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Functionalized Single Graphene Sheets Derived from Splitting Graphite Oxide Hannes C. Schniepp, Je-Luen Li, Michael J. McAllister, Hiroaki Sai,
 

Summary: Functionalized Single Graphene Sheets Derived from Splitting Graphite Oxide
Hannes C. Schniepp, Je-Luen Li, Michael J. McAllister, Hiroaki Sai,
Margarita Herrera-Alonso, Douglas H. Adamson, Robert K. Prud'homme, Roberto Car,
Dudley A. Saville, and Ilhan A. Aksay*,
Department of Chemical Engineering, Department of Chemistry, and Princeton Institute for the Science and
Technology of Materials (PRISM), Princeton UniVersity, Princeton, New Jersey 08544
ReceiVed: February 13, 2006; In Final Form: March 16, 2006
A process is described to produce single sheets of functionalized graphene through thermal exfoliation of
graphite oxide. The process yields a wrinkled sheet structure resulting from reaction sites involved in oxidation
and reduction processes. The topological features of single sheets, as measured by atomic force microscopy,
closely match predictions of first-principles atomistic modeling. Although graphite oxide is an insulator,
functionalized graphene produced by this method is electrically conducting.
1. Introduction
Recent studies1-6 of the electrical properties of graphene
sheets produced by peeling off a few sheets with "Scotch" tape
demonstrate the importance of graphene as a 2D crystalline
material for high electron mobility applications.7 Moreover,
when functionalized, single-sheet graphene is expected to serve
as a nanofiller in nanocomposite applications, as functional sites
will favor interactions with the matrix.8 The first attempt to

  

Source: Aksay, Ilhan A. - Department of Chemical Engineering, Princeton University

 

Collections: Materials Science