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<p>Conductive hydrogels are of interest in flexible and wearable sensors due to their unique stretchability, adaptability with the skin, and sensing performance. However, existing hydrogel sensors often struggle to simultaneously achieve satisfactory mechanical strength, robust self-adhesion, environmental stability, and excellent sensing performance. Here, a transparent silver nanoparticle(AgNPs)-enhanced conductive hydrogel sensor that synergistically combines these critical features within a platform is introduced. Dynamic hydrogen bonding, metal coordination, and electrostatic interactions in the network endow the hydrogel excellent adaptability and self-adhesion. The addition of AgNPs improves the conductivity and sensing sensitivity as well as enables antimicrobial properties of the hydrogel. The simultaneous interactions of glycerol and amphoteric ion betaine hydrochloride (BH) enhance the environmental stability by inhibiting crystallization of water molecules in the hydrogel at low temperatures and evaporation of water molecules at high temperatures. Furthermore, it is demonstrated that the hydrogel-based sensor can be securely mounted on the skin, accommodate dynamic body motions, precisely detect physiological signals such as joint flexion, pulse beating, and swallowing action with high sensitivity and wide linear range as well as electronic skin, highlighting its potential in wearable health monitoring applications.</p>

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Silver nanoparticle-enhanced multifunctional conductive hydrogel and the applications as highly sensitive and widely linear strain sensors

  • 期刊论文

  • 发表日期：

    2026年5月27日

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  • Jie Ren,
  • Wenjing Zhang,
  • Ziqiong Zhou,
  • Yu Wang,
  • Yan Li,
  • Wu Yang

摘要

Conductive hydrogels are of interest in flexible and wearable sensors due to their unique stretchability, adaptability with the skin, and sensing performance. However, existing hydrogel sensors often struggle to simultaneously achieve satisfactory mechanical strength, robust self-adhesion, environmental stability, and excellent sensing performance. Here, a transparent silver nanoparticle(AgNPs)-enhanced conductive hydrogel sensor that synergistically combines these critical features within a platform is introduced. Dynamic hydrogen bonding, metal coordination, and electrostatic interactions in the network endow the hydrogel excellent adaptability and self-adhesion. The addition of AgNPs improves the conductivity and sensing sensitivity as well as enables antimicrobial properties of the hydrogel. The simultaneous interactions of glycerol and amphoteric ion betaine hydrochloride (BH) enhance the environmental stability by inhibiting crystallization of water molecules in the hydrogel at low temperatures and evaporation of water molecules at high temperatures. Furthermore, it is demonstrated that the hydrogel-based sensor can be securely mounted on the skin, accommodate dynamic body motions, precisely detect physiological signals such as joint flexion, pulse beating, and swallowing action with high sensitivity and wide linear range as well as electronic skin, highlighting its potential in wearable health monitoring applications.