Issue 34, 2024

Na+: the key to ultra-long afterglow lifetimes of CDs in dense SiO2 matrices

Abstract

Carbon dot-based room-temperature phosphorescence materials have emerged as a shining new star in the carbon nanomaterial family in recent years due to their excellent optical properties. However, there still exists a significant challenge in obtaining carbon dots (CDs) with ultra-long phosphorescence lifetimes. In this study, tetraethyl orthosilicate (TEOS) was used to achieve in situ growth and encapsulation of CDs in a 3D SiO2 network using a one-pot hydrothermal method. It was demonstrated that Na+ is the key factor to achieve ultra-long afterglow lifetimes of CDs in dense SiO2 matrices, and the introduction of Na+ has a significant effect on extending the afterglow lifetime of various CDs. The designed Na/CDs@SiO2 nanomaterial exhibited an ultra-long afterglow lifetime of 6.69 s, which surpassed most reported CD-based afterglow lifetimes. This work provides a design principle and general strategy for achieving ultra-long afterglow lifetimes of CDs in dense SiO2 matrices. Due to the stable photoluminescence (PL) properties, low biotoxicity, and ultra-long afterglow lifetime of the Na/CDs@SiO2 nanomaterial, it was successfully applied in HeLa cell imaging.

Graphical abstract: Na+: the key to ultra-long afterglow lifetimes of CDs in dense SiO2 matrices

Supplementary files

Article information

Article type
Paper
Submitted
02 7 2024
Accepted
07 8 2024
First published
08 8 2024

J. Mater. Chem. C, 2024,12, 13681-13688

Na+: the key to ultra-long afterglow lifetimes of CDs in dense SiO2 matrices

Y. Luo, Q. Jiang, X. Huang, J. Dong, Y. Zhou, F. Huang, X. Liao, J. Zhuang, C. Hu, M. Zheng, B. Lei, Y. Liu and J. He, J. Mater. Chem. C, 2024, 12, 13681 DOI: 10.1039/D4TC02795G

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