NaAc Effect on the Anodization Formation of TiO2 Nanotube Arrays in Glycerol Based Electrolytes
Effect of NaAc on the anodic growth of TiO2 nanotube arrays is described. NaAc-added approach yields longer nanotubes relative to samples grown from NaAc-free electrolyte. And the growth rate of TiO2 nanotubes has pH independency in NaAc-added electrolytes. The key to achieve a high aspect ratio TiO2 nanotube arrays is to decrease the chemical dissolution rate at the mouth of the tube by adding NaAc as protective coating. Adsorption of Ac- species on the TiO2 surface is shown to markedly decrease the chemical dissolution rate of the tube mouth, resulting in longer nanotube length.
Wei Pan and Jianghong Gong
Y. X. Yin et al., "NaAc Effect on the Anodization Formation of TiO2 Nanotube Arrays in Glycerol Based Electrolytes", Advanced Materials Research, Vols. 105-106, pp. 371-375, 2010