Nanogaps in 2D Ag‐nanocap arrays for surface‐enhanced Raman scattering
Nanogaps in 2D Ag‐nanocap arrays for surface‐enhanced Raman scattering
复制标题
DOI：
10.1002/jrs.4390
复制
发表时间：
2013-12
影响因子：
2.5
通讯作者：
Yongjun Zhang;Wenting Gao;Shuo Yang;S. S. Liu-S.;Xiaoyu Zhao;M. Gao;Yaxin Wang;Jinghai Yang
中科院分区：
文献类型：
--
作者：
Yongjun Zhang;Wenting Gao;Shuo Yang;S. S. Liu-S.;Xiaoyu Zhao;M. Gao;Yaxin Wang;Jinghai Yang
通过在二维聚苯乙烯胶体纳米球模板上沉积银膜，制备了银-银纳米帽阵列的表面增强拉曼散射基底。当原始的胶体阵列被用作银沉积的基底时，表面增强拉曼散射（Sers）增强表现出强烈的尺寸依赖性行为。当O-2-等离子体蚀刻的2D聚苯乙烯模板用作Ag沉积的基底以形成纳米间隙时，相邻Ag纳米间隙之间的差距尺寸从5至20 nm产生甚至更大的Sers增强。当沉积SiO2覆盖层以将Ag纳米帽与邻居隔离时，Sers信号增强得更多。这种明显的表面Sers效应是由于银纳米帽之间的耦合受距离的控制，增强了局域电场强度。版权所有（c）2013约翰威利父子有限公司
The surface-enhanced Raman scattering substrate of Ag-Ag nanocap arrays are prepared by depositing Ag film onto two-dimensional (2D) polystyrene colloidal nanosphere templates. When the original colloidal arrays are used as the substrate for Ag deposition, surface-enhanced Raman scattering (SERS) enhancements show the strong size-dependence behaviours. When O-2-plasma etched 2D polystyrene templates are used as the substrate for Ag deposition to form nanogaps, the gap sizes between adjacent Ag nanocaps from 5 to 20nm generate even greater SERS enhancements. When SiO2 coverage is deposited to isolate the Ag nanocaps from the neighbours, the SERS signals are enhanced more. The significant SERS effects are due to the coupling between Ag nanocaps controlled by the distance, which enhances the local electric-field intensity. Copyright (c) 2013 John Wiley & Sons, Ltd.