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

doi:10.1039/c9nr05123f

CORC > 长春光学精密机械与物理研究所 > 中国科学院长春光学精密机械与物理研究所 > 中科院长春光机所知识产出

	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
刊名	Nanoscale
	2019
卷号	11 期号:30 页码:14250-14255
关键词	quantum dots,Chemistry,Science & Technology - Other Topics,Materials Science,Physics
ISSN号	2040-3364
DOI	10.1039/c9nr05123f
英文摘要	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.
URL标识	查看原文
语种	英语
内容类型	期刊论文
源URL	[http://ir.ciomp.ac.cn/handle/181722/63476]
专题	长春光学精密机械与物理研究所_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.