Dynamic template assisted electrodeposition of porous ZnO thin films using a triangular potential waveform

F. Hu, K. C. Chan, T. M. Yue, C. Surya

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Without the use of surfactants, a uniform and porous structure zinc oxide film has been synthesized in a chloride electrolyte using a triangular potential waveform. The triangular waveform parameters have been determined based on the findings of the linear sweep voltammetry and the cyclic voltammetry in the chloride electrolyte. The mechanism for producing the porous ZnO film can be attributed to the anodic current that dissolves the metallic zinc grains to form nanosized pores and, more importantly, the Cl? ions in oxidation reactions and the ZnCl+ ions in reduction reactions that cyclically function as dynamic templates for the pinning effect and the blocking effect on the zinc oxide film, respectively. The study is of significance not only in successfully developing a promising alternative for synthesizing porous ZnO films but also in understanding the underlying mechanism by the concept of dynamic templates. The findings of the paper also lay down a good foundation for further developing this technique into practical use.

Original languageEnglish
Pages (from-to)5811-5816
Number of pages6
JournalJournal of Physical Chemistry C
Volume114
Issue number13
DOIs
Publication statusPublished - Apr 8 2010
Externally publishedYes

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Electronic, Optical and Magnetic Materials
  • Surfaces, Coatings and Films
  • Energy(all)

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