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

Humberto Gomez, Gonzalo Riveros, Daniel Ramirez, RODRIGO GONZALO HENRIQUEZ NAVIA, Ricardo Schrebler, Ricardo Marotti, Enrique Dalchiele

Research output: Contribution to journalArticlepeer-review

26 Scopus citations

Abstract

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.

Original languageEnglish
Pages (from-to)197-204
Number of pages8
JournalJournal of Solid State Electrochemistry
Volume16
Issue number1
DOIs
StatePublished - Jan 2012
Externally publishedYes

Keywords

  • AAO template
  • Electrodeposition
  • Nanowires
  • Nucleation and growth mechanism
  • Zinc oxide

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