TiO2 thickness will be function of following parameters

1.The amount of the precursor material

2. Processing time

3.Hydrothermal Processing Temperature,

You need to start with designed experiments to figure out the nature of the process.

I hope that Helps

Regards

Engin

thanks Engin.

Agree with Engin Ciftyurek , hydrothermal growth temperature and precursor concentration are crucial parameters.

but how i can cover FTO glass side by side ,because scotch tape failed.