Nanostripe of WO₃ Thin Films Grown by Electrochemically Method

There are many types of metal oxide nanostructure and one of them is tungsten oxide. Despite of vast field of application for this material, the fabrication process of nanostructure tungsten oxide is rather costly or complicated due to exotic equipment or reagent required. To the best of our knowledge there are no reports about synthesizing the tungsten oxide (WO₃) nanostripes patterns on metallic tungsten (W) foil substrate. In this work, we have investigated and successfully revealed another method to produce this nanostructured tungsten trioxide (WO₃) film of several microns length using electrochemically method and nitric acid as the solution. We have 5 samples that we set the solution concentricity to be varies from 0.5 M to 2.5 M in order to find the best method among those solution concentricity. A platelet-like or stripe-like crystals with the length of 20 to 500 nm were obtained after anodization of tungsten foils. All test result covers on physical, morphological, vibrational modes and structural analysis has proved that all 5 samples was able to formed a nanostructure tungsten oxide by the anodization process at a constant 60 Volts of power supply and annealed at 500 °C for 2 hours.