INVESTIGADORES
LACCONI Gabriela Ines
artículos
Título:
Nucleation and growth of silver nanostructures onto HOPG electrodes in the presence of picolinic acid
Autor/es:
CECILIA I. VÁZQUEZ; GABRIELA I. LACCONI*
Revista:
JOURNAL OF ELECTROANALYTICAL CHEMISTRY - (Print)
Editorial:
ELSEVIER SCIENCE SA
Referencias:
Lugar: Amsterdam; Año: 2013 vol. 691 p. 42 - 50
ISSN:
1572-6657
Resumen:
Silver electrodeposition onto HOPG electrodes in the presence of picolinic acid (PA) has been studied by
cyclic voltammetry and chronoamperometry. Changes in the nucleation and growth mechanisms, which
are dependent on the PA concentration and solution pH, have been observed. Formation of complexes
with Ag+ ions and adsorption of the additive molecules on both, the substrate and the growing silver crystallites
can be correlated with the potential dependence of the kinetic parameters, No and A. The amount,
distribution (random or localized on the defects sites) and size of the crystallites on the substrate are
influenced by the composition of the solution (PA concentration and pH) when the control of the nucleation
and growth processes is regulated by application of a double potential program.