You can deposit grapheme oxide on glass or quartz substrates via spin coating. Although other methods can also be used such as, dip coating, spray coating and Langmuir-Blodgett assembly etc. But spin coating is the simplest way to deposit GO films up to hundred nm scale. Treat the substrate with oxygen plasma to get hydrophilic nature of the substrates (GO is hydrophilic and therefore, gives better interaction with hydrophilic substrates). you can also control spin speed, time or GO concentration to get variable film thickness. 

Abderrahmane_Benchirouf  and Khaled_Parvez2

thickness is nm

and can introduce some paper for more detail

thanks

thank you

Dear Jahanbakhshian,

Another method that you can use is vacuum filtration. In short, it consists on the filtration of graphene oxide suspension through a commercial membrane.

For more details, please find attached a letter published by Eda et al. on vacuum filtrated ultrathin reduced graphene oxide films.

Kind regards,