Near-Infrared Excitation Emission and Multiphoton-Induced Fluorescence of Carbon Dots

doi:10.1002/adma.201705913

CIOMP OpenIR

	Near-Infrared Excitation Emission and Multiphoton-Induced Fluorescence of Carbon Dots
	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.; Qu, S. N.; Zboril, R.; Rogach, A. L.
	2018
Source Publication	Advanced Materials
ISSN	0935-9648
Volume	30 Issue:13 Pages: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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中国科学院长春光学精密机械与物理研究所