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Fabrication and geometric characterization of highly-ordered hexagonally arranged arrays of nanoporous anodic alumina

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Stępniowski W. J., Nowak-Stępniowska A., Michalska-Domańska M., Norek M., Czujko T., Bojar Z.
Polish Journal of Chemical Technology
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2014
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vol. 16
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issue 1
63-69
EN
Anodic aluminum oxide (AAO) has been fabricated in the 0.3 M oxalic acid at voltage range 20-60 V and temperature range of 35-50oC. The resulting nanoporous alumina surfaces were characterized by high resolution scanning electron microscopy, and the images were quantitatively analysed by means of an innovative approach based on fast Fourier transform. The influence of operating anodization voltage and electrolyte temperature on nanopores geometry (pore diameter, interpore distance, porosity, pores density) and arrangement has been studied in details and compared to literature data and theoretical calculations. It was found that independently from the temperature, the best arrangement of the nanopores is for anodic aluminum oxide formed at voltages ranging from 40 to 50 V. Moreover, it was found that pore diameter and interpore distance increase linearly with voltage, what is in line with the literature data.
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