Physical Sciences Division
Published November 24, 2021 | Version v1
Journal article Open

A stretchable and strain-unperturbed pressure sensor for motion interference-free tactile monitoring on skins

Creators

  • 1. University of Chicago
  • 2. Tianjin University
  • 3. University of California, Los Angeles
  • 4. Argonne National Laboratory

Description

A stretchable pressure sensor is a necessary tool for perceiving physical interactions that take place on soft/ deformable skins present in human bodies, prosthetic limbs, or soft robots. However, all existing types of stretchable pressure sensors have an inherent limitation, which is the interference of stretching with pressure sensing accuracy. Here, we present a design for a highly stretchable and highly sensitive pressure sensor that can provide unaltered sensing performance under stretching, which is realized through the synergistic creations of an ionic capacitive sensing mechanism and a mechanically hierarchical microstructure. Via this optimized structure, our sensor exhibits 98% strain insensitivity up to 50% strain and a low pressure detection limit of 0.2 Pa. With the capability to provide all the desired characteristics for quantitative pressure sensing on a deformable surface, this sensor has been used to realize the accurate sensation of physical interactions on human or soft robotic skin.

Data availability

All data needed to evaluate the conclusions in the paper are present in the paper and/or the Supplementary Materials.

Files

sciadv.abi4563.pdf

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Additional details

Identifiers

DOI
10.1126/sciadv.abi4563
Other
oai:uchicago.tind.io:10950

Funding

National Science Foundation
DMR-2011854
Office of Naval Research
N00014-21-1-2581
U.S. Department of Energy
N00014-21-1-2581
U.S. Department of Energy
DE-AC02-06CH11357
University of Chicago
State of Maine Department of Marine Resources

UChicago Information

Division(s)
Physical Sciences Division, Pritzker School of Molecular Engineering
Department(s)
Computer Science