Fabrication of hexagonally patterned flower-like silver particle arrays as surface-enhanced Raman scattering substrates.
Fabrication of hexagonally patterned flower-like silver particle arrays as surface-enhanced Raman scattering substrates.
复制标题
六角形图案花状银颗粒阵列作为表面增强拉曼散射基底的制造
DOI：
10.1088/0957-4484/27/32/325303
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发表时间：
2016-08-12
期刊：
影响因子：
3.5
通讯作者：
Wu N
中科院分区：
文献类型：
--
作者：
Tang H;Zheng P;Meng G;Li Z;Zhu C;Han F;Ke Y;Wang Z;Zhou F;Wu N
等离子体纳米结构的分级组装可以诱导高的表面增强拉曼散射（Sers）活性。然而，将分层纳米结构均匀分散到平面基底上以实现Sers信号再现性是一个挑战。本文提出了一种简单的制备六角形花状银颗粒阵列作为Sers基底的方法。首先，在阳极氧化铝模板的孔中模压出表面光滑的六方有序银半球阵列。然后将银纳米片电沉积到各个银半球的表面上。相邻纳米片之间的众多纳米边缘和纳米间隙产生大量热点，导致在更大面积的芯片上的高Sers活性。采用银花状阵列作为Sers基底，可以检测0.1 nM罗丹明6 G和1 μM 3，3 '，4，4'-四氯联苯（PCB-77，一种持久性有机污染物）。
Hierarchical assembly of plasmonic nanostructures can induce high surface-enhanced Raman scattering (SERS) activity. However, it is a challenge to uniformly disperse the hierarchical nanostructures onto a planar substrate to achieve SERS signal reproducibility. This report presents a facile route to fabricate a hexagonally patterned flower-like silver particle array as the SERS substrate. First, hexagonally ordered silver hemisphere arrays with smooth surface are molded in the pores of an anodic aluminum oxide template. Ag-nanosheets are then electrodeposited onto the surface of individual silver hemispheres. The numerous nano-edges and nano-gaps between adjacent nanosheets render a large number of hot spots, leading to high SERS activity over a larger area of chip. The silver flower-like array is employed as the SERS substrate, which is able to detect 0.1 nM rhodamine 6 G and 1 μM 3,3’,4,4’-tetrachlorobiphenyl (PCB-77, a persistent organic pollutant).