银纳米帽阵列的调控及其表面增强拉曼散射特性研究
首发时间:2010-07-23
摘要:本文利用高度有序表面具有突起结构的多孔氧化铝作为模板,通过控制制备氧化铝模板的电压与反应时间来调控氧化铝表面有序突触的形貌与排列,其后采用磁控溅射技术将银沉积在氧化铝突触上形成梅花状分布帽状银纳米结构,该银纳米帽阵列可用作表面增强拉曼散射活性衬底材料。我们采用rhodamine 6G为探针分子,比较分析了不同制备参数下基底的拉曼活性,获得最有利于拉曼散射信号增强的调控参数。该表面增强拉曼散射活性基底可用于多壁碳纳米管的痕量分析。
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Controlled assembly of highly Raman-enhancing silver nanocap arrays
Abstract:A convenient nanoscale technique is reported for the fabrication of highly ordered hemispherical silver nanocap arrays templated by porous anodic alumina (PAA) membranes as robust and cost-efficient surface-enhanced Raman scattering substrates. The surface structure can be tuned further to optimize the enhancement factor according to optional PAA fabrication and silver deposition parameters. A brief analytical methodology to evaluate dispersity of adsorbed multiwalled carbon nanotubes with different ultra-low concentrations by 2D point-by-point Raman mapping is proposed.
Keywords: optics surface-enhanced Raman scattering template synthesis
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