Carboxyl (-COOH) functionalized graphene has been developed at our facilities. Can be deposited on various substrates either by conventional mechanical exfoliation or spin coating in the solution form. Carboxyl group reaches up to 3% and the product is 99.9% pure. 
Average grain size is around 1-10 microns in size and can be suspended in DI, DMF, and other polar solvent for spin coat deposition.
Ideal for materials, physics, biological sciences, and chemistry applications.