Polyamine-functionalized carbon quantum dots as fluorescent probes for selective and sensitive detection of copper ions.

Abstract

A novel sensing system has been designed for Cu(2+) ion detection based on the quenched fluorescence (FL) signal of branched poly(ethylenimine) (BPEI)-functionalized carbon quantum dots (CQDs). Cu(2+) ions can be captured by the amino groups of the BPEI-CQDs to form an absorbent complex at the surface of CQDs, resulting in a strong quenching of the CQDs' FL… (More)
DOI: 10.1021/ac3012126

Topics

5 Figures and Tables

Cite this paper

@article{Dong2012PolyaminefunctionalizedCQ, title={Polyamine-functionalized carbon quantum dots as fluorescent probes for selective and sensitive detection of copper ions.}, author={Yongqiang Dong and Ruixue Wang and Geli Li and Congqiang Chen and Yuwu Chi and Guonan Chen}, journal={Analytical chemistry}, year={2012}, volume={84 14}, pages={6220-4} }