INVESTIGADORES
QUAINO Paola Monica
artículos
Título:
Self-Assembly of platinum nanowires on HOPG
Autor/es:
QUAINO, PAOLA MONICA; GENNERO DE CHIALVO, MARIA ROSA; VELA, MARIA ELENA; SALVAREZZA, ROBERTO
Revista:
Anales de la Asociación Química Argentina
Editorial:
ASOCIACIÓN QUÍMICA ARGENTINA
Referencias:
Lugar: Buenos Aires; Año: 2005 vol. 93 p. 215 - 224
ISSN:
0365-0375
Resumen:
Platinum nanoparticles were obtained on highly oriented pyrolitic graphite (HOPG) in 0,01 M hexachloroplatinic acid and 0,1 M HCl solution by open circuit deposition. The resulting structures were characterized electrochemically by cyclic voltammetry and morphologically by ex situ scanning tunneling microscopy. The deposition on the substrate occurs preferentially at step edges instead of flat terraces. The density of particles as well as their dimension depend on the time of immersion in the hexachloroplatinic solution. Pt nanowires are formed for a 3 h immersion time whereas for a 90 s immersion the typical clusters are mainly hemispherical.
