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One-step synthesis of nitrogen, sulfur co-doped carbon nanodots and application for Fe3+ detection

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Abstract

Carbon nanodots (CDs) are novel forms of zero-dimensional carbonaceous nanomaterials, which have attracted the attention of researchers. Long wavelength emission decreases the interference of auto-fluorescence of tissue and can also penetrate more deeply. However, it is still a challenge to develop red emissive CDs. In this work, nitrogen, sulfur co-doped CDs are synthesized with red light emission through one-step solvothermal treatment. The as-synthesized CDs exhibit excellent properties such as high chemical stability, good biocompatibility, excellent photoluminescence properties, good water solubility, and low toxicity, and also show high sensitivity and selectivity towards Fe3+ sensing. The detection limit is as low as 17.3 nM. In addition, the CDs are successfully utilized for monitoring Fe3+ in living cells, which demonstrates their promising applicability in bioimaging. Furthermore, a test paper based on the CQDs has been prepared. This developed nanosensor can detect Fe3+ visually and sensitively without any further steps which will make a great contribution to the development of ion sensors.

Graphical abstract: One-step synthesis of nitrogen, sulfur co-doped carbon nanodots and application for Fe3+ detection

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Publication details

The article was received on 22 Jan 2018, accepted on 23 Apr 2018 and first published on 24 Apr 2018


Article type: Paper
DOI: 10.1039/C8TB00193F
Citation: J. Mater. Chem. B, 2018, Advance Article
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    One-step synthesis of nitrogen, sulfur co-doped carbon nanodots and application for Fe3+ detection

    X. Qie, M. Zan, P. Miao, L. Li, Z. Chang, M. Ge, P. Gui, Y. Tang and W. Dong, J. Mater. Chem. B, 2018, Advance Article , DOI: 10.1039/C8TB00193F

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