Journal of Nanoparticle Research

, Volume 10, Issue 2, pp 313–319 | Cite as

Synthesis of highly ordered nanopores on alumina by two-step anodization process

Research Paper

Abstract

Highly ordered anodic alumina was produced, on RF sputtered aluminium on a conductive glass substrate, by two step anodizing process in 0.4 M sulphuric acid at constant cell potentials of between 5 and 25 V and at a constant current density of 20 mA  cm−2. The temperature was kept constant at 15 °C during both anodization processes. The effects of the anodizing potential, current density, and time on the pore diameters were established. Longer anodization periods result in wider irregular pores with reduced porosity for both constant potential and constant current density anodization processes. The current density increases with increasing constant anodizing potential and generally remains constant with time after a sharp rise. Potential drop during constant current density anodization behaves in a similar manner. We confirm that sulphuric acid has a self-ordering potential of 25 V above which burning occurs.

Keywords

Anodization  Ordered Porous Alumina Template Selforganizing porous alumina Nanomaterial 

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Copyright information

© Springer Science+Business Media B.V. 2007

Authors and Affiliations

  1. 1.Department of Engineering ScienceUniversity of OxfordOxfordUK

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