Influence of Group Modification at the Edges of Carbon Quantum Dots on Fluorescent Emission
文献类型：期刊论文
| 作者 | Tang, Ju1; Zhang, Jin1 ; Zhang, Yunfei1; Xiao, Yiming1; Shi, Yanli1; Chen, Yunhua1; Ding, Lan1; Xu, Wen1
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| 刊名 | NANOSCALE RESEARCH LETTERS
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| 出版日期 | 2019 |
| 卷号 | 14 |
| ISSN号 | 1931-7573 |
| 其他题名 | Influence of Group Modification at the Edges of Carbon Quantum Dots on Fluorescent Emission |
| 英文摘要 | We present a detailed investigation on the effect of functional group modulation at the edges of carbon quantum dots (CQDs) on the fluorescence from the CQDs. The CQDs attached by N, S, and P elements are synthesized via pyrolysis of a mixture of citric acid and NH3H2O, H2SO4, and H3PO4, respectively. Thus, part of -COOH at the edges of CQDs can be converted into -C=O and functional groups such as -NH2, -SO2, -HSO3, and -H2PO4 can connect to the carbon bonds. We find that the formation of the N/S/P-CQDs can reduce the amount of -COOH that attaches to the edges of sp(2)-conjugated pi-domains located at centers of these CQDs. This effect can result in the reduction of the non-radiative recombination for electronic transition in these CQDs. As a result, the quantum yield (QY) for fluorescence from the CQDs can be efficiently enhanced. We demonstrate experimentally that the QYs for N/S/P-CQDs can reach up to 18.7%, 29.7%, and 10.3%, respectively, in comparison to 9% for these without functional group modulation. This work can provide a practical experimental approach in improving the optical properties of fluorescent CQDs. |
| 资助项目 | [National Natural Science Foundation of China] ; [Department of Science and Technology of Yunnan Province] ; [Yunnan University] ; [Center of Science and Technology of Hefei Academy of Science] |
| 语种 | 英语 |
| 源URL | [http://ir.hfcas.ac.cn:8080/handle/334002/124208]  |
| 专题 | 中国科学院合肥物质科学研究院 |
| 作者单位 | 1.Yunnan University 2.Hefei Institutes of Physical Science, Chinese Academy of Sciences |
| 推荐引用方式 GB/T 7714 | Tang, Ju,Zhang, Jin,Zhang, Yunfei,et al. Influence of Group Modification at the Edges of Carbon Quantum Dots on Fluorescent Emission[J]. NANOSCALE RESEARCH LETTERS,2019,14. |
| APA | Tang, Ju.,Zhang, Jin.,Zhang, Yunfei.,Xiao, Yiming.,Shi, Yanli.,...&Xu, Wen.(2019).Influence of Group Modification at the Edges of Carbon Quantum Dots on Fluorescent Emission.NANOSCALE RESEARCH LETTERS,14. |
| MLA | Tang, Ju,et al."Influence of Group Modification at the Edges of Carbon Quantum Dots on Fluorescent Emission".NANOSCALE RESEARCH LETTERS 14(2019). |
入库方式： OAI收割
来源：合肥物质科学研究院
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