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On-Off switching of the phosphorescence signal in a carbon dot/polyvinyl alcohol composite for multiple data encryption
Xin Bao1,2; Elena V. Ushakova3,4; Enshan Liu5; Zhengjie Zhou1,2; Di Li1; Ding Zhou1; Songnan Qu5; Andrey L. Rogach3,4
2019-07-08
Source PublicationNanoscale
ISSN2040-3364
Volume11Issue:30Pages:14250-14255
Other Abstract

Phosphorescence processes in composite systems based on luminescent carbon dots (CDs) are of great fundamental and practical interest. Herein, the control of the phosphorescent signal in a CD/polyvinyl alcohol (PVA) composite is realized. Enhanced green phosphorescence is obtained via thermal annealing of the composite under 200 °C, which can be quenched via water treatment, and then recovered again, via either repeated annealing or near-infrared laser irradiation. Water molecules infiltrating the CD/PVA composite lead to considerable vibrational motions of the CD surface groups through destruction of the rigid composite structure together with an increase in the possibility of the penetration of the phosphorescence quenchers, and thus a decrease in the phosphorescence intensity. After repeated annealing, the nonradiative transitions are restricted, and the phosphorescence signal is recovered again. Based on such on-off switching of the phosphorescence signal, a concept of multiple data encryption is realized by using the CD@PVA composite.

DOI10.1039/c9nr05123f
URLView the original
Indexed BySCIE
Language英語English
WOS Research AreaChemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
WOS SubjectChemistry, Multidisciplinary ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied
WOS IDWOS:000484234700020
Scopus ID2-s2.0-85070850205
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Cited Times [WOS]:15   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionUniversity of Macau
Corresponding AuthorSongnan Qu
Affiliation1.State Key Laboratory of Luminescence and Applications,Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun,130033,China
2.University of Chinese Academy of Sciences,Beijing,100049,China
3.Center of Information Optical Technologies,ITMO University,Saint Petersburg,197101,Russian Federation
4.Department of Materials Science and Engineering,Centre for Functional Photonics,City University of Hong Kong,Kowloon,83 Tat Chee Avenue,Hong Kong
5.Joint Key Laboratory of the Ministry of Education,Institute of Applied Physics and Materials Engineering,University of Macau,Taipa Macau,Macao
Corresponding Author AffilicationINSTITUTE OF APPLIED PHYSICS AND MATERIALS ENGINEERING
Recommended Citation
GB/T 7714
Xin Bao,Elena V. Ushakova,Enshan Liu,et al. On-Off switching of the phosphorescence signal in a carbon dot/polyvinyl alcohol composite for multiple data encryption[J]. Nanoscale,2019,11(30):14250-14255.
APA Xin Bao,Elena V. Ushakova,Enshan Liu,Zhengjie Zhou,Di Li,Ding Zhou,Songnan Qu,&Andrey L. Rogach.(2019).On-Off switching of the phosphorescence signal in a carbon dot/polyvinyl alcohol composite for multiple data encryption.Nanoscale,11(30),14250-14255.
MLA Xin Bao,et al."On-Off switching of the phosphorescence signal in a carbon dot/polyvinyl alcohol composite for multiple data encryption".Nanoscale 11.30(2019):14250-14255.
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