Integrate silver colloids with silicon nanowire arrays for surface-enhanced Raman scattering

被引：9
|
作者：
Wu, Yongkuan [1 ]
Liu, Kun [1 ]
Li, Xufeng [1 ]
Pan, Shi [1 ]
机构：
[1] Dalian Univ Technol, Sch Phys & Optoelect Technol, Dalian 116023, Peoples R China
来源：
NANOTECHNOLOGY | 2011年 / 22卷 / 21期
关键词：
PLASMON RESONANCE; DIFFERENT SHAPES; POROUS SILICON; NANOPARTICLES; SPECTROSCOPY; MOLECULES;
D O I：
10.1088/0957-4484/22/21/215701
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
A facile method to prepare uniform and reproducible surface-enhanced Raman scattering (SERS) substrates is presented. Quasi-spherical silver colloids prepared by microwave heating and wafer-scale uniform silicon nanowire (SiNW) arrays fabricated via wet chemical etching were united together as SERS substrates. The novel SERS substrates displayed stronger Raman enhancement than conventional silver colloids as well as outstanding uniformity and reproducibility in our experiments. In addition, it was found that the cross section of SiNW arrays possessed stronger enhancement activity than the front side. The enhancement effects of two adjacent SiNWs (as a simplification of SiNW arrays) were evaluated by the finite difference time domain (FDTD) method.
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页数：6
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