Highly Sensitive SERS Detection of Hg2+ Ions in Aqueous Media Using Gold Nanoparticles/Graphene Heterojunctions

被引：156

作者：

Ding, Xiaofeng ^{[1
,2
]}

Kong, Lingtao ^{[1
]}

Wang, Jin ^{[1
]}

Fang, Fang ^{[1
]}

Li, Dandan ^{[1
]}

Liu, Jinhuai ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Intelligent Machines, Res Ctr Biomimet Funct Mat & Sensing Devices, Hefei 230031, Anhui, Peoples R China

[2] Anhui Univ, Sch Life Sci, Hefei 230039, Anhui, Peoples R China

来源：

ACS APPLIED MATERIALS & INTERFACES | 2013年 / 5卷 / 15期

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

reduced graphene oxide; gold nanoparticles; heterojunctions; SERS; sensor; GRAPHENE OXIDE; MERCURY IONS; NANOSTRUCTURES; EXPOSURE; GROWTH; AG;

D O I：

10.1021/am401373e

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Gold nanoparticles (AuNPs)/reduced graphene oxide (rGO) heterojunctions were synthesized directly on SiO2/Si substrates via a seed-assisted growth process. The in situ chemical fabrication strategy has been proven to be quite simple and efficient for generating highly active surface-enhanced Raman scattering (SERS) substrates due to synergistic enhanced protocol from rGO and AuNPs. The SERS substrates with AuNPs/rGO heterojunctions have been utilized for trace analysis of mercury(II) ions via thymine-Hg2+-thymine coordination. Thereby, very low limits of detection, i.e., 0.1 nM or 20 ppt for Hg2+, can be achieved in contrast with some other SERS subsrtates, which suggests that the heterojunctions are appropriate as versatile surface-enhanced substrates applied in chemical sensing or biosensing.

引用

页码：7072 / 7078

页数：7

共 48 条

[1] CHARGE-TRANSFER EFFECTS IN SURFACE-ENHANCED RAMAN-SCATTERING [J].