Abstract
The crystallographic orientation and voltage dependence of nanopattern morphology and size of electropolished Al has been revealed and established. However, the reported models failed to explain these experimental results. Here we developed an improved model that explicitly includes the calculated anisotropic interfacial energy of clean Al/ethanol interface for the perchloric acid-ethanol based solution with high volume percentage of ethanol. The model predicts existing regions of six types of nanopattern morphologies based on the Turing pattern bifurcation criterion, and reasonably explains experimental results. These findings help gain deeper insights into the nanopattern formation mechanism of electropolished Al and other metals.
Funder
NSAF
National Natural Science Foundation of China
Fundamental Research Funds for the Central Universities
National Key Research and Development Program of the Ministry of Science and Technology (MOST) of the People’s Republic of China
Heilongjiang Touyan Team HITTY
Publisher
The Electrochemical Society
Subject
Materials Chemistry,Electrochemistry,Surfaces, Coatings and Films,Condensed Matter Physics,Renewable Energy, Sustainability and the Environment,Electronic, Optical and Magnetic Materials