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Surface Effects on the Elastic Modulus of Te Nanowires

Published

Author(s)

Gheorghe Stan, Sergiy Krylyuk, Albert Davydov, Mark D. Vaudin, Leonid A. Bendersky, Robert F. Cook

Abstract

Nondestructive elastic property measurements have been performed on Te nanowires with diameters in the range 20 150 nm. By using contact resonance atomic force microscopy, the elastic indentation modulus perpendicular to the prismatic facets of the nanowires has been accurately quantified. In this diameter range, a pronounced size dependence of the modulus has been observed: an invariant value consistent with Te bulk properties for large wire diameters, followed by a nonlinear increase with decreasing diameter, and finally an almost doubling of the modulus for Te nanowires thinner than 30 nm. A model based on surface stiffening describes the observations.
Citation
Applied Physics Letters
Volume
92

Keywords

nanoscale mechanical properties, nanowires
Created June 17, 2008, Updated February 19, 2017