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Enhanced Near-Infrared Emission from Carbon Dots by Surface Deprotonation
Liu,Enshan1; Liang,Tao1; Ushakova,Elena V.2,3; Wang,Bingzhe1; Zhang,Bohan1; Zhou,Huiqun5; Xing,Guichuan1; Wang,Chunming5; Tang,Zikang1; Qu,Songnan1; Rogach,Andrey L.2,4
2021-01-14
Source PublicationJournal of Physical Chemistry Letters
Volume12Issue:1Pages:604-611
AbstractCarbon 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
Language英语
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Document TypeJournal article
CollectionINSTITUTE OF APPLIED PHYSICS AND MATERIALS ENGINEERING
Corresponding AuthorTang,Zikang
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
Liu,Enshan,Liang,Tao,Ushakova,Elena V.,et al. Enhanced Near-Infrared Emission from Carbon Dots by Surface Deprotonation[J]. Journal of Physical Chemistry Letters,2021,12(1):604-611.
APA Liu,Enshan,Liang,Tao,Ushakova,Elena V.,Wang,Bingzhe,Zhang,Bohan,Zhou,Huiqun,Xing,Guichuan,Wang,Chunming,Tang,Zikang,Qu,Songnan,&Rogach,Andrey L..(2021).Enhanced Near-Infrared Emission from Carbon Dots by Surface Deprotonation.Journal of Physical Chemistry Letters,12(1),604-611.
MLA Liu,Enshan,et al."Enhanced Near-Infrared Emission from Carbon Dots by Surface Deprotonation".Journal of Physical Chemistry Letters 12.1(2021):604-611.
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