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Article | Open Access

Au-Ag Gradient Alloy Nanoparticles with Extended Surface Plasmon Resonance Wavelength: Synthesis via Microreaction

Li Sun1, Weiling Luan1( ), Shan-tung Tu1, Yue Jin Shan2
The Key Laboratory of Safety Science of Pressurized System (MOE), School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai 200237, China
Department of Applied Chemistry, Faculty of Engineering, Utsunomiya University, 7-1-2 Yoto, Utsunomiya 321-8585, Japan
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Abstract

Au-Ag gradient alloy nanoparticles were directly synthesized in a microreaction system with their surface plasmon resonance been facilely adjusted. The surface plasmon resonance wavelength was red-shifted through increasing the raw ratio of Au3+:Ag+, decreasing the synthesis temperature or the residence time. A linear relationship was found between the surface plasmon resonance wavelength and the synthesis temperature, or the residence time. The range of surface plasmon resonance wavelength of monodispersed Au-Ag gradient alloy could be extended to 548 nm generated on the enrichment of Au as outer layer. It provided a suitable way to prepare Au-Ag gradient alloy NPs with longer surface plasmon resonance wavelength than 520 nm (Au) at low temperature.

Keywords

nanoparticlessurface plasmon resonanceAu-Aggradient alloymicroreaction systemwavelength shift

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Nano Biomedicine and Engineering
Volume 3 Issue 4,
December 2011
Pages 232-235
DOI: 10.5101/nbe.v3i4.p232-235
Cite this article:
Sun L, Luan W, Tu S-t, et al. Au-Ag Gradient Alloy Nanoparticles with Extended Surface Plasmon Resonance Wavelength: Synthesis via Microreaction. Nano Biomedicine and Engineering, 2011, 3(4): 232-235. https://doi.org/10.5101/nbe.v3i4.p232-235

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Published: 31 December 2011
© 2011 L. Sun, et al.

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
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