Changchun Institute of Optics,Fine Mechanics and Physics,CAS
Near-Infrared Excitation Emission and Multiphoton-Induced Fluorescence of Carbon Dots | |
Li, D.![]() ![]() | |
2018 | |
Source Publication | Advanced Materials
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ISSN | 0935-9648 |
Volume | 30Issue:13Pages:8 |
Abstract | 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. |
Keyword | 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 |
DOI | 10.1002/adma.201705913 |
Indexed By | SCI ; EI |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://ir.ciomp.ac.cn/handle/181722/61076 |
Collection | 中国科学院长春光学精密机械与物理研究所 |
Recommended Citation 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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