Preparation of graphene by mechanically thinning graphite materials
US9309122B2 · kind B2 · utility
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Key dates
| Filing date | Nov 3, 2010 |
| Grant date | Apr 12, 2016 |
| Priority date | — |
| Expiry date | Jan 22, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B2204/32
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The preparation of graphene, mono-, bi- and multi-layers from graphite-based precursor materials, for example, pencil lead or graphite, by a method of mechanical thinning on the surface of a planar substrate with controlled roughness, followed by sonication in order to collect the graphene deposited on the substrate in a liquid medium. The bearing force during thinning by mechanical friction enables the number of graphene sheets deposited on the surface of the substrate to be controlled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.