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Thermally Activated Upconversion Near-Infrared Photoluminescence from Carbon Dots Synthesized via Microwave Assisted Exfoliation
Li,Di1; Liang,Chao2; Ushakova,Elena V.3; Sun,Minghong1; Huang,Xiaodan4; Zhang,Xiaoyu5; Jing,Pengtao1; Yoo,Seung Jo6; Kim,Jin Gyu6; Liu,Enshan2; Zhang,Wei5; Jing,Lihong4; Xing,Guichuan2; Zheng,Weitao5; Tang,Zikang2; Qu,Songnan2; Rogach,Andrey L.3,7
2019-12-01
Source PublicationSmall
ISSN1613-6810
Volume15Issue:50
AbstractUpconversion near-infrared (NIR) fluorescent carbon dots (CDs) are important for imaging applications. Herein, thermally activated upconversion photoluminescence (UCPL) in the NIR region, with an emission peak at 784 nm, which appears under 808 nm continuous-wave laser excitation, are realized in the NIR absorbing/emissive CDs (NIR-CDs). The NIR-CDs are synthesized by microwave-assisted exfoliation of red emissive CDs in dimethylformamide, and feature single or few-layered graphene-like cores. This structure provides an enhanced contact area of the graphene-like plates in the core with the electron-acceptor carbonyl groups in dimethylformamide, which contributes to the main NIR absorption band peaked at 724 nm and a tail band in 800–850 nm. Temperature-dependent photoluminescence spectra and transient absorption spectra confirm that the UCPL of NIR-CDs is due to the thermally activated electron transitions in the excited state, rather than the multiphoton absorption process. Temperature dependent upconversion NIR luminescence imaging is demonstrated for NIR-CDs embedded in a polyvinyl pyrrolidone film, and the NIR upconversion luminescence imaging in vivo using NIR-CDs in a mouse model is accomplished.
Keywordcarbon dots exfoliation near-infrared absorption near-infrared photoluminescence upconversion photoluminescence
DOI10.1002/smll.201905050
URLView the original
Language英语
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Cited Times [WOS]:19   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionINSTITUTE OF APPLIED PHYSICS AND MATERIALS ENGINEERING
Corresponding AuthorQu,Songnan
Affiliation1.State Key Laboratory of Luminescence and Applications,Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun,3888 Eastern South Lake Road,130033,China
2.Joint Key Laboratory of the Ministry of Education,Institute of Applied Physics and Materials Engineering,University of Macau,Avenida da Universidade,Taipa,999078,China
3.Center of Information Optical Technologies,ITMO University,Saint Petersburg,197101,Russian Federation
4.Key Laboratory of Colloid,Interface and Chemical Thermodynamics,Institute of Chemistry,Chinese Academy of Sciences,Beijing,Bei Yi Jie 2, Zhong Guan Cun,100190,China
5.School of Materials Science and Engineering,Electron Microscopy Center,Jilin University,Changchun,130012,China
6.Department of Electron Microscopy Research,Korea Basic Science Institute,Daejeon,34133,South Korea
7.Department of Materials Science and Engineering,and Centre for Functional Photonics (CFP),City University of Hong Kong,Kowloon,Hong Kong
Corresponding Author AffilicationINSTITUTE OF APPLIED PHYSICS AND MATERIALS ENGINEERING
Recommended Citation
GB/T 7714
Li,Di,Liang,Chao,Ushakova,Elena V.,et al. Thermally Activated Upconversion Near-Infrared Photoluminescence from Carbon Dots Synthesized via Microwave Assisted Exfoliation[J]. Small,2019,15(50).
APA Li,Di,Liang,Chao,Ushakova,Elena V.,Sun,Minghong,Huang,Xiaodan,Zhang,Xiaoyu,Jing,Pengtao,Yoo,Seung Jo,Kim,Jin Gyu,Liu,Enshan,Zhang,Wei,Jing,Lihong,Xing,Guichuan,Zheng,Weitao,Tang,Zikang,Qu,Songnan,&Rogach,Andrey L..(2019).Thermally Activated Upconversion Near-Infrared Photoluminescence from Carbon Dots Synthesized via Microwave Assisted Exfoliation.Small,15(50).
MLA Li,Di,et al."Thermally Activated Upconversion Near-Infrared Photoluminescence from Carbon Dots Synthesized via Microwave Assisted Exfoliation".Small 15.50(2019).
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