Ren Weijia, Jing Houchao, Ding Shengyong, Dan Junyan, Xu Zhijun, Guo Tongkun, Wei Hua, Liu Yue, Liu Yaqing
Key Laboratory of Colloid and Interface Chemistry of the Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan, Shandong, 250100, P. R. China.
Research Center of Biomedical Sensing Engineering Technology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, P. R. China.
Small. 2024 Nov;20(46):e2404874. doi: 10.1002/smll.202404874. Epub 2024 Jul 31.
Ionic diodes with environmentally modulated ion-rectifying characteristics have attracted much attention and show great promise in the construction of smart devices with environmental adaptability. One immediate challenge is to integrate stimuli responsiveness and ion rectification into one single ionic diode, which requires a close cooperation of chemical principles and device technologies. Herein, an ionic diode based on a photoresponsive hydrogel with optically mediated ion-rectifying performances is introduced. Relying on the photoresponsive concentration of proton in the hydrogel, the ionic current rectification can be prominently enhanced upon ultraviolet (UV) irradiation. A maximum ionic current rectification ratio of the optically mediated ionic diode about 4 × 10 is achieved. Furthermore, the hydrogel-based diode can serve as an AND logic gate operated by UV light and voltage bias as two independent inputs. As a proof of concept, to use the optically mediated diode is achieved to modulate the feedback of a robot with logic behaviors. This work provides a novel and valuable strategy for designing functional hydrogel-based devices with the integration of stimuli-responsiveness and logic signal processing through chemical approaches.
具有环境调制离子整流特性的离子二极管已引起广泛关注，并在构建具有环境适应性的智能设备方面展现出巨大潜力。一个紧迫的挑战是将刺激响应性和离子整流整合到单个离子二极管中，这需要化学原理和器件技术的紧密配合。在此，我们介绍一种基于光响应水凝胶的离子二极管，其具有光介导的离子整流性能。依靠水凝胶中质子的光响应浓度，在紫外光照射下离子电流整流可显著增强。实现了光介导离子二极管的最大离子电流整流比约为4×10。此外，基于水凝胶的二极管可作为由紫外光和电压偏置作为两个独立输入操作的与逻辑门。作为概念验证，利用光介导二极管实现了对具有逻辑行为的机器人反馈的调制。这项工作通过化学方法为设计集成刺激响应性和逻辑信号处理的功能性水凝胶基器件提供了一种新颖且有价值的策略。
