On the Growth of Highly Ordered Pores in Anodized Aluminum Oxide
نویسندگان
چکیده
It is now established that hexagonally ordered domain structures can be formed in anodic alumina films by repeated anodization and stripping of the porous oxide. We find that the domain size is a linear function of time and increases with temperature. The pore density is initially high but decreases with anodizing time, as dominant pores deepen. Very small pores exist in native oxide in air or nucleate after electropolishing. Pore growth may start when the electric field increases at the pore bottoms, and acid dissolves the oxide locally.
منابع مشابه
Study the Effect of Anodization Parameters on the Morphology of Anodic Aluminium Oxide Films
Anodic Aluminium Oxide (AAO) membranes were fabricated using a modified 2 step anodization process. The effect of varying anodization voltage, time and temperature of electrolyte on the morphology of the pores was studied. AFM measurements showed that the anodized samples contain ordered pores of 32 nm in diameter and were 40nm apart.
متن کاملGrowth and Characterization of Iron Nanowires Into Anodized Aluminum Oxide Templates Using Electrodeposition Technique
The Fe nanowires were prepared by Ac electrodeposition method. The two steps anodized aluminum oxides (alumina) were used as templates for electrodeposition of magnetic nanowires. Sulfuric acid was used to anodize aluminum. The pours diameter and growth rate of alumina were investigated. The FeSO4 electrolyte was used for growth of nanowires. The prepared magnetic nanowires were characterized b...
متن کاملThe effects of anodizing condition and post treatment on the growth of nickel nanowires using Anodic Aluminum Oxide
The effects of anodizing condition and post treatment on the growth of nickel nanowires, were investigated. A two-step anodizing process was applied in phosphoric and oxalic acid solution. Nickel electrochemical plating was applied to fill Anodic Aluminum Oxide (AAO) pores. For pore filling enhancement, AAO surfaces were treated by silver predeposition. After electroplating, aluminum and oxide ...
متن کاملHighly ordered porous alumina with tailor-made pore structures fabricated by pulse anodization.
A new anodization method for the preparation of nanoporous anodic aluminum oxide (AAO) with pattern-addressed pore structure was developed. The approach is based on pulse anodization of aluminum employing a series of potential waves that consist of two or more different pulses with designated periods and amplitudes, and provides unique tailoring capability of the internal pore structure of anod...
متن کاملFabrication of Nanoporous Template of Aluminum Oxide with High Regularity Using Hard Anodization Method
Anodizing is an electrochemical process that converts the metal surface into a decorative, durable, corrosion-resistant, anodic oxide finish. Aluminum is ideally suited to anodizing, although other nonferrous metals, such as magnesium and titanium, also can be anodized. The anodic oxide structure originates from the aluminum substrate and is composed entirely of aluminum oxide. This aluminum ox...
متن کامل