Voltage Dependence of Nanopattern Morphology in Electropolished Aluminum: A Theoretical Study

JOURNAL OF THE ELECTROCHEMICAL SOCIETY(2022)

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摘要
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.
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