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Doping effect and fluorescence quenching mechanism of N-doped graphene quantum dots in the detection of dopamine
Ma, Y.; Chen, A. Y.; Xie, X. F.; Wang, X. Y.; Wang, D.; Wang, P.; Li, H. J.; Yang, J. H.; Li, Y.
2019-05-01
Source PublicationTALANTA
ISSN0039-9140
Volume196Pages:563
SubtypeArticle
AbstractElement doping is recognized as a powerful way to modify surface defect structure and further enhance the fluorescence performance of graphene quantum dots (GQDs). N-doped, S-doped and S, N co-doped GQDs were synthesized to explore the influence of element doping on fluorescence sensing of dopamine (DA) biomolecules. Two interesting works are found, one is that the N-doped GQDs with urea as N source are more effective than the S-doped and S,N co-doped GQDs, characterized by the higher quantum yield (QY) up to 78% and sensitive fluorescence quenching performance to DA. The other is that the N-doped GQDs with ethylenediamine as N source have the highest QY up to 95%, however, exhibits no quenching performance to DA. This abnormal observation is discussed based on the microstructure analysis. Under the optimal reaction condition, the N-doped GQDs exhibit a dual linear relationship of quenching intensity with DA concentration in the range of 10-3000 nM and 3000-7000 nM with detection limits of 3.3 and 611 nM, respectively. The quenching mechanism of N-doped GQDs toward DA is explored from the view of N chemical states, biomolecule structure of DA homologues and redox reaction of DA.
KeywordGraphene quantum dot Doping effect Fluorescent sensing Dopamine Sensitivity
DOI10.1016/j.talanta.2019.01.001
Language英语
WOS Research AreaChemistry
PublisherELSEVIER SCIENCE BV
Citation statistics
Cited Times:24[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/27162
Collection中国科学院上海硅酸盐研究所
Recommended Citation
GB/T 7714
Ma, Y.,Chen, A. Y.,Xie, X. F.,et al. Doping effect and fluorescence quenching mechanism of N-doped graphene quantum dots in the detection of dopamine[J]. TALANTA,2019,196:563.
APA Ma, Y..,Chen, A. Y..,Xie, X. F..,Wang, X. Y..,Wang, D..,...&Li, Y..(2019).Doping effect and fluorescence quenching mechanism of N-doped graphene quantum dots in the detection of dopamine.TALANTA,196,563.
MLA Ma, Y.,et al."Doping effect and fluorescence quenching mechanism of N-doped graphene quantum dots in the detection of dopamine".TALANTA 196(2019):563.
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