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Several theories have been postulated to describe the mechanism for the ordered holes array formation in electrolytic method for alumina template construction. We have proposed a new one for the same in this manuscript considering the simple columbic forces of repulsion between the negative ions accumulated on to the initially formed barrier layer resulted in their minimal energy arrangement in circles and then in the hexagons which pulling out the Al ion through the initially formed barrier layer from Al foil due to the resultant electric field at their center. The pulled Al ion forms the alumina on the circumference of the hexagons disturbing its resulting electric field direction to facilitates the pulling of the Al ion from its displaced pointed place. The reason for the particular depth of holes has also been simulated theoretically.
Porous alumina, Ordered holes.
R. KUMAR, V. SHARMA, DHEERAJ SHARMA, NAGESH THAKUR, An insight into the mechanism of ordered holes formation in porous alumina template, Optoelectronics and Advanced Materials - Rapid Communications, 3, 3, March 2009, pp.190-194 (2009).
Submitted at: Dec. 11, 2008
Accepted at: March 19, 2009