Pressure induced anisotropy of electrical conductivity in polycrystalline molybdenum disulfide

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Pressure induced anisotropy of electrical conductivity in polycrystalline molybdenum disulfide

Sanchez, V.; Benavente, Eglantina; O'Dwyer, Colm; Lavayen, Vladimir; Santa-Ana, María A.; Sotomayor Torres, Clivia M.; Gonzalez, Guillermo
Date: 2006-01
Copyright: Copyright © 2006, Elsevier. NOTICE: this is the author’s version of a work that was accepted for publication in Applied Surface Science. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Applied Surface Science [252, 22, 15 September 2006] DOI: http://dx.doi.org/10.1016/j.apsusc.2005.10.011
Related: http://www.sciencedirect.com/science/article/pii/S0169433205014753
Citation: V. Sánchez, E. Benavente, V. Lavayen, C. O’Dwyer, C.M. Sotomayor Torres, G. González, M.A. Santa Ana. (2006). 'Pressure induced anisotropy of electrical conductivity in polycrystalline molybdenum disulfide'. Applied Surface Science, Vol 252, Issue 22, pp. 7941-7947. 10.1016/j.apsusc.2005.10.011.
Published Version: 10.1016/j.apsusc.2005.10.011

Abstract:

Anisotropic specimens of MoS2 are obtained by pressing the microcrystalline powder into special die. This inelastic compression results in a rearrangement of the disulfide micro platelets observed by Atomic Force Microscopy and reflected in the macroscopic anisotropy in electrical conductivity in these samples. The conductivity measured parallel and perpendicular to the direction of applied pressure exhibits an anisotropy factor of ∼10 at 1 GPa. This behaviour of the conductivity as a function of applied pressure is explained as the result of the simultaneous influence of a rearrangement of the micro platelets in the solid and the change of the inter-grain distances.

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