On-Off switching of the phosphorescence signal in a carbon dot/polyvinyl alcohol composite for multiple data encryption

doi:10.1039/c9nr05123f

	On-Off switching of the phosphorescence signal in a carbon dot/polyvinyl alcohol composite for multiple data encryption
	X.Bao; E.V.Ushakova; E.S.Liu; Z.J.Zhou; D.Li; D.Zhou
	2019
发表期刊	Nanoscale
ISSN	2040-3364
卷号	11 期号:30 页码:14250-14255
摘要	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 degrees 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.
关键词	quantum dots,Chemistry,Science & Technology - Other Topics,Materials Science,Physics
DOI	10.1039/c9nr05123f
URL	查看原文
收录类别	SCI ; EI
语种	英语
引用统计
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/63476
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	X.Bao,E.V.Ushakova,E.S.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	X.Bao,E.V.Ushakova,E.S.Liu,Z.J.Zhou,D.Li,&D.Zhou.(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	X.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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