Preparation of nitrogen-doped carbon dots with a high fluorescence quantum yield for the highly sensitive detection of Cu<sup>2+</sup> ions, drawing anti-counterfeit patterns and imaging live cells

LIU Wen; ZHANG Rong; KANG Yu; ZHANG Xiao-ying; WANG Hao-jiang; LI Li-hong; DIAO Hai-peng; WEI Wen-long

doi:10.1016/S1872-5805(19)60021-1

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Article Navigation > New Carbon Mater. > 2019 > 34(4): 390-402

LIU Wen, ZHANG Rong, KANG Yu, ZHANG Xiao-ying, WANG Hao-jiang, LI Li-hong, DIAO Hai-peng, WEI Wen-long. Preparation of nitrogen-doped carbon dots with a high fluorescence quantum yield for the highly sensitive detection of Cu2+ ions, drawing anti-counterfeit patterns and imaging live cells. New Carbon Mater., 2019, 34(4): 390-402. doi: 10.1016/S1872-5805(19)60021-1

Citation:

LIU Wen, ZHANG Rong, KANG Yu, ZHANG Xiao-ying, WANG Hao-jiang, LI Li-hong, DIAO Hai-peng, WEI Wen-long. Preparation of nitrogen-doped carbon dots with a high fluorescence quantum yield for the highly sensitive detection of Cu²⁺ ions, drawing anti-counterfeit patterns and imaging live cells. New Carbon Mater., 2019, 34(4): 390-402. doi: 10.1016/S1872-5805(19)60021-1

Citation:

LIU Wen, ZHANG Rong, KANG Yu, ZHANG Xiao-ying, WANG Hao-jiang, LI Li-hong, DIAO Hai-peng, WEI Wen-long. Preparation of nitrogen-doped carbon dots with a high fluorescence quantum yield for the highly sensitive detection of Cu²⁺ ions, drawing anti-counterfeit patterns and imaging live cells. New Carbon Mater., 2019, 34(4): 390-402. doi: 10.1016/S1872-5805(19)60021-1

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Preparation of nitrogen-doped carbon dots with a high fluorescence quantum yield for the highly sensitive detection of Cu²⁺ ions, drawing anti-counterfeit patterns and imaging live cells

doi: 10.1016/S1872-5805(19)60021-1

1.
School of Basic Medical Sciences, Shanxi Medical University, Taiyuan 030001, China;
2.
School of Shanxi provincial Traditional Chinese medicine, Taiyuan 030012, China;
3.
Department of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, China

Funds: National Natural Science Foundation of China (21705104); Key Research and Development Projects of Shanxi Province (201703D321015-2); Youth Science Foundation of Shanxi Province (201701D221064); Science & Technology Innovation Fund of Shanxi Medical University (C01201003); Ph. D Startup Fund of Shanxi Medical University (BS201723).

Received Date: 2019-06-01
Accepted Date: 2019-09-10
Rev Recd Date: 2019-08-01
Publish Date: 2019-08-28

Abstract

Abstract

Water-soluble luminescent nitrogen-doped CDs (N-CDs) having a high QY of 29.83% were prepared by a one-step microwave-assisted pyrolysis method using ammonium citrate and triethylenetetramine as the precursors. The microstructure, optical properties and biocompatibility of the N-CDs were investigated. Results indicate that they exhibit a strong fluorescence, favorable biocompatibility and excellent optical stability. Their photoluminescence is quenched by Cu²⁺ ions through the formation of a complex between the N-CDs and Cu²⁺, which can be used for Cu²⁺ detection. Compared with other CD-based nanomaterials, the N-CDs show outstanding optical properties, and excellent selectivity and sensitivity for Cu²⁺ detection with a linear range of 0.01-11 μM and a detection limit of 4.5 nM. The selectivity for Cu²⁺ detection is so good that the N-CDs have been successfully used in Cu²⁺ detection for real water samples. They have also been used to draw fluorescent patterns and image living cells.
- Carbon dots,
- Highly fluorescence quantum yield,
- Cu²⁺ sensor,
- Fluorescent patterns,
- Cells imaging

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