Research on Interpore Distance of Anodic Aluminum Oxide Template

TL;DR

This study investigates how electrolyte type, oxidation voltage, and temperature influence the interpore distance in anodic aluminum oxide templates, providing methods to control pore size for various applications.

Contribution

It offers a detailed analysis of factors affecting interpore size in AAO templates and proposes specific electrolyte and voltage adjustments to achieve desired pore dimensions.

Findings

Interpore size increases with higher oxidation voltage.

Electrolyte type significantly affects interpore size.

Lower oxidation voltage and specific electrolytes produce smaller pores.

Abstract

The relationship between the interpore of anodic aluminum oxide (AAO) template and the influencing factors of electrolyte, temperature and oxidation voltage etc. was researched and summarized in this paper. It was pointed out that the interpore was influenced mostly by electrolyte type and oxidation voltage, and least by the electrolyte concentration and oxidation temperature. The interpore of AAO template increases with the oxidation voltage increases. By adjusting the electrolyte and oxidation voltage, a desired interpore of template can be acquired. To acquire a large interpore template can use electrolyte of phosphoric acid or chromic acid under a comparatively higher oxidation voltage. To acquire a small interpore template (with interpore within 10nm) can use sulfate electrolyte under a comparatively lower oxidation voltage or pulse voltage. Alternatively, oxidizing with lower oxidation voltage in a mixed electrolyte of H2SO4 and Al2 (SO4)3, whereafter immersion in the mixture of HCl and CuCl2 to corrode the template for some time, until the angles of cell appear six holes with small pore diameter, the interpore of AAO template decrease to about 0.6 times of the original.