The DOI matches its Crossref record; 24 of the 24 references it cites were found in a registry or an index.
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 via an inner filter effect. Herein, we have demonstrated that this facile methodology can offer a rapid, reliable, and selective detection of Cu(2+) with a detection limit as low as 6 nM and a dynamic range from 10 to 1100 nM. Furthermore, the detection results for Cu(2+) ions in a river water sample obtained by this sensing system agreed well with that by inductively couple plasma mass spectrometry, suggesting the potential application of this sensing system.
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Metadata
- Authors
- Dong, Y., Wang, R., Li, G., Chen, C., Chi, Y., & Chen, G.
- Venue
- Analytical Chemistry
- Publisher
- American Chemical Society (ACS)
- Published
- 2012-06-25
- Volume
- 84
- Issue
- 14
- Pages
- 6220-6224
- ISSN
- 0003-2700 (ISSN-L)
- 1520-6882
- OpenAlex
- W2035516583
- Cited by
- 991
- References
- 24
- FWCI
- 27.51
- Type
- journal article
- Language
- en
- Open access
- closed
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