1. Green synthesis of carbon dots with down- and up-conversion fluorescent properties for sensitive detection of hypochlorite with a dual-readout assay.
- Author
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Yin, Bangda, Deng, Jianhui, Peng, Xue, Long, Qian, Zhao, Jiangna, Lu, Qiujun, Chen, Qiong, Li, Haitao, Tang, Hao, Zhang, Youyu, and Yao, Shouzhuo
- Subjects
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CHEMICAL synthesis , *CARBON nanodots , *FLUORESCENCE , *CARBONIZATION , *HYPOCHLORITES - Abstract
High quality carbon dots (C-dots) with down- and up-conversion fluorescence have been synthesized through low-temperature carbonization using sweet pepper as the carbon source. The C-dots with a quantum yield (QY) of 19.3% exhibit superior photophysical properties, for example, narrow and symmetric emission spectra, large stock shifts, resistance to photobleaching, and excitation-dependent fluorescence behavior. The excellent C-dots serve as useful fluorescent probes for hypochlorite (ClO−) detection by both down- and up-conversion fluorescence. Two consecutive linear ranges allow a wide determination of ClO− concentrations with a low detection limit of 0.05 μmol L−1 and 0.06 μmol L−1 (S/N = 3) for down- and up-conversion fluorescence measurements, respectively. The proposed detection method is advantageous because it is simple, sensitive, dual-signalling model and low-cost and has potential extensive applications in environmental and biological assays. [ABSTRACT FROM AUTHOR]
- Published
- 2013
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