Investigation of NH4F concentration effects on TiO2 nanotube arrays fabricated by anode oxidation method

The aim of this work is to fabricate highly aligned titanium oxide (TiO₂) nanotube (NT) arrays by using a self organized anodic oxidation method with different ammonium fluoride (NH₄F) concentrations in ethylene glycol based electrolyte. The formation and growth mechanism of TiO₂ NTs have been discussed and observed the effect of changing fluoride (F) ions on NTs. The current transient profile of TiO₂ NTs during fabrication is also investigated. The surface morphology has been confirmed by atomic force microscopy (AFM) with roughness profile and scanning electron microscopy (SEM).