Piezoresistive strain sensors made from carbon nanotubes based polymer nanocomposites

Alamusi, Ning Hu, Hisao Fukunaga, Satoshi Atobe, Yaolu Liu, Jinhua Li

Research output: Contribution to journalReview articlepeer-review

408 Citations (Scopus)

Abstract

In recent years, nanocomposites based on various nano-scale carbon fillers, such as carbon nanotubes (CNTs), are increasingly being thought of as a realistic alternative to conventional smart materials, largely due to their superior electrical properties. Great interest has been generated in building highly sensitive strain sensors with these new nanocomposites. This article reviews the recent significant developments in the field of highly sensitive strain sensors made from CNT/polymer nanocomposites. We focus on the following two topics: electrical conductivity and piezoresistivity of CNT/polymer nanocomposites, and the relationship between them by considering the internal conductive network formed by CNTs, tunneling effect, aspect ratio and piezoresistivity of CNTs themselves, etc. Many recent experimental, theoretical and numerical studies in this field are described in detail to uncover the working mechanisms of this new type of strain sensors and to demonstrate some possible key factors for improving the sensor sensitivity.

Original languageEnglish
Pages (from-to)10691-10723
Number of pages33
JournalSensors
Volume11
Issue number11
DOIs
Publication statusPublished - 2011 Nov

Keywords

  • Carbon nanotubes
  • Nanocomposites
  • Piezoresistivity
  • Strain sensor

ASJC Scopus subject areas

  • Analytical Chemistry
  • Atomic and Molecular Physics, and Optics
  • Biochemistry
  • Instrumentation
  • Electrical and Electronic Engineering

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