Triggering triplet excitons of carbon nanodots through nanospace domain confinement for multicolor phosphorescence in aqueous solution  

作　　者：Ya-Chuan Liang Qing Cao Yuan Deng Yong Wang Kai-Kai Liu Chong-Xin Shan 

机构地区：[1]School of Electronics and Information,Zhengzhou University of Light Industry,Zhengzhou 450002,China [2]Henan Key Laboratory of Diamond Optoelectronic Material and Devices,Key Laboratory of Material Physics,Ministry of Education,School of Physics and Microelectronics,Zhengzhou University,Zhengzhou 450001,China [3]Academy for Quantum Science and Technology,Zhengzhou University of Light Industry,Zhengzhou 450002,China [4]Institute of Quantum Materials and Physics,Henan Academy of Sciences,Zhengzhou 450046,China

出　　处：《Nano Research》2024年第7期6534-6543,共10页纳米研究（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.11904326,62075198,12274378,and 12304474);the Natural Science Foundation of Henan province(No.222300420087);the Henan Center for Outstanding Overseas Scientists(No.GZS201903);the Key Research and Promotion Projects in Henan Province(No.232102231033).

摘　　要：Easy non-radiative decay property of long-lived triplet excitons in aqueous solution obstructs their applications in aquatic surroundings.Recently reported phosphorescence phenomena in aqueous solution have excited researchers enormously but achieving full-color water-soluble phosphorescent carbon nanodots(CNDs)is still a challenging issue.Herein,full-color phosphorescence of water-soluble CNDs has been demonstrated by triggering their triplet excitons through nanospace domain confinement,and Förster energy resonance transfer is used for further tuning phosphorescence range.The phosphorescence spans across most of the visible spectrum,ranging from 400 to 700 nm.In an aqueous solution,the CNDs exhibits blue,green,and red phosphorescence,lasting for approximately 6,10,and 7 s,respectively.Correspondingly,the phosphorescence quantum yields are 11.85%,8.6%and 3.56%,making them readily discernible to the naked eyes and laying a solid foundation for practical application.Furthermore,phosphorescence flexible optical display and bioimaging have been demonstrated by using the multicolor CNDs-based nanomaterials,showing distinct superiority for accuracy and complete display and imaging in complex emission background.

关 键 词：carbon nanodots triplet excitons MULTICOLOR aqueous solution 

分 类 号：O64[理学—物理化学]