作者：Xinkai Li, Jize Liu, and Xinxing Zhang*
关键字：cellulose nanocrystals, dual-responsive hydrogels, dynamic structural color, schemochrome patterning
论文来源：期刊
发表时间：2024年

Cellulose nanocrystal (CNC) based optical devices with adjustable

schemochrome have attracted immense interest. However, most of the

previously reported structural colored CNC-based materials can only achieve

simple stress-induced color change, which have di?culty achieving

multimode control of complex patterning that can be accurately identi?ed.

Here, inspired by the nanostructure-based color-changing mechanism of

neon tetra, this study presents a pressure/temperature dual-responsive

CNC-based schemochrome hydrogel with adjustable dynamic chiral nematic

structure. By incorporating abundant interfacial noncovalent interactions,

dynamic correlations between adjustable helical pitch of the vertically stacked

cholesteric liquid crystalline (LC) phase and responsiveness of ?exible

thermosensitive substrate are established, which further enable wide-range

optical characteristic (12°–213° in HSV color model and 421–734 nm in the

UV–Vis spectra) and identi?able visualized patterning. The resultant

hydrogels are applied in proof-of-concept demonstrations of on-demand

schemochrome patterning, including customizable patterned dual-encryption

label, smart digital display, temperature monitor, and intelligent

recognition/control system. This study envisages that the bioinspired

construction of structural colored nanomaterials will have promising

applications in smart responsive photonic equipment including smart display,

anticounterfeiting, and intelligent control systems.