4.8 Article

Epidermis-Inspired Wearable Piezoresistive Pressure Sensors Using Reduced Graphene Oxide Self-Wrapped Copper Nanowire Networks

期刊

SMALL METHODS
卷 6, 期 1, 页码 -

出版社

WILEY-V C H VERLAG GMBH
DOI: 10.1002/smtd.202100900

关键词

bioinspired microstructures; core-shell nanowires; electronic skin; flexible transparent electrodes; piezoresistive sensors; wearable electronics

资金

  1. National Institutes of Health [CA214411, AR074234, GM126571, TR003148]
  2. National Science Foundation [CHE-1654794]

向作者/读者索取更多资源

A low-cost, scalable, and high-performance piezoresistive sensor has been developed with high sensitivity, extensive sensing range, fast response time, and excellent long-term stability. The sensor's piezoresistive functionality is achieved through a flexible transparent electrode using stable reduced graphene oxide self-wrapped copper nanowire network. The developed sensor is suitable for wearable electronics applications.
Wearable piezoresistive sensors are being developed as electronic skins (E-skin) for broad applications in human physiological monitoring and soft robotics. Tactile sensors with sufficient sensitivities, durability, and large dynamic ranges are required to replicate this critical component of the somatosensory system. Multiple micro/nanostructures, materials, and sensing modalities have been reported to address this need. However, a trade-off arises between device performance and device complexity. Inspired by the microstructure of the spinosum at the dermo epidermal junction in skin, a low-cost, scalable, and high-performance piezoresistive sensor is developed with high sensitivity (0.144 kPa(-1)), extensive sensing range (0.1-15 kPa), fast response time (less than 150 ms), and excellent long-term stability (over 1000 cycles). Furthermore, the piezoresistive functionality of the device is realized via a flexible transparent electrode (FTE) using a highly stable reduced graphene oxide self-wrapped copper nanowire network. The developed nanowire-based spinosum microstructured FTEs are amenable to wearable electronics applications.

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