Diamine-linked array of metal (Au, Ag) nanoparticles on glass substrates for reliable surface-enhanced Raman scattering (SERS) measurements

被引：18

作者：

Bu, Yanru ^{[1
]}

Park, Sang Joon ^{[1
]}

Lee, Sang-Wha ^{[1
]}

机构：

[1] Gachon Univ, Dept Chem & Biochem Engn, Songnam, Gyeonggi Do, South Korea

来源：

CURRENT APPLIED PHYSICS | 2014年 / 14卷 / 05期

基金：

新加坡国家研究基金会;

关键词：

Au; Ag; Diamines; Chain length; SERS; COLLOID MONOLAYERS; OPTICAL-PROPERTIES; PLASMON RESONANCE; AMINO-ACIDS; GOLD; SHELL; CLUSTERS;

D O I：

10.1016/j.cap.2014.03.008

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Metal (Au, Ag) nanoparticles (M NPs) (ca. 30-40 nm) prepared by citrate reduction method were arrayed on amine-terminated glass substrates using diamine linkers with different chain lengths. 1,4-diaminobutane (C-4 diamine) produced the uniform and densely-packed array of M NPs on glass substrates at appropriate concentration ranges, whereas diamine linkers with longer chain lengths (C-8 and C-12 diamines) produced more heterogeneous and aggregated array of M NPs. When compared to Ag NPs, Au NPs demonstrated more controllable and higher packing density due to their mono-dispersed size and higher affinity to diamine linkers. Uniformly arrayed M NPs (Au, Ag) on glass substrates exhibited high enhancement factors in SERS measurements of o-chlorothiophenol probes. Au NPs arrayed substrates exhibited an approximate power-law linearity of Raman intensity with probe concentrations (from 10(-7) M to 10(-4) M), demonstrating more reliable SERS substrates than Ag arrayed substrates with higher SERS activity. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：784 / 789

页数：6