用于高效表面增强拉曼散射的金纳米粒子阵列的简易制备

Facile fabrication of gold nanoparticle arrays for efficient surface-enhanced Raman scattering.

作者信息

Wang Yuling, Chen Hongjun, Wang Erkang

机构信息

State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Science, Graduate School of the Chinese Academy of Sciences, Changchun, Jilin 130022, People's Republic of China.

出版信息

Nanotechnology. 2008 Mar 12;19(10):105604. doi: 10.1088/0957-4484/19/10/105604. Epub 2008 Feb 14.

DOI:10.1088/0957-4484/19/10/105604

PMID:21817706

Abstract

An effective and facile method for the fabrication of a surface-enhanced Raman scattering (SERS)-active film with closely packed gold nanoparticle (AuNP) arrays is proposed by self-assembly of different sizes (16, 25, 40 and 70 nm) of AuNPs at a toluene/water interface with ethanol as the inducer. The as-prepared AuNP arrays exhibit efficient Raman scattering enhancement, and the enhancement factors estimated using p-aminothiophenol as a probe molecule range from 10(5) to 10(7). This is attributed to the coupling electromagnetic SERS enhancement mechanism with additional localization field within closely packed AuNPs, which have greater SERS activity and reproducibility than that on aggregates and on self-assembled monolayers of isolated AuNPs on glass.

摘要

提出了一种有效且简便的方法来制备具有紧密排列金纳米颗粒（AuNP）阵列的表面增强拉曼散射（SERS）活性薄膜，该方法通过在甲苯/水界面以乙醇为诱导剂自组装不同尺寸（16、25、40和70纳米）的AuNP来实现。所制备的AuNP阵列表现出高效的拉曼散射增强，使用对氨基硫酚作为探针分子估算的增强因子范围为10⁵至10⁷。这归因于耦合电磁SERS增强机制以及紧密排列的AuNP内的额外局域场，其比玻璃上孤立AuNP的聚集体和自组装单分子层具有更高的SERS活性和重现性。