Gold nanoparticles-decorated single silver nanowire as an efficient SERS-active substrate  

作　　者：谭恩忠 

机构地区：[1]Department of Mathematics and Physics Beijing Institute of Petrochemical Technology

出　　处：《Optoelectronics Letters》2014年第4期241-243,共3页光电子快报（英文版）

基　　金：the BIPT Breeding Project of Outstanding Young Teachers Management Backbone 2013;General Program of Science and Technology Development Project of Beijing Municipal Education Commission(No.Z14-007)

摘　　要：A novel surface-enhanced Raman scattering(SERS)-active substrate based on Au nanoparticles(AuNPs)-coated silver nanowire(AgNW) is obtained by an effective and simple method. The results show that the hybrid structures prepared by this method are powerful SERS-active substrates for the detection of malachite green(MG) molecules with the limit of 1 nmol/L. The excellent enhancing ability mainly comes from two kinds of hot spots. One is from the gaps among the adjacent AuNPs, and the other is the presence of zone between AuNPs and AgNW. In particular, the AuNPs-coated AgNW can be viewed through the objective of the confocal Raman spectrometer due to the length of the AgNW reaches microns, which can improve the repeatability of detection. Moreover, it is of great significance in research of SERS mechanism and application.A novel surface-enhanced Raman scattering （SERS）-active substrate based on Au nanoparticles （AuNPs）-coated silver nanowire （AgNW） is obtained by an effective and simple method. The results show that the hybrid structures prepared by this method are powerful SERS-active substrates for the detection of malachite green （MG） molecules with the limit of 1 nmol/L. The excellent enhancing, ability mainly comes from two kinds of hot spots. One is from the gaps among the adjacent AuNPs, and the other is the presence of zone between AuNPs and AgNW. In particular, the AuNPs-coated AgNW can be viewed through the objective of the confocal Raman spectrometer due to the length of the AgNW reaches microns, which can improve the repeatability of detection. Moreover, it is of great significance in research of SERS mechanism and application.

关 键 词：SERS活性 金纳米粒子 银纳米线 表面增强拉曼散射 基底 装饰 拉曼光谱仪 孔雀石绿 

分 类 号：TB383.1[一般工业技术—材料科学与工程]