A Dual-Responsive Liquid Crystal Elastomer for Multi-Level Encryption and Transient Information Display.

Autor: Wang HQ; State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, 210023, Nanjing, China., Tang Y; Institute of Advanced Materials and School of Chemistry and Chemical Engineering, Southeast University, 211189, Nanjing, China., Huang ZY; State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, 210023, Nanjing, China., Wang FZ; State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, 210023, Nanjing, China., Qiu PF; State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, 210023, Nanjing, China., Zhang X; Materials Science Graduate Program, Kent State University, 44242, Kent, Ohio, USA., Li CH; State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, 210023, Nanjing, China., Li Q; Institute of Advanced Materials and School of Chemistry and Chemical Engineering, Southeast University, 211189, Nanjing, China.; Materials Science Graduate Program, Kent State University, 44242, Kent, Ohio, USA.
Jazyk: angličtina
Zdroj: Angewandte Chemie (International ed. in English) [Angew Chem Int Ed Engl] 2023 Nov 27; Vol. 62 (48), pp. e202313728. Date of Electronic Publication: 2023 Oct 23.
DOI: 10.1002/anie.202313728
Abstrakt: Information security has gained increasing attention in the past decade, leading to the development of advanced materials for anti-counterfeiting, encryption and instantaneous information display. However, it remains challenging to achieve high information security with simple encryption procedures and low-energy stimuli. Herein, a series of strain/temperature-responsive liquid crystal elastomers (LCEs) are developed to achieve dual-modal, multi-level information encryption and real-time, rewritable transient information display. The as-prepared polydomain LCEs can change from an opaque state to a transparent state under strain or temperature stimuli, with the transition strains or temperatures highly dependent on the concentration of long-chain flexible spacers. Information encrypted by different LCE inks can be decrypted under specific strains or temperatures, leading to multi-level protection of information security. Furthermore, with the combination of the phase transition of polydomain LCEs and the photothermal effect of multi-walled carbon nanotubes (MWCNTs), we achieved a repeatable transient information display by using near-infrared (NIR) light as a pen for writing. This study provides new insight into the development of advanced encryption materials with versatility and high security for broad applications.
(© 2023 Wiley-VCH GmbH.)
Databáze: MEDLINE
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