KMS Shanghai Institute of Ceramics，Chinese Academy of Sciences
| 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 Publication | TALANTA
 |
| ISSN | 0039-9140 |
| Volume | 196Pages:563 |
| Subtype | Article |
| Abstract | Element 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. |
| Keyword | Graphene quantum dot Doping effect Fluorescent sensing Dopamine Sensitivity |
| DOI | 10.1016/j.talanta.2019.01.001 |
| Language | 英语 |
| WOS Research Area | Chemistry |
| Publisher | ELSEVIER SCIENCE BV |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://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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