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<p>Hydrogels are crucial for soft bioelectronics in long-term health monitoring; however, reconciling skin comfort with environmental resilience remains a major challenge. We present a 392 nm-thick organohydrogel nanofilm electrode that mimics skin deformation, offers high gas/water vapor/sweat permeability and heat transfer, and remains functional under various extreme conditions. The electrode comprises a genipin-crosslinked gelatin matrix, reinforced by polyurethane nanomeshes and plasticized with a glycerol/sodium chloride/tannic acid electrolyte. It achieves ultralow flexural rigidity (8.7 × 10<sup>−11</sup> nN·m), high stretchability (166.3% strain), toughness (3.0 MJ m<sup>−3</sup>), adhesion (365.8 µJ cm<sup>−2</sup>), and durability (1000 cycles at 100% strain). Solvent replacement strategies suppress ice formation and evaporation, preserving its physical and electrical performance under extreme conditions (−80–150 °C, 2% relative humidity, vacuum) and 200-day ambient storage. The organohydrogel nanofilm electrodes record stable electrocardiograms for 9 consecutive days with superior resistance to motion and sweat artifacts, offering a resilient platform for skin-integrated bioelectronics.</p>

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Sub-400 nanometer-thick skin and environment adaptable organohydrogel nanofilm epidermal electrode

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年11月18日

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  • Zonglei Wang,
  • Yuli Wang,
  • Jiawei Yang,
  • Pengcheng Zhou,
  • Wenqing Yan,
  • Shihong Lin,
  • Yujie Zhang,
  • Qingyuan Sun,
  • Yumiao Xu,
  • Zichong Ji,
  • Mingzhe Wang,
  • Zongman Zhang,
  • Junhong Yi,
  • Meiqiong Zheng,
  • Xuezhong He,
  • Lulu Sun,
  • Sunghoon Lee,
  • Tomoyuki Yokota,
  • Hossam Haick,
  • Takao Someya,
  • Yan Wang

摘要

Hydrogels are crucial for soft bioelectronics in long-term health monitoring; however, reconciling skin comfort with environmental resilience remains a major challenge. We present a 392 nm-thick organohydrogel nanofilm electrode that mimics skin deformation, offers high gas/water vapor/sweat permeability and heat transfer, and remains functional under various extreme conditions. The electrode comprises a genipin-crosslinked gelatin matrix, reinforced by polyurethane nanomeshes and plasticized with a glycerol/sodium chloride/tannic acid electrolyte. It achieves ultralow flexural rigidity (8.7 × 10−11 nN·m), high stretchability (166.3% strain), toughness (3.0 MJ m−3), adhesion (365.8 µJ cm−2), and durability (1000 cycles at 100% strain). Solvent replacement strategies suppress ice formation and evaporation, preserving its physical and electrical performance under extreme conditions (−80–150 °C, 2% relative humidity, vacuum) and 200-day ambient storage. The organohydrogel nanofilm electrodes record stable electrocardiograms for 9 consecutive days with superior resistance to motion and sweat artifacts, offering a resilient platform for skin-integrated bioelectronics.