Pressure/Temperature Dual-Responsive Cellulose Nanocrystal Hydrogels for On-Demand Schemochrome Patterning
作者：Xinkai Li, Jize Liu, and Xinxing Zhang*
關鍵字：cellulose nanocrystals, dual-responsive hydrogels, dynamic structural color, schemochrome patterning
論文來源：期刊
發表時間：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.