Differentiation of Multiple Mechanical Stimuli by a Flexible Sensor Using a Dual-Interdigital-Electrode Layout for Bodily Kinesthetic Identification

Xin Li, Jinwei Cao, Huayang Li, Pengtao Yu, Youjun Fan, Yuchuan Xiao, Yiming Yin, Xuejiao Zhao, Zhong Lin Wang, Guang Zhu

Research output: Journal PublicationArticlepeer-review

4 Citations (Scopus)

Abstract

Human bodily kinesthetic sensing is generally complicated and ever-changing due to the diversity of body deformation as well as the complexity of mechanical stimulus, which is different from the unidirectional mechanical motion. So, there exists a huge challenge for current flexible sensors to accurately differentiate and identify what kind of external mechanical stimulus is exerted via analyzing digital signals. Here, we report a flexible dual-interdigital-electrode sensor (FDES) that consists of two interdigital electrodes and a highly pressure-sensitive porous conductive sponge. The FDES can precisely identify multiple mechanical stimuli, e.g., pressing, positive bending, negative bending, X-direction stretching, and Y-direction stretching, and convert them into corresponding current variation signals. Moreover, the FDES exhibits other exceptional properties, such as high sensitivity, stretchability, large measurement range, and outstanding stability, accompanied by simple structural design and low-cost processing simultaneously. Additionally, our FDES successfully identifies various complex activities of the human body, which lays a foundation for the further development of multimode flexible sensors.

Original languageEnglish
Pages (from-to)26394-26403
Number of pages10
JournalACS applied materials & interfaces
Volume13
Issue number22
DOIs
Publication statusPublished - 9 Jun 2021

Keywords

  • bodily kinesthetic identification
  • flexible sensors
  • interdigital electrodes
  • multiple mechanical stimuli
  • resistance effect

ASJC Scopus subject areas

  • Materials Science (all)

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