Applied Physics A

, Volume 109, Issue 1, pp 127–132

Deformation-driven electrical transport in amorphous TiO2 nanotubes

  • A. Asthana
  • T. Shokuhfar
  • Q. Gao
  • P. A. Heiden
  • R. S. Yassar
Article

DOI: 10.1007/s00339-012-7040-1

Cite this article as:
Asthana, A., Shokuhfar, T., Gao, Q. et al. Appl. Phys. A (2012) 109: 127. doi:10.1007/s00339-012-7040-1

Abstract

A series of in situ transmission electron microscopy combined with scanning tunneling microscopy measurements were carried out to investigate the effect of mechanical deformation on the electrical transport properties of amorphous TiO2 nanotubes. Under no mechanical straining, it was found that the TiO2 nanotubes behave as electrical insulators. However, the nanotubes show semiconducting behavior under a highly deformed state. On the basis of a metal–semiconductor–metal model, it was suggested that in-shell defects, surface defect-driven conduction modes, are responsible for the appearance of the semiconducting behavior.

Copyright information

© Springer-Verlag 2012

Authors and Affiliations

  • A. Asthana
    • 1
  • T. Shokuhfar
    • 2
  • Q. Gao
    • 2
  • P. A. Heiden
    • 3
  • R. S. Yassar
    • 2
  1. 1.Department of Materials Science and EngineeringMichigan Technological UniversityHoughtonUSA
  2. 2.Department of Mechanical Engineering–Engineering MechanicsMichigan Technological UniversityHoughtonUSA
  3. 3.Department of ChemistryMichigan Technological UniversityHoughtonUSA

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