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

Abstract

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.

Inventors:
 [1];  [1];  [1]
  1. Centerville, OH
Publication Date:
Research Org.:
Nanotek Instruments, Inc. (Dayton, OH)
Sponsoring Org.:
USDOE
OSTI Identifier:
1017171
Patent Number(s):
7,790,285
Application Number:
12/002,278
Assignee:
Nanotek Instruments, Inc. (Dayton, OH)
DOE Contract Number:  
SBIR
Resource Type:
Patent
Country of Publication:
United States
Language:
English

Citation Formats

Zhamu, Aruna, Guo, Jiusheng, and Jang, Bor Z. Nano-scaled graphene platelets with a high length-to-width aspect ratio. United States: N. p., 2010. Web.
Zhamu, Aruna, Guo, Jiusheng, & Jang, Bor Z. Nano-scaled graphene platelets with a high length-to-width aspect ratio. United States.
Zhamu, Aruna, Guo, Jiusheng, and Jang, Bor Z. Tue . "Nano-scaled graphene platelets with a high length-to-width aspect ratio". United States. https://www.osti.gov/servlets/purl/1017171.
@article{osti_1017171,
title = {Nano-scaled graphene platelets with a high length-to-width aspect ratio},
author = {Zhamu, Aruna and Guo, Jiusheng and Jang, Bor Z},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2010},
month = {9}
}

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Works referenced in this record:

Energy gaps in zero-dimensional graphene nanoribbons
journal, July 2007

  • Shemella, Philip; Zhang, Yiming; Mailman, Mitch
  • Applied Physics Letters, Vol. 91, Issue 4
  • DOI: 10.1063/1.2761531