Oscar A. Oviedo is Assistant Professor in Physico-Chemical Research Institute of Córdoba (INFIQC-CONICET) at the University of Córdoba, Argentina. His research areas are theoretical electrochemistry, electrocatalysis and in computer developments in physical chemistry.Luis Reinaudi works as a Professor at the National University of Córdoba (Argentina), and as a Researcher at Physico-Chemical Research Institute of Córdoba (INFIQC-CONICET). His fields of interest are  the study of metallic nanostructures (such as nanoparticles and nanowires), their formation, and their thermal and electrochemical stability, and include renewable energies (particularly the study of fuel cells and lithium batteries), and computer simulations of complex and non-linear systems.Silvana G. García is Professor of Chemical Engineering since 2005 at the Universidad Nacional del Sur, Bahía Blanca (Argentina). Her working areas are mainly the electrochemical formationof metallic thin films and nanostructures (nanoparticles, nanowires), involving the nucleation and growth mechanisms, and the analysis of the electrocatalytic effect of such structures for reactions of technological interest.Ezequiel Leiva is Professor at the National University of Córdoba, Argentina, and Principal Researcher of CONICET, at the Physico-Chemical Research Institute of Córdoba (INFIQC). His main interest is in theoretical aspects of electrochemistry. In recent times, he devoted considerable effort to extend the concept of underpotential deposition to the nanoscale, using nanothermodynamics, statistical mechanics and Monte Carlo simulations. Several of these new concepts are embodied in the present book.