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N,S co-doped carbon dots as a stable bio-imaging probe for detection of intracellular temperature and tetracycline

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Abstract

Stable bioimaging with nanomaterials in living cells has been a great challenge and of great importance for understanding intracellular events and elucidating various biological phenomena. Herein, we demonstrate that N,S co-doped carbon dots (N,S-CDs) produced by one-pot reflux treatment of C3N3S3 with ethane diamine at a relatively low temperature (80 °C) exhibit a high fluorescence quantum yield of about 30.4%, favorable biocompatibility, low-toxicity, strong resistance to photobleaching and good stability. The N,S-CDs as an effective temperature indicator exhibit good temperature-dependent fluorescence with a sensational linear response from 20 to 80 °C. In addition, the obtained N,S-CDs facilitate high selectivity detection of tetracycline (TC) with a detection limit as low as 3 × 10−10 M and a wide linear range from 1.39 × 10−5 to 1.39 × 10−9 M. More importantly, the N,S-CDs display an unambiguous bioimaging ability in the detection of intracellular temperature and TC with satisfactory results.

Graphical abstract: N,S co-doped carbon dots as a stable bio-imaging probe for detection of intracellular temperature and tetracycline

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Publication details

The article was received on 24 Mar 2017, accepted on 10 Apr 2017 and first published on 11 Apr 2017


Article type: Paper
DOI: 10.1039/C7TB00810D
Citation: J. Mater. Chem. B, 2017, Advance Article
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    N,S co-doped carbon dots as a stable bio-imaging probe for detection of intracellular temperature and tetracycline

    W. Shi, F. Guo, M. Han, S. Yuan, W. Guan, H. Li, H. Huang, Y. Liu and Z. Kang, J. Mater. Chem. B, 2017, Advance Article , DOI: 10.1039/C7TB00810D

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