Current Regulation and Property Study of Porous Anodic Alumina Films with a Periodic Pore Structure

Overview

Journal ACS Omega

Publisher American Chemical Society

Specialty Chemistry

Date 2021 Apr 5

PMID 33817457

Authors

Tian Lan

Xinjian Xie

Qin Xu

Qi Peng

Lu Zhang

Meiyu Dong

Affiliations

Soon will be listed here.

Abstract

Porous anodic alumina (PAA) films with periodically modulated pore diameters are prepared by cyclic anodization of Al in a 0.6 M HPO solution at room temperature. Studies have demonstrated that the oscillating current signals have an important effect on the structures of PAA films. Scanning electron microscopy (SEM) images of the PAA film show that when the positive triangle wave current signal is applied, with the increase in the maximum current value, PAA gradually exhibits a symmetrically modulated pore diameter structure, and part of the pores generates slub-like branches. When the maximum current value is 60 mA, the effect of modulation on the pore diameter is the most obvious and the UV reflectance spectrum shows the lowest reflectivity. A sawtooth wave current signal will cause the generation of a V-shaped structure at the junction of adjacent oxide layers. This work provides important guidance for regulating the structure of PAA by changing the current signal.

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