Design of Hybrid Nanostructural Arrays to Manipulate SERS-Active Substrates by Nanosphere Lithography
Design of Hybrid Nanostructural Arrays to Manipulate SERS-Active Substrates by Nanosphere Lithography
复制标题
通过纳米球光刻操作 SERS 活性基底的混合纳米结构阵列设计
DOI：
10.1021/acsami.6b14008
复制
发表时间：
2017
影响因子：
9.5
通讯作者：
Dut Youwei
中科院分区：
文献类型：
--
作者：
Zhao Xiaoyu;Wen Jiahong;Zhang Mengning;Wang Dunhui;Chen Yaxin Wang Lei;Chen Lei;Zhang Yongjun;Yang Jinghai;Dut Youwei
利用一种易于操作和低成本的方法，可控地制备具有高密度表面增强拉曼散射（SERS）活性区域（热点）的纳米图阵列作为表面增强拉曼散射（SERS）活性衬底。采用磁控溅射和等离子体刻蚀相结合的方法制备了一种由纳米帽和纳米三角形组成的混合银阵列。通过调整聚苯乙烯（PS）胶体球阵列在银纳米碗中的刻蚀时间，可以很容易地控制阵列的形貌，从而控制热点的形成和分布。实验结果表明，混合纳米结构阵列具有较大的增强因子，估计是纳米帽阵列的7倍，纳米环和纳米颗粒阵列的3倍。时域有限差分仿真结果表明，该阵列优越的SERS性能主要归功于高密度的热点和增强的电磁场。
An easy-handling and low-cost method is utilized to controllably fabricate nanopattern arrays as the surface-enhanced Raman scattering (SERS) active substrates with high density of SERS-active areas (hot spots). A hybrid silver array of nanocaps and nanotriangles are prepared by combining magnetron sputtering and plasma etching. By adjusting the etching time of polystyrene (PS) colloid spheres array in silver nanobowls, the morphology of the arrays can be easily manipulated to control the formation and distribution of hot spots. The experimental results show that the hybrid nanostructural arrays have large enhancement factor, which is estimated to be seven times larger than that in the array of nanocaps and three times larger than that in the array of nanorings and nanoparticles. According to the results of finite-difference time-domain simulation, the excellent SERS performance of this array is ascribed to the high density of hot spots and enhanced electromagnetic field.