吡啶在几种金属纳米线阵列上的表面增强喇曼光谱

近20多年来利用表面增强喇曼光谱（SERS）的研究还仅限于Ag,Au,Cu这三种具有强SERS效应的金属，最近，田中群等利用合适的表面处理方法和共焦曼光谱技术成功地获得了许多无机离子和有机小分子吸附在一系列的过渡金属（如Pt,Ni,Fe,Pd,Rh,Co,Ru等）上的SERS光谱，拓宽了SERS的应用范围，但这些表面处理方法对基底进行处理时存在着较大的随机性，从而导致对所得SERS信号的解释困难。近年来通过自组装膜、模板合成等技术可得比较有序具有强SERS效应的或表面，例如Nie等最近发现尺寸分布狭窄的Ag溶胶粒子（约80－100nm）能诱导出巨大的SERS增强；Freeman和C tffumj m jf rbutb uqf At A 体微粒组装在聚合物基底上，制得高活性的SERS基底，以上工作都表明制备有序纳米级金属颗粒表面将推动SERS的应用和机理研究，迄今，3半导体纳米线阵列上的喇曼光谱已有报道，而利用金属纳米线阵列作为SERS基底除半于样模合成法制备的Ag纳米线阵列上的SERS之外，尚未见其它相关报道，本文主要研究样模合成法制备金属纳米线的过程，并以此为基底研究吡啶吸附的SERS光谱。

Surface-enhanced Raman Scattering of Pyridine Adsorbed on Some Metal Nanowire Arrays

Nanowire arrays of various metals were fabricated from the template of porous alumina. We observed the strong surface enhanced Raman scattering(SERS) signals of the adsorbed molecules such as pyridine not only at the noble metals nanowires that exhibit a high SERS activity, but also at Ni, Co nanowires that are normally considered to be non SERS active substrates. The intensity of the species adsorbed at Ni nanowires is stronger than that on the conventionally roughened metal surface, and depends on the length of the nanowires out of alumina matrix. The metal nanowire arrays can be used as SERS active substrates.