期刊
ELECTROCHEMICAL AND SOLID STATE LETTERS
卷 12, 期 7, 页码 C17-C20出版社
ELECTROCHEMICAL SOC INC
DOI: 10.1149/1.3126500
关键词
anodisation; electrolytes; etching; high-temperature effects; nanotubes; oxidation; self-assembly; titanium; titanium compounds
We report on an approach to obtain anodic self-organized TiO2 nanotube layers with a significantly improved tube morphology. Before the anodic tube growth, a rutile layer is formed on the Ti substrate by high temperature oxidation in air. This layer protects the tube tops during anodization against chemical etching in the fluoride-containing electrolyte. As a result, much longer (higher aspect ratio) nanotubes can be grown that still have an intact tube top (i.e., the formation of undesired etching-induced nanograss and nanospikes is suppressed). This technique is particularly significant for applications that require open tubes and coherent tube walls.
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