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Enhanced Near-Infrared Emission from Carbon Dots by Surface Deprotonation
Enshan Liu1; Tao Liang1; Elena V. Ushakova2,3; Bingzhe Wang1; Bohan Zhang1; Huiqun Zhou5; Guichuan Xing1; Chunming Wang5; Zikang Tang1; Songnan Qu1; Andrey L. Rogach2,4
2020-12-31
Source PublicationJournal of Physical Chemistry Letters
ISSN1948-7185
Volume12Issue:1Pages:604-611
Abstract

Carbon dots (CDs) with efficient excitation and emission in deep-red/near-infrared (NIR) spectral range are important for bioimaging applications. Herein, we develop a simple and effective method to significantly enhance both the absorption and emission of CDs in deep-red/NIR by suppressing nonradiative charge recombination via deprotonation of the CD surface. As compared to aqueous solutions at room temperature, NIR emission of CDs in N,N-dimethylformamide and glycerol experience a 50- and 70-fold increase at -20 °C, respectively, due to enhanced deprotonation ability and viscosity. On the basis of the adjustable NIR fluorescence intensity of CDs, multilevel data encryption in the NIR region is realized by controlling the humidity and the temperature of a CD-ink stamped paper.

DOI10.1021/acs.jpclett.0c03383
URLView the original
Indexed BySCIE
Language英語English
WOS Research AreaChemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
WOS SubjectChemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Atomic, Molecular & Chemical
WOS IDWOS:000667303000004
PublisherAMER CHEMICAL SOC, 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
Scopus ID2-s2.0-85100070105
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Cited Times [WOS]:7   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionINSTITUTE OF APPLIED PHYSICS AND MATERIALS ENGINEERING
Institute of Chinese Medical Sciences
Corresponding AuthorZikang Tang; Songnan Qu
Affiliation1.Joint Key Laboratory of the Ministry of Education,Institute of Applied Physics and Materials Engineering,University of Macau,Taipa,999078,Macao
2.Department of Materials Science and Engineering,Centre for Functional Photonics (CFP),City University of Hong Kong,Kowloon,999077,Hong Kong
3.Center of Information Optical Technologies,ITMO University,Saint Petersburg,197101,Russian Federation
4.Shenzhen Research Institute,City University of Hong Kong,Shenzhen,518057,China
5.State Key Laboratory of Quality Research in Chinese Medicine,Institute of Chinese Medical Sciences,University of Macau,Macau SAR,Taipa,999078,Macao
First Author AffilicationINSTITUTE OF APPLIED PHYSICS AND MATERIALS ENGINEERING
Corresponding Author AffilicationINSTITUTE OF APPLIED PHYSICS AND MATERIALS ENGINEERING
Recommended Citation
GB/T 7714
Enshan Liu,Tao Liang,Elena V. Ushakova,et al. Enhanced Near-Infrared Emission from Carbon Dots by Surface Deprotonation[J]. Journal of Physical Chemistry Letters,2020,12(1):604-611.
APA Enshan Liu,Tao Liang,Elena V. Ushakova,Bingzhe Wang,Bohan Zhang,Huiqun Zhou,Guichuan Xing,Chunming Wang,Zikang Tang,Songnan Qu,&Andrey L. Rogach.(2020).Enhanced Near-Infrared Emission from Carbon Dots by Surface Deprotonation.Journal of Physical Chemistry Letters,12(1),604-611.
MLA Enshan Liu,et al."Enhanced Near-Infrared Emission from Carbon Dots by Surface Deprotonation".Journal of Physical Chemistry Letters 12.1(2020):604-611.
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