Anisotropic strain-field-induced change of the electronic conductivity of graphene sheets and carbon nanotubes

Masato Ohnishi, Hiroshi Kawakami, Yusuke Suzuki, Ken Suzuki, Hideo Miura

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Since the discovery of carbon nanotubes (CNTs), there have been many efforts to develop various electronic devices and sensors. The authors have also validated the possibility of a highly sensitive strain sensor using popular resin in which multi-walled CNTs (MWNTs) were dispersed uniformly. It is, however, indispensable for clarifying how to change the electronic state of a deformed CNT for assuring the stable performance of the sensor because the reported sensitivity has ranged widely. In this study, the relationship between the deformation characteristic of a CNT under strain and its electronic conductivity was analyzed quantitatively. The analysis result obtained from density functional theory (DFT) calculation showed that the orbital hybridization was occured when the local curvature exceeded about 0.3 Å-1, inducing the decrease in the band gap. Based on the analytical results, a twodimensional strain sensor was developed by applying buckling deformation-induced conductivity change of MWNTs by using MEMS technology.

Original languageEnglish
Title of host publicationASME 2012 International Mechanical Engineering Congress and Exposition, IMECE 2012
Pages749-754
Number of pages6
EditionPARTS A AND B
DOIs
Publication statusPublished - 2012 Dec 1
EventASME 2012 International Mechanical Engineering Congress and Exposition, IMECE 2012 - Houston, TX, United States
Duration: 2012 Nov 92012 Nov 15

Publication series

NameASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE)
NumberPARTS A AND B
Volume9

Other

OtherASME 2012 International Mechanical Engineering Congress and Exposition, IMECE 2012
CountryUnited States
CityHouston, TX
Period12/11/912/11/15

ASJC Scopus subject areas

  • Mechanical Engineering

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