Photocurrent properties of freely suspended carbon nanotubes under uniaxial strain

Kaniber, S. M.; Song, L.; Kotthaus, J. P.; Holleitner, A. W.
June 2009
Applied Physics Letters;6/29/2009, Vol. 94 Issue 26, p261106
Academic Journal
The photocurrent properties of freely suspended single-walled carbon nanotubes (CNTs) are investigated as a function of uniaxial strain. We observe that at low strain, the photocurrent signal of the CNTs increases for increasing strain, while for large strain, the signal decreases, respectively. We interpret the nonmonotonous behavior by a superposition of the influence of the uniaxial strain on the resistivity of the CNTs and the effects caused by Schottky contacts between the CNTs and the metal contacts.


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