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

ACS Sensors
Ho Jung LeeChang-Soo Han

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.

References

Sep 14, 2010·Nature Materials·Stefan C B MannsfeldZhenan Bao
Nov 22, 2011·Journal of the Mechanical Behavior of Biomedical Materials·Aisling Ní AnnaidhMélanie Otténio
Feb 26, 2019·Nature Biotechnology·Jayoung KimJoseph Wang

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