Wearable, Stretchable, Transparent All-in-One Soft Sensor Formed from Supersonically Sprayed Silver Nanowires

Hong Seok Jo, Seongpil An, Chan Woo Park, Deok Yoon Woo, Alexander Yarin, Sam S. Yoon

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

The demand for wearable, stretchable soft electronics for human-machine interface applications continues to grow given the potential of these devices in humanoid robotics, prosthetics, and health-monitoring devices. We demonstrate fabrication of multifunctional sensors with simultaneous temperature-, pressure-, proximity-, and strain (or bending)-sensing capabilities, combined with heating and UV-protection features. These multifunctional sensors are flexible, light, and transparent and are thus body-attachable. Silver nanowires are supersonically sprayed on a large-scale transparent and flexible roll-to-roll substrate. The junctions between nanowires are physically fused by a strong impact resulting from supersonic spraying, which promotes adhesion and efficient deposition of the nanowire network. Accordingly, nanowires are strongly interconnected, facilitating efficient propagation of electric signals through the fused nanowire network, which allows simultaneous operation of such sensors while maintaining significant transparency. These multifunctional sensors are mechanically durable and retain long-term stability. A theoretical discussion is provided to explain the respective mechanisms of heating and proximity, pressure, and strain sensing.

Original languageEnglish
Pages (from-to)40232-40242
Number of pages11
JournalACS Applied Materials and Interfaces
Volume11
Issue number43
DOIs
Publication statusPublished - 2019 Jul 22

Keywords

  • flexible
  • heater
  • multifunctional sensors
  • nanowires
  • supersonic spraying
  • transparent
  • UV protection
  • wearable

ASJC Scopus subject areas

  • Materials Science(all)

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