Wearable Triboelectric Strain-Insensitive Pressure Sensors Based on Hierarchical Superposition Patterns

Ho Jung Lee, Kyoung Yong Chun, Jun Ho Oh, Chang Soo Han

Research output: Contribution to journalArticlepeer-review

Abstract

Recently, wearable triboelectric sensors capable of self-powering, which can be widely used in artificial skin and robotics, have received much attention. Herein, we develop a stretchable triboelectric pressure sensor with a new pattern by superimposing two patterns using both polystyrene beads and UV-ozone treatment. This patterned structure works more sensitively to pressure than a general planar and one-kind patterned structure. The sensor is constructed by sandwiching styrene butadiene rubber (SBR) and poly(dimethylsiloxane) (PDMS). It demonstrates a high sensitivity of 0.078 kPa-1 (0-20 kPa), a low detection limit (1.2 kPa), and pressure sensitivity maintained under 40% strain. The detection behavior of the strain-insensitive triboelectric sensor against pressure is very consistent with the simulation based on the theory. In applications, we successfully detect various human motions, not only small motions such as bending fingers but also large motions such as standing up and raising arms.

Original languageEnglish
Pages (from-to)2411-2418
Number of pages8
JournalACS Sensors
Volume6
Issue number6
DOIs
Publication statusPublished - 2021 Jun 25

Keywords

  • human motion
  • pressure sensor
  • stretchable
  • superposition pattern
  • triboelectric
  • wearable

ASJC Scopus subject areas

  • Bioengineering
  • Instrumentation
  • Process Chemistry and Technology
  • Fluid Flow and Transfer Processes

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