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Gold Coating of Silver Nanoprisms
Nanyang Technology University.
Nanyang Technology University.
Nanyang Technology University.
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2012 (English)In: Advanced Functional Materials, ISSN 1616-301X, E-ISSN 1616-3028, Vol. 22, no 4, 849-854 p.Article in journal (Refereed) Published
Abstract [en]

Coreshell Ag@Au nanoprisms are prepared through a surfactant-free seed-mediated approach by taking advantage of the anisotropic structure of silver nanoprisms as seeds. The gold coating on the silver nanoprism surface is achieved by using hydroxylamine as a mild reducing agent, and the final fully gold-coated prism structures are confirmed by microscopic and spectroscopic characterization. The resulting Ag@Au coreshell structure preserves the optical signatures of nanoprisms and offers versatile functionality and particularly better stability against oxidation than the bare silver nanoprism. The surface plasmon resonances of the coreshell Ag@Au nanoprisms can be tuned throughout the visible and near-IR range as a function of the Au shell thickness. Such tailorable optical features and surfactant-free gold shells have great potential applications in biosensing and bioimaging.

Place, publisher, year, edition, pages
Wiley-VCH Verlag Berlin , 2012. Vol. 22, no 4, 849-854 p.
Keyword [en]
surface plasmon resonance, seed mediation, core-shell, galvanic replacement, nanoparticles
National Category
Engineering and Technology
URN: urn:nbn:se:liu:diva-76813DOI: 10.1002/adfm.201102028ISI: 000300447500022OAI: diva2:516822

Funding Agencies|NTU||CRP|NRF-CRP5-2009-04|NRF Singapore||

Available from: 2012-04-20 Created: 2012-04-20 Last updated: 2014-10-08Bibliographically approved

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Martinsson, ErikAili, DanielLiedberg, Bo
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