Change in spatial distribution of state densities of carbon nanotubes under anisotropic strain field

Masato Ohnishi, Yang Meng, Ken Suzuki, Hideo Miura

Research output: Contribution to conferencePaperpeer-review

6 Citations (Scopus)

Abstract

In any electronic devices and sensors, unexpected changes in their function occur due to internal strain caused by contact of different materials which leads to thermal deformation or lattice mismatch. Thus, understanding of the effect of strain on electronic properties of carbon nanotubes (CNTs) is indispensable for assuring the reliability of CNTs-based electronic devices and for developing new electronic devices and sensors. In this study, the change in spatial distribution of state densities of zigzag CNTs under radial strain is analyzed by using first-principles calculation. The analysis shows that when a radial strain is applied to a CNT, its state densities are localized at high curvature regions. Such localization of state densities decrease their energies, and then decrease the band gap. In addition, since the behavior of the state energy under the radial strain is dominated by its spatial distribution, the strain sensitivity of CNTs depends on their chirality. The founding gives a guideline on how to fabricate highperformance novel CNTs devices, sensors, for example, biaxial strain sensor.

Original languageEnglish
DOIs
Publication statusPublished - 2014 Jan 1
EventASME 2014 International Mechanical Engineering Congress and Exposition, IMECE 2014 - Montreal, Canada
Duration: 2014 Nov 142014 Nov 20

Other

OtherASME 2014 International Mechanical Engineering Congress and Exposition, IMECE 2014
CountryCanada
CityMontreal
Period14/11/1414/11/20

ASJC Scopus subject areas

  • Mechanical Engineering

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