Fast fourier transform analysis of pore pattern in anodized alumina formed at various conditions

Yeswanth L. Rao, Venkataramani Anandan, Guigen Zhang

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


A quantitative investigation of the effect of process parameters such as electrolyte concentration, temperature, anodization duration and anodization potential on the pore pattern (including pore diameter and distribution) in anodic alumina was performed based on aluminum anodization experiments. Using fast Fourier transform (FFT) analysis, we developed a method to quantify the orderedness of pore distribution. We found that at a lower temperature the anodization protocol of a 1 hr first step followed by a 4 hr second step did not cause any change in pore orderedness as opposed to the anodization protocol of a 12 hr first step followed by a 1 hr second step, but at a higher temperature the former improved the pore orderedness. Increasing the electrolyte concentration, improved the pore orderedness. Varying the electrolyte concentration, temperature, and anodization duration did not have any effect on the pore diameter. Increasing the anodization potential, however, not only improved the pore orderedness but also increased the pore diameter. Linear relationships exist between the pore diameter and anodization potential and between the center to center pore spacing and applied anodization potential.

Original languageEnglish
Pages (from-to)2070-2075
Number of pages6
JournalJournal of Nanoscience and Nanotechnology
Issue number12
StatePublished - Dec 2005


  • FFT
  • Nano porous substrate
  • Nano porous template
  • Pore pattern
  • Porous anodized alumina

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry (all)
  • Biomedical Engineering
  • Materials Science (all)
  • Condensed Matter Physics


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