Authors
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Mayer, M. ; Steiner, A. M. ; Röder, F. ; Formanek, P. ; König, T. ; Fery, A.
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Title
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Aqueous gold overgrowth of silver nanoparticles: Merging the plasmonic properties of silver with the functionality of gold
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Date
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11.12.2017
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Number
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53903
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Abstract
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To date, it has not been possible to combine the high optical quality of silver particles with good chemical stability and synthetic convenience in a fully aqueous system, while simultaneously allowing chemical surface functionalization. We present a synthetic pathway for future developments in information, energy and medical technology where strong optical/electronic properties are crucial. Therefore, the advantages inherent to gold are fused with the plasmonic properties of silver in a fully aqueous Au/Ag/Au core-shell-shell system. These nanoparticles inherit low dispersity from their masked gold cores, yet simultaneously exhibit the strong plasmonic properties of silver. Protecting the silver surface with a sub-skin depth gold layer enables oxidant stability and functionality without altering the Ag-controlled optical properties. This combines both worlds - optical quality and chemical stability - and furthermore it is not limited to a specific particle shape.
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Publisher
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Angewandte Chemie
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Wikidata
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Citation
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Angewandte Chemie 129 (2017) 16082-16086
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DOI
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https://doi.org/10.1002/ange.201708398
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Tags
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