Ultra-stretchable and skin-mountable strain sensors using carbon nanotubes-Ecoflex nanocomposites

Morteza Amjadi, Yong Jin Yoon, Inkyu Park

Research output: Contribution to journalArticlepeer-review

378 Citations (Scopus)

Abstract

Super-stretchable, skin-mountable, and ultra-soft strain sensors are presented by using carbon nanotube percolation network-silicone rubber nanocomposite thin films. The applicability of the strain sensors as epidermal electronic systems, in which mechanical compliance like human skin and high stretchability ( > 100%) are required, has been explored. The sensitivity of the strain sensors can be tuned by the number density of the carbon nanotube percolation network. The strain sensors show excellent hysteresis performance at different strain levels and rates with high linearity and small drift. We found that the carbon nanotube-silicone rubber based strain sensors possess super-stretchability and high reliability for strains as large as 500%. The nanocomposite thin films exhibit high robustness and excellent resistance-strain dependency for over ∼1380% mechanical strain. Finally, we performed skin motion detection by mounting the strain sensors on different parts of the body. The maximum induced strain by the bending of the finger, wrist, and elbow was measured to be ∼ 42%, 45% and 63%, respectively.

Original languageEnglish
Article number375501
JournalNanotechnology
Volume26
Issue number37
DOIs
Publication statusPublished - 18 Sep 2015

Keywords

  • carbon nanotube
  • human motion detection
  • nanocomposite
  • stretchable sensor
  • wearable sensor

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Electrical and Electronic Engineering

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