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Inspired by natural cryoprotection, we designed a hydrophilic deep eutectic solvent (DES) composed of acryloyloxyethyltrimethylammonium chloride (AETC) and urea. This DES\/H\n                    <jats:sub>2<\/jats:sub>\n                    O binary solvent was then polymerized into a multifunctional hydrogel via a facile one\u2010step photopolymerization. The dense hydrogen\u2010bonding network within the DES effectively confines the motion of water molecules, thereby endowing the hydrogel with exceptional anti\u2010freezing properties (down to \u221280\u00b0C) and long\u2010term moisture retention. The unique structural design, which features highly entangled polyelectrolyte chains and a dense network of dynamic sacrificial bonds that undergo breaking and reconstruction, enables the fabrication of an elastic hydrogel. Moreover, the as\u2010prepared PAETC\u2010urea hydrogels exhibit high transparency (95%), remarkable stretchability (&gt;3000% elongation), strong adhesion to various engineering substrates, and efficient self\u2010healing capability. These collective features ensure the reliable performance as a wearable strain sensor for accurately detecting human motions and high\u2010fidelity electrophysiological signals, demonstrating great potential for next\u2010generation flexible electronics.\n                  <\/jats:p>","DOI":"10.1002\/smll.74284","type":"journal-article","created":{"date-parts":[[2026,6,23]],"date-time":"2026-06-23T17:33:24Z","timestamp":1782236004000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Deep Eutectic Solvent Based Multifunctional Hydrogels for Strain Sensing and Electrophysiological Signal Monitoring"],"prefix":"10.1002","volume":"22","author":[{"given":"Shanlei","family":"Chang","sequence":"first","affiliation":[{"name":"College of Chemistry Jilin University  Changchun Jilin P. R. 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