用于增强等离子体驱动表面增强拉曼散射的金-银合金空心纳米链的自组装

Self-Assembly of Au-Ag Alloy Hollow Nanochains for Enhanced Plasmon-Driven Surface-Enhanced Raman Scattering.

作者信息

Liu Weiyan, Zhang Jianwen, Hou Juan, Aziguli Haibibu, Zhang Qiming, Jiang Hu

机构信息

Key Laboratory of Ecophysics, Department of Physics, College of Science, Shihezi University, Xinjiang 832003, China.

Key Laboratory of Oasis Town and Mountain-basin System Ecology of Xinjiang Bingtuan, Shihezi University, Xinjiang 832003, China.

出版信息

Nanomaterials (Basel). 2022 Apr 7;12(8):1244. doi: 10.3390/nano12081244.

DOI:10.3390/nano12081244

PMID:35457952

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9025440/

Abstract

In this paper, Au-Ag alloy hollow nanochains (HNCs) were successfully prepared by a template-free self-assembly method achieved by partial substitution of ligands. The obtained Au-Ag alloy HNCs exhibit stronger enhancement as surface-enhanced Raman scattering (SERS) substrates than Au-Ag alloy hollow nanoparticles (HNPs) and Au nanochains substrates with an intensity ratio of about 1.3:1:1. Finite difference time domain (FDTD) simulations show that the SERS enhancement of Au-Ag alloy HNCs substrates is produced by a synergistic effect between the plasmon hybridization effect associated with the unique alloy hollow structure and the strong "hot spot" in the interstitial regions of the nanochains.

摘要

在本文中，通过配体部分取代实现的无模板自组装方法成功制备了金-银合金中空纳米链（HNCs）。所获得的金-银合金HNCs作为表面增强拉曼散射（SERS）基底，比金-银合金中空纳米颗粒（HNPs）和金纳米链基底表现出更强的增强效果，强度比约为1.3:1:1。时域有限差分（FDTD）模拟表明，金-银合金HNCs基底的SERS增强是由与独特合金中空结构相关的等离子体杂化效应和纳米链间隙区域中的强“热点”之间的协同效应产生的。