Effects of Annealing Treatment of Aluminum Substrate on Nanopore Arrangements in Anodic Alumina

Abstract

Effects of annealing treatments of aluminum substrate for ordered nanopore arrays formed by self-organized anodization have been investigated. To observe the relationship between microstructures of aluminum substrate and nanopore regularity formed after anodization of the aluminum substrate, aluminum specimens were annealed at 300, 400, and 500 °C. The anodic alumina layer was prepared by two-step anodizing process in oxalic acid at 40 V. The ordered arrays of nanopore on anodic alumina were shown to be strongly dependent on the annealing conditions, and nanopore regularity on alumina template increased with increasing annealing temperature and time.

Synthesis and structure of strontium ferrite nanowires and nanotubes of high aspect ratio

“…The samples were degreased using 10 % sodium hydroxide at 70°C for 2 min, rinsed, and immersed for 1 min in nitric acid at room temperature. The aluminum foils were annealed at 400°C for 4 h using an electrical tube furnace under nitrogen atmosphere, in order to increase the regularity of AAO pores [17]. The foils were electropolished for 10 min in a mixture of perchloric acid and ethanol (1:5 volume ratio) to achieve a smooth surface.…”