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Orange-emitting N-doped carbon dots as fluorescent and colorimetric dual-mode probes for nitrite detection and cellular imaging

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Abstract

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 μM with the detection limit of 0.35 μM. 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 μM with a detection limit down to 0.13 μM. Additionally, the N-CDs were capable of monitoring NO2 in the A549 cells, which indicated their great potential in biosensing.

Graphical abstract: Orange-emitting N-doped carbon dots as fluorescent and colorimetric dual-mode probes for nitrite detection and cellular imaging

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Supplementary files

Article information


Submitted
25 Dec 2019
Accepted
03 Feb 2020
First published
04 Feb 2020

J. Mater. Chem. B, 2020, Advance Article
Article type
Paper

Orange-emitting N-doped carbon dots as fluorescent and colorimetric dual-mode probes for nitrite detection and cellular imaging

J. Jia, W. Lu, L. Li, Y. Gao, Y. Jiao, H. Han, C. Dong and S. Shuang, J. Mater. Chem. B, 2020, Advance Article , DOI: 10.1039/C9TB02934F

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