic interactions with light
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Date
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19.03.2019
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Number
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56650
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Abstract
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Truly spherical silver nanoparticles are of great importance for fundamental studies including plasmonic applications, but their direct synthesis in aqueous media is not feasible. Using the commonly employed copper-based etching processes, an isotropic plasmonic 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 toward silver rhombicuboctahedra, which is the thermodynamically most stable product of this synthesis. The rhombicuboctahedral morphology is further evidenced by comprehensive characterization with small-angle X-ray scattering in combination with transmission electron microscopy (TEM) tomography and high-resolution TEM. We also 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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Publisher
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Chemistry of Materials
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Wikidata
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Citation
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Chemistry of Materials 31 (2019) 2822-2827
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DOI
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https://doi.org/10.1021/ACS.CHEMMATER.8B05220
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Tags
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