摘要

A double network chitosan‐based hydrogel with bulk conductivity, mechanical and electrical self‐healing properties, ultra‐stretchability and pressure sensitivity in chemical and physical crosslinking networks, together with ionic conductivity and polypyrrole networks is presented in article number 1700533 by Gaoxing Luo, Malcolm Xing, and co‐workers. Wirelessly connected via smart phone, this stretchable 3D‐printed sensor can monitor pulse and muscle motions.