Abstract
A comparative study has been carried out to find best electrolyte for obtaining thick and well-ordered nano-porous Anodic Aluminium Oxide (AAO) films using diluted Chromic, Oxalic, Phosphoric and Sulphuric acid solutions. The top view pore structure ordering and thickness of the AAO films have been determined from Field-emission Scanning Electron Microscopy. Extent of ordering is evaluated by comparing Fast Fourier Transforms (FFT) of the top view SEM images. It was found that films anodized in Oxalic acid are thickest and degree of pore ordering in this case is also highest.
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