INVESTIGADORES
DEL POPOLO Mario Gabriel
artículos
Título:
Computer simulations of distance changes in nanogaps
Autor/es:
C. F. NARAMBUENA, M. G. DEL POPOLO, E.P.M. LEIVA
Revista:
Journal of the Argentine Chemical Society
Editorial:
ASOCIACIÓN QUÍMICA ARGENTINA
Referencias:
Año: 2003 vol. 91 p. 55 - 62
ISSN:
0365-0375
Resumen:
In the present work we employ computational techniques to analyze some geometrical aspects of the electrochemical dissolution of a copper deposit generated on the tip of a Scanning Tunnel Microscope (STM). The electrode where the dissolution occurs is approximated by a metal cluster and the surface of the substrate is emulated by a geometrical plane. The simulations employ a simple computational model (based on energetic considerations) and the embedded atom method. It was found that the width of the nanogap (D) between the STM tip and the surface should vary in a discrete way, with a distribution of increments that is maximal between 0.1 and 0.4 Angstroms. This is close to the experimental observation.
