Bionic Fish-Scale Surface Structures Fabricated via Air/Water Interface for Flexible and Ultrasensitive Pressure Sensors

Jian Wang, Mizuki Tenjimbayashi, Yuki Tokura, Jun Yong Park, Koki Kawase, Jiatu Li, Seimei Shiratori

Research output: Contribution to journalArticlepeer-review

51 Citations (Scopus)

Abstract

In recent years, wearable and flexible sensors have attracted considerable research interest and effort owing to their broad application prospects in wearable devices, robotics, health monitoring, and so on. High-sensitivity and low-cost pressure sensors are the primary requirement in practical application. Herein, a convenient and low-cost process to fabricate a bionic fish-scale structure poly(dimethylsiloxane) (PDMS) film via air/water interfacial formation technique is presented. High-sensitivity flexible pressure sensors can be constructed by assembling conductive films of graphene nanosheets into a microstructured film. Thanks to the unique fish-scale structures of PDMS films, the prepared pressure sensor shows excellent performance with high sensitivity (-70.86% kPa-1). In addition, our pressure sensors can detect weak signals, such as wrist pulses, respiration, and voice vibrations. Moreover, the whole process of pressure sensor preparation is cost-effective, eco-friendly, and controllable. The results indicate that the prepared pressure sensor has a profitable and efficient advantage in future applications for monitoring human physiological signals and sensing subtle touch, which may broaden its potential applications in wearable devices.

Original languageEnglish
Pages (from-to)30689-30697
Number of pages9
JournalACS Applied Materials and Interfaces
Volume10
Issue number36
DOIs
Publication statusPublished - 2018 Sept 12

Keywords

  • air/water
  • e-skin
  • graphene nanoplatelet
  • pressure sensor
  • wearable devices

ASJC Scopus subject areas

  • General Materials Science

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