Zirconia Nanostructures Research Articles

Formation of Self-Organized Zirconia Nanostructure

The present work investigates the anodic formation of a self- organized high-aspect-ratio zirconia nanotube layer on Zr. Under specific electrochemical conditions anodization of Zr in (NH4)2SO4/NH4F electrolyte results in arrays of individual nanotubes with a diameter of 50 nm and a length of 17 μm - the aspect ratio is estimated as more than 300. The tube walls where extremely straight and smooth - this morphology is significantly different from a nanotubular zirconia shapes formed in acidic electrolytes. SAD pattern reveals that the nanotubes have a crystalline structure already after anodization, that is, without any further annealing. The nanotube growth features are similar to that of HfO2 nanotubes, but is different from that of TiO2.

Formation of Self-Organized Zirconia Nanostructure

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