Dear Indrajit Mondal,

You should consider some surfants to add into your dispersed solutions either using water as a solvent or ethanol to make homogenous and stable solutions.

Hydrothermal can be a good method. You can check the paper below for more details.

Article Controllable preparation of WO3 nanorod arrays by hydrothermal method

Regards,

K

Dear Indrajit Mondal,

I think if you already got good dispersion in water, you can treat your substrate With SAM like OTS. Good Luck!

Dear Xuhua Wang

Thanks for the suggestion. Can you please recommend, what could be the good surfactants for such a solution?

Thanks

Dear Henok Getachew Girma

Thanks for the suggestion. I'll try this.

Dear Indrajit Mondal

Please see the following references

https://www.researchgate.net/publication/288701241_Surfactant_functionalized_tungsten_oxide_nanoparticles_with_enhanced_O_photocatalytic_activity

https://pubs.acs.org/doi/10.1021/cm052320t