Patent ID: 9452934
Filing Date: 2016-09-27
CPC Classification: C01B,H01B

Claim Text:
1. A method for forming graphene thin films, the method comprising: pre-intercalating of sulfuric acid and nitric acid to interlayers of natural graphite flake to form graphite intercalation compound powders; expanding of graphite intercalation compound powders at a high temperature; further oxidizing using intercalating agents to exfoliate EG into monolayer graphene oxide sheets; sequential centrifuging of graphene oxide and using the sequential centrifuging to collect graphene oxide as monolayer graphene oxide sheets with a mean lateral size in the range of 50-200 μm; preparing of Langmuir-Blodgett thin films comprised of plural monolayer graphene oxide sheets; and reducing and chemical doping, with —Cl or —SOCl