Carbon Dots-Inked Paper with Single/Two-Photon Excited Dual-Mode Thermochromic Afterglow for Advanced Dynamic Information Encryption.

Autor: Liu Y; Joint Key Laboratory of Ministry of Education, Institute of Applied Physics and Materials Engineering (IAPME), University of Macau, Taipa, Macau SAR, 999067, China., Cheng D; School of Mechanical Engineering, Jiangsu University, Zhenjiang, 212013, China., Wang B; Joint Key Laboratory of Ministry of Education, Institute of Applied Physics and Materials Engineering (IAPME), University of Macau, Taipa, Macau SAR, 999067, China., Yang J; Department of Physics and Chemistry, Faculty of Science and Technology, University of Macau, Taipa, Macau SAR, 999067, China., Hao Y; Department of Physics and Chemistry, Faculty of Science and Technology, University of Macau, Taipa, Macau SAR, 999067, China., Tan J; School of Mechanical Engineering, Institute of Technology for Carbon Neutralization, Yangzhou University, Yangzhou, 225009, China., Li Q; School of Mechanical Engineering, Institute of Technology for Carbon Neutralization, Yangzhou University, Yangzhou, 225009, China., Qu S; Joint Key Laboratory of Ministry of Education, Institute of Applied Physics and Materials Engineering (IAPME), University of Macau, Taipa, Macau SAR, 999067, China.; Department of Physics and Chemistry, Faculty of Science and Technology, University of Macau, Taipa, Macau SAR, 999067, China.
Jazyk: angličtina
Zdroj: Advanced materials (Deerfield Beach, Fla.) [Adv Mater] 2024 Aug; Vol. 36 (31), pp. e2403775. Date of Electronic Publication: 2024 May 25.
DOI: 10.1002/adma.202403775
Abstrakt: Achieving thermochromic afterglow (TCAG) in a single material for advanced information encryption remains a significant challenge. Herein, TCAG in carbon dots (CDs)-inked paper (CDs@Paper) is achieved by tuning the temperature-dependent dual-mode afterglow of room temperature phosphorescence (RTP) and thermally activated delayed fluorescence (TADF). The CDs are synthesized through thermal treatment of levofloxacin in melting boric acid with postpurification via dialysis. CDs@Paper exhibit both TCAG and excitation-dependent afterglow color properties. The TCAG of CDs@Paper exhibits dynamic color changes from blue at high temperatures to yellow at low temperatures by adjusting the proportion of the temperature-dependent TADF and phosphorescence. Notably, two-photon afterglow in CDs-based afterglow materials and time-dependent two-photon afterglow colors are achieved for the first time. Moreover, leveraging the opposite emission responses of phosphorescence and TADF to temperature, CDs@Paper demonstrate TCAG with temperature-sensing capabilities across a wide temperature range. Furthermore, a CDs@Paper-based 3D code containing color and temperature information is successfully developed for advanced dynamic information encryption.
(© 2024 The Author(s). Advanced Materials published by Wiley‐VCH GmbH.)
Databáze: MEDLINE
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