INVESTIGADORES
LEIVA Ezequiel Pedro M.
artículos
Título:
A kinetic model for the long term stability of contaminated monoatomic nanowires
Autor/es:
P. VÉLEZ; S. A. DASSIE; E. P. M. LEIVA
Revista:
PHYSICAL REVIEW B - CONDENSED MATTER AND MATERIALS PHYSICS
Editorial:
APS
Referencias:
Año: 2010 vol. 81 p. 1 - 12
ISSN:
0163-1829
Resumen:
The kinetic behavior of pure Au nanowires upon rupture is analyzed in comparison with that of nanowires
contaminated with H and C. The latter present larger activation energies for the rupture for all elongations and
as a consequence these contaminated wires are predicted to live longer, as observed experimentally. The kinetic
analysis is complemented by an analysis in terms of the concept of reaction force. It is found that this is the
relevant quantity to analyze when considering the stability of the nanowires in the limit of low elongations
rates or relatively high temperatures rather than the longitudinal force acting on the nanowire. The elastic and
electronic contributions to the rupture process are obtained for each system. While the latter are similar in all
cases, the elastic part is found to play the decisive role to make the difference. The present results suggest that
measurement of the force constant of the junction may help to determine the chemical nature of the impurity.