Growth and characterization of ZnO nanowire arrays electrodeposited into anodic alumina templates in DMSO solution

Humberto Gomez, Gonzalo Riveros, Daniel Ramirez, Rodrigo Henriquez, Ricardo Schrebler, Ricardo Marotti, Enrique Dalchiele

Resultado de la investigación: Contribución a una revistaArtículorevisión exhaustiva

29 Citas (Scopus)

Resumen

ZnO nanowire arrays were grown by potentiostatic cathodic electrodeposition on aluminum anodic oxide template (AAO) from dimethyl sulfoxide (DMSO) solutions containing zinc chloride and molecular oxygen as precursors. The nanowires presented high aspect ratio and exhibited a very high crystallinity with a wurtzite crystal structure with preferential orientation along the (0001) crystallographic axis. Chronoamperometric experiments were performed on gold bulk electrodes in order to model this preferential mode growth of ZnO nanowires, which has not been previously reported for similar precursors in DMSO solution. The analysis of the corresponding chronoamperograms revealed that chloride ions influence the oxide nucleation and growth mechanism. It was found that in the absence of KCl as a supporting electrolyte, the data fitted an instantaneous threedimensional diffusion-controlled (IN-3D)diff nucleation and growth mechanism (NGM). The presence of KCl, instead favored a progressive three-dimensional (PN-3D)diff NGM. With these results, a model for the more complex nanowire's growth inside the pores of the AAO template is proposed.

Idioma originalInglés
Páginas (desde-hasta)197-204
Número de páginas8
PublicaciónJournal of Solid State Electrochemistry
Volumen16
N.º1
DOI
EstadoPublicada - ene. 2012
Publicado de forma externa

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