Facile synthesis of cysteine-functionalized graphene quantum dots for a fluorescence probe for mercury ions

被引：43
|
作者：
Tran Van Tam [1 ]
Hong, Soon Ho [1 ]
Choi, Won Mook [1 ]
机构：
[1] Univ Ulsan, Sch Chem Engn, Ulsan 680749, South Korea
来源：
RSC ADVANCES | 2015年 / 5卷 / 118期
基金：
新加坡国家研究基金会;
关键词：
OXIDE; BLUE; CHEMISTRY; COVALENT;
D O I：
10.1039/c5ra18495a
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Cystenine-functionalized graphene quantum dots (cys-GQDs) were synthesized by a simple and facile method, which involves chemical bond formation between L-cysteine and the graphene quantum dots (GQDs) prepared by the carbonization of citric acid. The obtained cys-GQDs show a strong green fluorescence and a uniform lateral size distribution with high crystallinity. The cys-GQDs are further demonstrated as highly sensitive and selective fluorescence probes for Hg2+. In the Hg2+ detection process, the cys-GQDs shows significant fluorescence quenching through a charge transfer process within the cys-GQDs and Hg2+ complex.
引用
收藏
页码：97598 / 97603
页数：6
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