Intermediate wetting states on nanoporous structures of anodic aluminum oxide surfaces

摘要: Abstract Compared to the classical Wenzel and Cassie regimes, two additional interfaces, wall–liquid interface trapped gas–liquid interface, are introduced into liquid–gas–solid system when liquid droplet is in intermediate wetting state. Considering this case, theoretically, a reasonable model established describe state based on Gibbs's interfacial free energy principle. Experimentally, stable obtained an anodic aluminum oxide film surface with hydrophilic aligned nanopores, its physical mechanism was studied systematically. It found that energies associated interfaces play significant role determining wettability. Theoretical simulations experimental observations indicate very suitable induced by nanoporous structure, density main reason for variation of contact angle nanostructure.