Controlled Assembly of Highly Raman-Enhancing Silver Nanocap Arrays Templated by Porous Anodic Alumina Membranes
Controlled Assembly of Highly Raman-Enhancing Silver Nanocap Arrays Templated by Porous Anodic Alumina Membranes
复制标题
以多孔阳极氧化铝膜为模板的高拉曼增强银纳米帽阵列的受控组装
DOI：
10.1002/smll.200900577
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发表时间：
2009-10-16
期刊：
影响因子：
13.3
通讯作者：
Chu, Paul K.
中科院分区：
文献类型：
--
作者：
Qiu, Teng;Zhang, Wenjun;Chu, Paul K.
报道了一种方便的纳米尺度技术，用于制备高度有序的半球形银纳米帽阵列，该阵列以多孔阳极氧化铝（PAA）膜为模板，作为鲁棒且具有成本效益的表面增强拉曼散射（Sers）基底。这种几何形状由于其周期性六边形排列和在亚10 nm范围内控制纳米结构之间的差距而产生高拉曼信号。表面结构可以根据可选的PAA制造和银沉积参数进一步调整以优化增强因子。时域差分计算结果表明，该结构可能具有良好的Sers特性，由于高密度和丰富的热点。
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 (SERS) substrates. This geometry produces a high Raman signal due to its periodic hexagonal arrangements and control of the gap between the nanostructures in the sub-10-nm regime. The surface structure can be tuned further to optimize the enhancement factor according to optional PAA fabrication and silver deposition parameters. Finite-difference time-domain calculations indicate that the structure may possess excellent SERS characteristics due to the high density and abundance of hot spots.