writer：Jize Liu, Quanquan Guo, Xinxing Zhang,* Jinggang Gai, and Chuhong Zhang*
keywords：drogel, intelligent devices, light-writing, liquid metal, stimulus,responsive materials
source：期刊
specific source：Advanced Functional Materials
Issue time：2021年

Stimulus-responsive materials with designable integrated functions bridge

the intelligent systems in future lifestyles with the Internet of Things (IoT).

The growing trend for IoT and corresponding advanced devices will involve

a great number of electronic disposables, which may place heavy burdens

on the environment. Here, an elaborately designed multistage responsive

material is reported for real-time, reversible light-writing based on organized

stage-by-stage responsive behaviors and polarity-dependent physicochemical

fluorescence response, where the stimulus is accurately delivered through

a completely reversible “light-heat-fluorescence” pathway. The resulted

materials can be pollution-freely written by hand-controlled near-infrared laser

within 5 s, spontaneously erased within 20 s, and exhibit excellent re-writing

ability (more than 5000 times while the variance of chromaticity coordinates

<0.0008), which is difficult to achieve by traditional laser writing technologies.

This study is a step toward high-performance long-life functional devices

based on reversible multistage responsive materials for future IoT lifestyles.