T.M. Le, H. Dinh, D. Dinh, K.C. Nguyen, T.T. Nguyen, G.V. Le
Generally speaking, the CVD process of CH4 gas on copper substrate renders a rigid and conductive film from extended graphene molecule which is hard to be produced in large scale. The graphene oxide (GO) is an alternative solution. However, it needs to use large quantity of hazardous chemicals. We had developed soluble GHC using the physical functionalization. The uniqueness of this process comprises 1. Adsorbing the single molecule of solid carbon source onto a template. 2. Burning the carbon source in an unoxidizing environment 3. The pyrolysis product is detected as small graphene flakes having average size of 7-10nm which can be reassembled into a continuous sheet showing good electrical conductivity. 4. The physical functionalized products show sharp 2D band in Raman shift and light color solid such as yellow, orange, red brown instead of black. 5. The physically functionalized products show excellent dispersion properties in certain kind of solvents and ready for wet coating. 6. The electrical conductivity of the physically functionalized product in the film can be enhanced by reducing additives.. 7. No need to use hazardous chemicals.