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- W2989819752 abstract "Abstract A one-step hydrothermal process to synthesize N-doping graphene quantum dots (N-GQDs) using PVP K90 as the novel self-passivation agent, in which the self-passivation and N-doping is realized simultaneously, is first proposed. The as-obtained N-GQDs with an average diameter of 1.9 ± 0.6 nm can emit blue fluorescence (365 nm excitation), and possess a high fluorescent quantum yield (QY) of 64.2%. Due to the inner filter effect, N-GQDs are considered as outstanding fluorescent probes for detecting Cr(VI), which exhibit a lower detection limit (91 nM) and a wider linear range (0.1–100 μM). Significantly, the fluorescent probe also indicates a remarkably high selectivity towards Cr(VI) among other metal ions with high concentrations. The fluorescence intensity of N-GQDs quenched by Cr(VI) is significantly turned on through adding reducing agent. What’s more, N-GQDs have been successfully used to detect Cr(VI) in running water. In addition, the as-obtained N-GQDs could be further applied in cell imaging due to its biocompatibility and low cytotoxicity. Therefore, N-GQDs could be a wondrous sensing system for detecting Cr(VI) and fluorescent marker of MCF-7 cells with a wide range of potential applications." @default.
- W2989819752 created "2019-12-05" @default.
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- W2989819752 date "2020-04-01" @default.
- W2989819752 modified "2023-10-17" @default.
- W2989819752 title "A highly selective and sensitive fluorescent probe for detecting Cr(VI) and cell imaging based on nitrogen-doped graphene quantum dots" @default.
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- W2989819752 doi "https://doi.org/10.1016/j.jallcom.2019.153191" @default.
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