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Near-Infrared Excitation Emission and Multiphoton-Induced Fluorescence of Carbon Dots
文献类型：期刊论文
| 作者 | Li, D. ; Jing, P. T.; Sun, L. H.; An, Y.; Shan, X. Y.; Lu, X. H.; Zhou, D.; Han, D.; Shen, D. Z.; Zhai, Y. C.
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| 刊名 | Advanced Materials
 |
| 出版日期 | 2018 |
| 卷号 | 30期号:13页码:8 |
| 关键词 | carbon dots multiphoton-induced fluorescence near-infrared absorption near-infrared fluorescence surface engineering graphene quantum dots red emission nanodots green blue luminescence therapy Chemistry Science & Technology - Other Topics Materials Science Physics |
| ISSN号 | 0935-9648 |
| DOI | 10.1002/adma.201705913 |
| 英文摘要 | Carbon dots (CDs) have significant potential for use in various fields including biomedicine, bioimaging, and optoelectronics. However, inefficient excitation and emission of CDs in both near-infrared (NIR-I and NIR-II) windows remains an issue. Solving this problem would yield significant improvement in the tissue-penetration depth for in vivo bioimaging with CDs. Here, an NIR absorption band and enhanced NIR fluorescence are both realized through the surface engineering of CDs, exploiting electron-acceptor groups, namely molecules or polymers rich in sulfoxide/carbonyl groups. These groups, which are bound to the outer layers and the edges of the CDs, influence the optical bandgap and promote electron transitions under NIR excitation. NIR-imaging information encryption and in vivo NIR fluorescence imaging of the stomach of a living mouse using CDs modified with poly(vinylpyrrolidone) in aqueous solution are demonstrated. In addition, excitation by a 1400 nm femtosecond laser yields simultaneous two-photon-induced NIR emission and three-photon-induced red emission of CDs in dimethyl sulfoxide. This study represents the realization of both NIR-I excitation and emission as well as two-photon-and three-photon-induced fluorescence of CDs excited in an NIR-II window, and provides a rational design approach for construction and clinical applications of CD-based NIR imaging agents. |
| 源URL | [http://ir.ciomp.ac.cn/handle/181722/61076]  |
| 专题 | 中国科学院长春光学精密机械与物理研究所 |
| 推荐引用方式 GB/T 7714 | Li, D.,Jing, P. T.,Sun, L. H.,et al. Near-Infrared Excitation Emission and Multiphoton-Induced Fluorescence of Carbon Dots[J]. Advanced Materials,2018,30(13):8. |
| APA | Li, D..,Jing, P. T..,Sun, L. H..,An, Y..,Shan, X. Y..,...&Rogach, A. L..(2018).Near-Infrared Excitation Emission and Multiphoton-Induced Fluorescence of Carbon Dots.Advanced Materials,30(13),8. |
| MLA | Li, D.,et al."Near-Infrared Excitation Emission and Multiphoton-Induced Fluorescence of Carbon Dots".Advanced Materials 30.13(2018):8. |
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