Tuning the surface enhanced Raman scattering activity of gold nanocubes by silver coating
作者： Shu-Jun Ding , Jian Zhu
DOI: 10.1016/J.APSUSC.2015.09.077
关键词: Rhodamine 6G 、 Nanostructure 、 Bimetallic strip 、 Nanoshell 、 Silver nitrate 、 Materials science 、 Nanotechnology 、 Colloidal gold 、 Raman spectroscopy 、 Raman scattering
摘要: Abstract Colloidal gold nanocubes coated with a silver nanoshell have been synthesized via the seed mediated growth method. By changing volume of and nitrate, both edge length nanocube thickness shell could be fine-tuned. The surface-enhanced Raman scattering (SERS) activity these core–shell structural Au–Ag bimetallic has also investigated by using rhodamine 6G (R6G) as active probe. It found SERS silver-coated greatly depends on their geometry factors. decreasing or increasing coating thickness, enhanced. comparing other bands R6G, enhancement peak corresponding to C ring in-plane vibration mode is more sensitive geometries nanostructure. These improved properties provide potential application for biologic chemical sensing based spectroanalysis.
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