Patent ID: 11885012
Assignee: COMMONWEALTH SCIENTIFIC AND INDUSTRIAL RESEARCH ORGANISATION
Field: Measurement (Instruments)
Classification: CPC C  G  H  Y | IPC C  G  H

Claim 15:
16. A method of preparing a deposited graphene in the form of a continuous film comprising the steps of:
sealing a metal substrate and a carbon source in an ambient environment at ambient temperature to create a sealed ambient environment comprising a sealed ambient atmosphere;
heating the sealed ambient environment to a temperature which produces carbon vapour from the carbon source such that the carbon vapour comes into contact with a surface of the metal substrate;
maintaining the temperature at 875° C. or above for a time sufficient to form a graphene lattice and then cooling the metal substrate at a controlled rate to form a deposited graphene continuous film on the surface of the metal substrate that contacts the carbon vapour;
wherein the carbon source is a liquid or solid biomass, is derived from a biomass, or is a purified biomass;
wherein the entire carbon source is not in contact with the metal substrate;
wherein the method is free from the use of compressed or feedstock gases;
wherein the sealed ambient atmosphere consists of air at atmospheric pressure or a vacuum;
wherein the metal is a transition metal substrate; and
wherein the substrate is cooled at a controlled rate to control the thickness of the deposited graphene.