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- W824427129 abstract "Nitrogen and sulfur co-doped carbon dots (N,S/C-dots) with high fluorescence quantum yields (FLQY, 25%) was successfully synthesized by a one-step microwave-assisted method. In comparison with nitrogen doped C-dots (N/C-dots) prepared using the same method, the resulting N,S/C-dots featured small particle size, uniform surface state, insensitive FL properties to excitation wavelengths and environmental conditions, negligible cytotoxicity and excellent biocompatibility. Simultaneous doping of N and S effectively promoted electron-transfer and coordination interaction between N,S/C-dots and Hg2+. Thus, when used as fluorescence probe for Hg2+ label-free detection, the resulting N,S/C-dots showed good detection sensitivity and ion selectivity. The limit of detection was 2 μM; among 15 metal ions investigated, only Fe3+ showed interference to the Hg2+ detection. Fortunately, this interference could be effectively shielded using a chelating agent sodium hexametaphoshpate. The applicability of N,S/C-dots as fluorescence probe for Hg2+ detection in lake water and tap water was demonstrated. Finally, based on its favorable features of negligible cytotoxicity and excellent biocompatibility, the N,S/C-dots were successfully applied to probe Hg2+ in living cells, which broaden its application in biological system." @default.
- W824427129 created "2016-06-24" @default.
- W824427129 creator A5023858361 @default.
- W824427129 creator A5051473707 @default.
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- W824427129 date "2015-12-01" @default.
- W824427129 modified "2023-10-18" @default.
- W824427129 title "Nitrogen and sulfur co-doped carbon dots for highly selective and sensitive detection of Hg (Ⅱ) ions" @default.
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- W824427129 doi "https://doi.org/10.1016/j.bios.2015.06.050" @default.
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