Enhanced Aggregation-Induced Phosphorescence of Carbon Dots for Information Encryption Applications

被引：12

作者：

Chao, Tianyu ^{[1
,2
,3
]}

Dong, Xuezhe ^{[2
]}

Wang, Jingjing ^{[1
,2
]}

Song, Rui ^{[1
]}

Xie, Zheng ^{[2
]}

Zhou, Shuyun ^{[2
]}

机构：

[1] Univ Chinese Acad Sci, Sch Chem Sci, Beijing 100049, Peoples R China

[2] Chinese Acad Sci, Tech Inst Phys & Chem, Key Lab Photochem Convers & Optoelect Mat, Beijing 100190, Peoples R China

[3] Univ Chinese Acad Sci, Sino Danish Ctr Educ & Res, Beijing 100049, Peoples R China

来源：

ACS APPLIED NANO MATERIALS | 2022年 / 5卷 / 10期

基金：

中国国家自然科学基金;

关键词：

carbon dots; room-temperature phosphorescence; aggregation-induced phosphorescence; hybrid material; information encryption; ROOM-TEMPERATURE PHOSPHORESCENCE; GRAPHENE OXIDE;

D O I：

10.1021/acsanm.2c03785

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Aggregation-induced phosphorescence (AIP) has attracted much attention for its unique luminescent characteristics. Nevertheless, this fascinating phenomenon is rarely reported in the field of carbon dots (CDs). Herein, a simple method to prepare CDs simultaneously with dispersion-state fluorescence, aggregation-state fluorescence, and phosphorescence is presented by a one-step solvothermal process. The resultant AIP CDs (A-CDs) display a long afterglow lifetime of 0.51 s in the aggregation state, lasting about 5 s to the naked eye. The phosphorescence emission of A-CDs resulted from the rigid, protective structure due to the aggregation state. In addition, inorganic silica has been employed as a doping matrix to effectively improve phosphorescent properties (1.11 s). Benefitting from the unique luminescence feature and excellent water dispersibility, the A-CDs can be dispersed directly in water, and the phosphorescent emission could be controlled by regulating the concentration, thus enabling information encryption.

引用

页码：15720 / 15727

页数：8

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