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Microwave synthesis of large few-layer graphene sheets in aqueous solution of ammonia

Janowska, Izabela and Chizari, Kambiz and Ersen, Ovidiu and Zafeiratos, Spyridon and Soubane, Driss and Costa, Victor Da and Speisser, Virginie and Boeglin, Christine and Houllé, Matthieu and Bégin, Dominique and Plee, Dominique and Ledoux, Marc-Jacques and Pham-Huu, Cuong (2010) Microwave synthesis of large few-layer graphene sheets in aqueous solution of ammonia. Nano Research, 3 (2). pp. 126-137.

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Abstract

Few-layer graphene (FLG) sheets with sizes exceeding several micrometers have been synthesized by exfoliation of expanded graphite in aqueous solution of ammonia under microwave irradiation, with an overall yield approaching 8 wt.%. Transmission electron microscopy (in bright-field and dark-field modes) together with electron diffraction patterns and atomic force microscopy confirmed that this graphene material consisted mostly of mono-, bi- or few-layer graphene (less than ten layers). The high degree of surface reduction was confirmed by X-ray photoelectron and infrared spectroscopies. In addition, the high stability of the FLG in the liquid medium facilitates the deposition of the graphene material onto several substrates via low-cost solution-phase processing techniques, opening the way to subsequent applications of the material.

Item Type:Article
Subjects:Physical Science > Nanophysics
Physical Science > Nano objects
Material Science > Nanochemistry
Material Science > Nanostructured materials
Divisions:Faculty of Engineering, Science and Mathematics > School of Physics
Faculty of Engineering, Science and Mathematics > School of Chemistry
ID Code:8225
Deposited By:JNCASR
Deposited On:10 Feb 2010 09:11
Last Modified:10 Sep 2010 11:36

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