Stretchable hydrogels are developed to interact with biological interfaces through ionic signaling. However, the intelligence of artificial hydrogels is far less powerful than biological systems. There is no channel to mediate complex ion flows in signal transduction, and thus the existing bulk hydrogels lack the ability to process and memorize information in a logical manner. Herein, inspired by the biological ion channels, we develop asymmetric “trimeric” hydrogels to control the spatiotemporal distribution of ion flows. The hydrogels can sense external stimuli, encode logical responses, emulate synaptic plasticity, and even memorize images in a multistore model. More intriguingly, they are transparent, stretchable, and work stably under large deformation. They overcome the optical and mechanical limitations encountered by conventional electronic devices. The bionic design paves an avenue for intelligent hydrogel ionotronics and will bridge the gap between human-machine interfaces.

开发可拉伸水凝胶以通过离子信号与生物界面相互作用。然而，人造水凝胶的智能远不如生物系统强大。在信号转导中没有介导复杂离子流的通道，因此现有的散装水凝胶缺乏以逻辑方式处理和记忆信息的能力。在此，受生物离子通道的启发，我们开发了不对称的“三聚体”水凝胶来控制离子流的时空分布。水凝胶可以感知外部刺激、编码逻辑反应、模拟突触可塑性，甚至可以在多存储模型中记忆图像。更有趣的是，它们是透明的、可拉伸的，并且在大变形下也能稳定工作。它们克服了传统电子设备遇到的光学和机械限制。仿生设计为智能水凝胶离子电子学铺平了道路，并将弥合人机界面之间的差距。