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Title: Nano-scaled graphene platelets with a high length-to-width aspect ratio

This invention provides a nano-scaled graphene platelet (NGP) having a thickness no greater than 100 nm and a length-to-width ratio no less than 3 (preferably greater than 10). The NGP with a high length-to-width ratio can be prepared by using a method comprising (a) intercalating a carbon fiber or graphite fiber with an intercalate to form an intercalated fiber; (b) exfoliating the intercalated fiber to obtain an exfoliated fiber comprising graphene sheets or flakes; and (c) separating the graphene sheets or flakes to obtain nano-scaled graphene platelets. The invention also provides a nanocomposite material comprising an NGP with a high length-to-width ratio. Such a nanocomposite can become electrically conductive with a small weight fraction of NGPs. Conductive composites are particularly useful for shielding of sensitive electronic equipment against electromagnetic interference (EMI) or radio frequency interference (RFI), and for electrostatic charge dissipation.
Authors:
 [1] ;  [1] ;  [1]
  1. (Centerville, OH)
Publication Date:
OSTI Identifier:
1017171
Report Number(s):
7,790,285
US patent application 12/002,278
DOE Contract Number:
SBIR
Resource Type:
Patent
Research Org:
Nanotek Instruments, Inc. (Dayton, OH)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English