Understanding the Photoluminescence Mechanism of Nitrogen-Doped Carbon Dots by Selective Interaction with Copper Ions

被引：63
|
作者：
Ganiga, Manjunatha [1 ]
Cyriac, Jobin [1 ]
机构：
[1] Indian Inst Space Sci & Technol, Dept Chem, Thiruvananthapuram 695547, Kerala, India
来源：
CHEMPHYSCHEM | 2016年 / 17卷 / 15期
关键词：
carbon nanodots; copper; nitrogen; photoluminescence; sensors; GRAPHENE-QUANTUM-DOTS; TUNABLE LUMINESCENCE PROPERTIES; ONE-POT SYNTHESIS; FLUORESCENT-PROBES; GREEN SYNTHESIS; METAL-IONS; CU2+ IONS; NANODOTS; RICH; NANOPARTICLES;
D O I：
10.1002/cphc.201600294
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Doped fluorescent carbon dots (CDs) have drawn widespread attention because of their diverse applications and attractive properties. The present report focusses on the origin of photoluminescence in nitrogen-doped CDs (NCDs), which is unraveled by the interaction with Cu2+ ions. Detailed spectroscopic and microscopic studies reveal that the broad steady-state photoluminescence emission of the NCDs originates from the direct recombination of excitons (high energy) and the involvement of defect states (low energy). In addition, highly selective detection of Cu2+ is achieved, with a detection limit of 10m and a dynamic range of 10m-0.4mm. The feasibility of the present sensor for the detection of Cu2+ in real water samples is also presented.
引用
收藏
页码：2315 / 2321
页数：7
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