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<p>The rapid development of wearable electronics necessitates the advancement of strain sensors with both high sensitivity and stretchability for diverse applications, such as health monitoring and human–computer interaction. This study presents a highly sensitive and stretchable strain sensor fabricated through the synergistic integration of nested wrinkle-crack microstructures. The sensor is composed of a waterborne polyurethane film loaded with gold, featuring nested wrinkle structures. These structures are achieved by transferring wrinkles from a pre-fabricated polydimethylsiloxane template and further inducing compressive stress during magnetron sputtering. This design gives the sensor a large gauge factor of up to 7805.9, a stretchability of 60% strain range, and stability over 1000 stretch–release cycles. The sensor demonstrated its potential to monitor subtle physiological signals such as facial expressions, pulse, and voice recognition. This work provides important insights for the development of high-performance wearable electronic devices for smart health monitoring.</p> Graphical Abstract <p></p>

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A Highly Sensitive and Stretchable Strain Sensor Based on Nested Wrinkle Microstructures

  • 期刊论文

  • 发表日期：

    2025年1月9日

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  • Yuanhu Yan,
  • Chao Wang,
  • Yi He,
  • Qiyun Zhao,
  • Jingjing Huang,
  • Lang Ran,
  • Xun Liu,
  • Ying Li,
  • Lu Li

摘要

The rapid development of wearable electronics necessitates the advancement of strain sensors with both high sensitivity and stretchability for diverse applications, such as health monitoring and human–computer interaction. This study presents a highly sensitive and stretchable strain sensor fabricated through the synergistic integration of nested wrinkle-crack microstructures. The sensor is composed of a waterborne polyurethane film loaded with gold, featuring nested wrinkle structures. These structures are achieved by transferring wrinkles from a pre-fabricated polydimethylsiloxane template and further inducing compressive stress during magnetron sputtering. This design gives the sensor a large gauge factor of up to 7805.9, a stretchability of 60% strain range, and stability over 1000 stretch–release cycles. The sensor demonstrated its potential to monitor subtle physiological signals such as facial expressions, pulse, and voice recognition. This work provides important insights for the development of high-performance wearable electronic devices for smart health monitoring.

Graphical Abstract