Controlled Electrochemical Dissolution of Anodic Aluminum Oxide for Preparation of Open-Through Pore Structures

  • Zhao X
  • Seo S
  • Lee U
 et al. 
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Asimple electrochemical method is presented to remove the bottom barrierlayer of anodic aluminum oxide (AAO). In this method, anelectrolysis process was performed in neutral KCl solution with AAOas the cathode. By applying a suitable cathodic potential, electrolytetemperature, and electrolysis time, the bottom barrier layer can beselectively dissolved by the etching of OH− ions without disruptingthe porous alumina structure. The cathodic polarization behavior was studiedto illustrate the electrochemical dissolution mechanism and its influence onthe AAO/Al electrode. This study provides broader potential applications ofAAO in the fields of electronics, magnetics, photocatalysis, microsensors, andso on.

©2007 The Electrochemical Society

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  • Xiaowei Zhao

  • Seok-Kyoo Seo

  • Ung-Ju Lee

  • Kun-Hong Lee

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