期刊
JOURNAL OF PHYSICAL CHEMISTRY C
卷 114, 期 23, 页码 10417-10423出版社
AMER CHEMICAL SOC
DOI: 10.1021/jp102519n
关键词
-
资金
- Spanish Ministerio de Ciencia e Innovacion [MAT2007-62696, MAT2008-05755, CSD2006-12 NANOBIOMED]
- INL
- RyC (MEC, Spain)
We describe the modulation of localized surface plasmons in gold nanodumbbells through stepwise silver coating, along with a detailed discussion regarding the experimental parameters affecting the final core shell morphology. Interestingly, whereas conformal growth was observed for thin coatings, for intermediate and high silver salt concentrations, the final nanoparticles end up with either rod-like or irregular faceted morphologies as a consequence of anisotropic silver growth. Upon silver reduction, pronounced changes in the optical properties were observed, which could be modeled using the boundary element method (BEM), which also allowed the assignment of different plasmon modes. Such core shell Au@Ag nanoparticles are expected to serve as excellent SERS substrates, as significantly higher enhancement factors are expected for silver as compared to gold. Optical enhancing properties for SERS were tested with two laser lines, evidencing significantly larger enhancement factors for the bimetallic nanoparticles, as compared to those of gold.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据