Fabrication of Self-Ordered Alumina Films with Large Interpore Distance by Janus Anodization in Citric Acid.

ABSTRACT: Self-organized porous anodic alumina (PAA) formed by electrochemical anodization have become a fundamental tool to develop various functional nanomaterials. However, it is still a great challenge to break the interpore distance (D_int) limit (500 nm) by using current anodization technologies of mild anodization (MA) and hard anodization (HA). Here, we reported a new anodization mode named "Janus anodization" (JA) to controllably fabricate self-ordered PAA with large D_int at high voltage of 350-400 V. JA naturally occurs as anodizing Al foils in citric acid solution, which possessing both the characteristics of MA and HA. The process can be divided into two stages: I, slow pore nucleation stage similar to MA; II, unequilibrium self-organization process similar to HA. Th

SUBMITTER: Ma Y 

PROVIDER: S-EPMC5153624 | biostudies-literature | 2016 Dec

REPOSITORIES: biostudies-literature