期刊
JOURNAL OF MATERIALS CHEMISTRY B
卷 6, 期 21, 页码 3549-3554出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8tb00193f
关键词
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资金
- Key Research Program of the Chinese Academy of Sciences [KFZD-SW-21]
- National Key R&D Program of China [2017YFF0108600, 2016YFF0103800, 2017YFC0211900]
- Science and Technology Department of Suzhou City [ZXY201434, SS201539]
- National Key Instrument Developing Project of China [ZDYZ2013-1]
- National Natural Science Foundation of China [81771982, 81771929, 61535010, 8160071152]
- Natural Science Foundation of Jiangsu Province [BE2015601]
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.
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