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Bacteria-derived fluorescent carbon dots for highly selective detection of p-nitrophenol and bioimaging

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Abstract

p-Nitrophenol (p-NP) pollutants are widely present in soil and aquatic environments and can seriously impair the health of living beings. Hence, a rapid, sensitive, and selective method for p-NP detection is urgently needed. Herein, for the first time, we successfully synthesized fluorescent carbon dots (CDs) from Bacillus cereus (BC) via a one-step hydrothermal process. The obtained CDs-BC can be applied as a rapid, highly selective, and sensitive sensor for p-NP detection. The fluorescence quenching efficiency of the CD-BC sensor exhibited excellent linear responses with p-NP concentrations at both 0.3–6.5 μM and 6.5–30 μM, with a detection limit of 0.11 μM. The mechanism of p-NP detection is based on the inner filter effect (IFE). Preliminary bacteria, cell, and animal studies showed that the as-prepared CDs-BC possess high photostability, excellent biocompatibility, low or no biotoxicity, and multicolor fluorescence emission properties; furthermore, they can be rapidly excreted from the body of mice, which suggests their potential for applications in the biomedical field.

Graphical abstract: Bacteria-derived fluorescent carbon dots for highly selective detection of p-nitrophenol and bioimaging

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Publication details

The article was received on 17 Jun 2019, accepted on 28 Jul 2019 and first published on 30 Jul 2019


Article type: Paper
DOI: 10.1039/C9AN01103J
Analyst, 2019, Advance Article

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    Bacteria-derived fluorescent carbon dots for highly selective detection of p-nitrophenol and bioimaging

    S. Zhang, D. Zhang, Y. Ding, J. Hua, B. Tang, X. Ji, Q. Zhang, Y. Wei, K. Qin and B. Li, Analyst, 2019, Advance Article , DOI: 10.1039/C9AN01103J

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