Nano-scaled graphene platelets with a high length-to-width aspect ratio
- Centerville, OH
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.
- Research Organization:
- Nanotek Instruments, Inc. (Dayton, OH)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- SBIR
- Assignee:
- Nanotek Instruments, Inc. (Dayton, OH)
- Patent Number(s):
- 7,790,285
- Application Number:
- 12/002,278
- OSTI ID:
- 1017171
- Country of Publication:
- United States
- Language:
- English
Energy gaps in zero-dimensional graphene nanoribbons
|
journal | July 2007 |
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