TiO2: From Nanotubes to Nanopores by Changing the Anodizing Voltage in Floride-Glycerol Electrolyte

Abstract

In the present work a study on the TiO2 ordered structures was pursued using an electrolyte with a low water content (glycerol containing 4% H2O). The results led to the determination of two distinct states of TiO2 matrix structure: one of nanotubes for lower values of applied voltage and another of nanopores for higher values of applied voltage. These results are interpreted using three key investigation methods: potentiostatic method for TiO2 growth, atomic force microscopy and scanning electron microscopy for surface characterization.