期刊
CHEMISTRY-A EUROPEAN JOURNAL
卷 19, 期 40, 页码 13362-13368出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201302268
关键词
amination; copper; fluorescence; graphene; quantum dots
资金
- 973 project [2011CB936004, 2012CB720602]
- NSFC [21210002, 91213302]
Herein, we report a new kind of highly fluorescent probe for Cu2+ sensing generated by hydrothermal treatment of graphene quantum dots (GQDs). After hydrothermal treatment in ammonia, the greenish-yellow fluorescent GQDs (gGQDs) with a low quantum yield (QY, 2.5%) are converted to amino-functionalized GQDs (afGQDs) with a high QY (16.4%). Due to the fact that Cu2+ ions have a higher binding affinity and faster chelating kinetics with N and O on the surface of afGQDs than other transition-metal ions, the selectivity of afGQDs for Cu2+ is much higher than that of gGQDs. Furthermore, afGQDs are biocompatible and eco-friendly, and the afGQDs with a positive charge can be easily taken up by cells, which makes it possible to sense Cu2+ in living cells. The strategy presented here is simple in design, economical, and offers a mix-and-detect protocol without dye-modified oligonucleotides or complex chemical modification.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据