Resents Advanced on Stability of Low Dimensional Metallic Nanostructures

O. A. OVIEDO, E. P. M. LEIVA

Edinburgh, England

Otro; 57th Annual Meeting of the International Society of Electrochemistry; 2006

International Society of Electrochemistry

Resents Advanced on Stability of Low Dimensional Metallic Nanostructures.

 Oviedo O. A. and Leiva E. P. M.

Unidad de Matemática y Física Facultad de Ciencias Químicas, INFIQC, Universidad Nacional de Córdoba, Ciudad Universitaria, 5000 Córdoba, Argentina.

The formation of metallic nanostructures on foreign metal and semiconductor surfaces plays an important role in modern nanoelectrochemistry. The usual formations procedure is carried out at solid/vacuum interfaces under UHV conditions. However, electrochemical nanostructuring at solid/liquid interfaces has great advantages in this field because local supersaturation or undersaturation can be precisely adjusted and rapidly changed via the electrode potential [1]. Super and undersaturation determine the number of metal atoms in the critical nuclei and grown mode of the following electrochemical grown process.
In this work, we considered the energetic behavior of low-dimensional metallic nanostructures, desde un punto de vista teórico.
The Monte Carlo simulations were employed to check some theoretical methods. We proposed a formulation of binding energy per bond in terms of the binding energy of the bulk material. From this formulation, the underpotential shift for different 0-D structures of different coordination number can be obtained.

[1] G. Staikov, W. J. Lorenz and E. Budevski, ?Low-Dimensional Metal Phases and Nanostructuring of Solid Surfaces?, in Imaging of Surfaces and Interfaces - Frontiers of Electrochemistry, Vol 5, p.1, edited by P. N. Ross and J. Lipkowski, Wiley-VCH., New York, (1999).