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An ultra-sensitive resistive pressure sensor based on hollow-sphere microstructure induced elasticity in conducting polymer film.

Authors
  • Pan, Lijia
  • Chortos, Alex
  • Yu, Guihua
  • Wang, Yaqun
  • Isaacson, Scott
  • Allen, Ranulfo
  • Shi, Yi
  • Dauskardt, Reinhold
  • Bao, Zhenan
Type
Published Article
Journal
Nature Communications
Publisher
Springer Nature
Publication Date
Jan 01, 2014
Volume
5
Pages
3002–3002
Identifiers
DOI: 10.1038/ncomms4002
PMID: 24389734
Source
Medline
License
Unknown

Abstract

Pressure sensing is an important function of electronic skin devices. The development of pressure sensors that can mimic and surpass the subtle pressure sensing properties of natural skin requires the rational design of materials and devices. Here we present an ultra-sensitive resistive pressure sensor based on an elastic, microstructured conducting polymer thin film. The elastic microstructured film is prepared from a polypyrrole hydrogel using a multiphase reaction that produced a hollow-sphere microstructure that endows polypyrrole with structure-derived elasticity and a low effective elastic modulus. The contact area between the microstructured thin film and the electrodes increases with the application of pressure, enabling the device to detect low pressures with ultra-high sensitivity. Our pressure sensor based on an elastic microstructured thin film enables the detection of pressures of less than 1Pa and exhibits a short response time, good reproducibility, excellent cycling stability and temperature-stable sensing.

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