期刊
JOURNAL OF MATERIALS CHEMISTRY B
卷 8, 期 10, 页码 2123-2127出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9tb02934f
关键词
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资金
- National Natural Science Foundation of China [21874087, 21575084]
- Natural Science Foundation of Shanxi Province [201701D221029]
- Shanxi Scholarship Council of China (2017 Key1)
Novel orange-emitting N-doped carbon dots (N-CDs) were prepared as fluorescent and colorimetric dual-mode probes for sensing nitrite (NO2-). The obtained N-CDs possessed fantastic optical properties and specific responses to NO2-. NO2- could induce the fluorescence static quenching of N-CDs, and a linear relationship was obtained in the range from 2 to 60 mu M with the detection limit of 0.35 mu M. More interestingly, the N-CDs exhibited ratiometric absorption signals with visible color conversion (red-purple), which allowed the development of a simple colorimetric method for NO2- monitoring in the linear range of 2-80 mu M with a detection limit down to 0.13 mu M. Additionally, the N-CDs were capable of monitoring NO2- in the A549 cells, which indicated their great potential in biosensing.
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