用于表面增强拉曼光谱观察的蜂巢状银纳米腔阵列：基于等离子体介导的化学反应

Honeycomb-like Ag Nanocavity Array for SERS Observations Using Plasmon-Mediated Chemical Reactions.

作者信息

Zhang Yongjun, Xu Zhen, Wen Jiahong, Zhao Xiaoyu, Gao Renxian, Wang Yaxin

机构信息

School of Material and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, China.

The College of Electronics and Information, Hangzhou Dianzi University, Hangzhou 310018, China.

出版信息

Micromachines (Basel). 2023 Sep 22;14(10):1811. doi: 10.3390/mi14101811.

DOI:10.3390/mi14101811

PMID:37893248

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10609216/

Abstract

Organized two-dimensional polystyrene bead arrays perform ion etching, and protruding nanostructures are created on polystyrene beads due to the shadow effects from the ring beads, leading to nucleus selection and growth in Au nanostructure deposition. Ag nanostructures are prepared via plasmon-mediated chemical reactions (PMCRs), leading to the Ag nanocavity geometry of the honeycomb pattern when the etching time and Ag growth time are tuned. Due to the strong electromagnetic coupling, the Ag honeycomb-shaped nanocavity array works as the SERS substrate with high sensitivity and good repeatability, which is used to detect thiram pesticide residues with a concentration down to 10 M.

摘要

有序二维聚苯乙烯珠阵列进行离子蚀刻，由于环形珠的阴影效应，聚苯乙烯珠上形成突出的纳米结构，从而在金纳米结构沉积中导致核的选择和生长。通过等离子体介导的化学反应（PMCRs）制备银纳米结构，当调整蚀刻时间和银生长时间时，会形成蜂窝状图案的银纳米腔几何结构。由于强电磁耦合，银蜂窝状纳米腔阵列作为具有高灵敏度和良好重复性的表面增强拉曼散射（SERS）基底，用于检测浓度低至10 M的福美双农药残留。