双金属片
材料科学
拉曼散射
拉曼光谱
激光器
纳米结构
表面增强拉曼光谱
基质(水族馆)
光谱学
纳米晶
光学
散射
光化学
金属
纳米技术
光电子学
化学
物理
地质学
海洋学
冶金
量子力学
作者
Linlin Xu,Shuang Li,Hua Zhang,Dameng Wang,Ming Chen
出处
期刊:Optics Express
[The Optical Society]
日期:2017-03-22
卷期号:25 (7): 7408-7408
被引量:35
摘要
The project of wielding laser light as a versatile tool for sculpting branched Ag@Au bimetallic nanocrystals with mean size of ~50 nm has been developed in this work. The moderate overgrowth of Ag species with negligible damage effect on the branched Ag@Au nanostructures was achieved by laser-induced photo-oxidation. The final Ag@Au nanodendrites exhibit superior surface enhanced Raman scattering (SERS) activities with an enhancement factor up to ~1011 and a detection limit as low as ~10-14 M. The pronounced feature should be attributed to the noticeable small-sized branches (<10 nm) and unique pronounced inter-metallic synergies. Our results have a promising potential for developing SERS-based ultrasensitive probes in biomedical application.
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