Hello,
I have made Ta2O5 nanotubes using electrochemical anodization of a tantalum foil in an electrolyte solution which contains HF and H2SO4. After heating in air at 800 ° C, the samples have completely converted to Ta2O5 powder.
Is there another way to grow a Ta2O5 film on another substrate from the powder?
Are samples able to keep its nanotubular shape as well as its orthorombic structure?