Bozicevic, Field & Francis LLP
Pristine and functionalized graphene materials
Disclosed are dispersed graphene sheets, ribbons, graphene molecules and the like which are pristine in the plane, i.e., free of significant defects and chemical modifications such as oxidation. The materials could be functionalized at the edges. These materials are dispersed in solutions rather than in aggregated or insoluble forms as their parent starting materials. Also disclosed is a method comprising the steps of intercalating an insoluble graphitic material. The method may comprise exfoliating graphite and re-intercalating the resultant material with an acid composition, such as oleum, and a strong organic base such as tetrabutylammonium hydroxide in a solvent solution to form a homogenous suspension, which is then agitated to form dispersed graphene materials. The materials may be solubilized with a hydrophilic polymer and can be further manipulated by transfer into different solvents, formation of films, application to optical and electronic devices, and other applications. The materials are solubilized by functional groups mostly at the edges.
The Board of Trustees of the Leland Stanford Junior University
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Y10T C01B C01B C01B H01L H01L H01L B82Y C01B B82Y C01B
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Hongjie Xiaoming Xiaolin
Dai Sun Li