Surface Effect On The Mechanical Property Of Metal Nanowire
Author(s)
H. A. Wu, G. R. Liu & J. S. Wang
Abstract
Surface effect on the mechanical property of
metal nanowire
H. A. Wu, G. R. Liu & J . S. Wang
Singapore-MIT Alliance (SM), Singapore
Abstract
Computer sinlulations have been carried out to determine the surface effect on
the mechanical property of single crystal copper nanowire using the molecular
dynamics method. The embedded-atom potential for copper developed by
Doyama is employed to represent the atomic interactions. The Gear predictioncorrection
algorithm, used to integrate Newton's equations of motion, uses up to
the 5'th time derivative of the atom positions. The initial atomic configuration of
copper nanowire is in accordance with face-centered cubic (fcc) structure of
single crystal bulk. The length direction of nanowire is assumed to be infinite by
applying period boundary conditions, while the other two are free surfaces. The
nanowire is then freely relaxed to reach a stable state with minimum energy.
During this loading-free relaxation process, surface atoms will move, resulting
fr
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