Solutions of Negatively Charged Graphene Sheets and Ribbons

Negatively charged graphene layers from a graphite intercalation compound spontaneously dissolve in N-methylpyrrolidone, without the need for any sonication, yielding stable, air-sensitive, solutions of laterally extended atom-thick graphene sheets and ribbons with dimensions over tens of micrometer...

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Bibliographic Details
Published in:Journal of the American Chemical Society 2008-11, Vol.130 (47), p.15802-15804
Main Authors: Vallés, Cristina, Drummond, Carlos, Saadaoui, Hassan, Furtado, Clascidia A, He, Maoshuai, Roubeau, Olivier, Ortolani, Luca, Monthioux, Marc, Pénicaud, Alain
Format: Article
Language:English
Subjects:
Chemical Sciences
Material chemistry
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Summary:Negatively charged graphene layers from a graphite intercalation compound spontaneously dissolve in N-methylpyrrolidone, without the need for any sonication, yielding stable, air-sensitive, solutions of laterally extended atom-thick graphene sheets and ribbons with dimensions over tens of micrometers. These can be deposited on a variety of substrates. Height measurements showing single-atom thickness were performed by STM, AFM, multiple beam interferometry, and optical imaging on Sarfus wafers, demonstrating deposits of graphene flakes and ribbons. AFM height measurements on mica give the actual height of graphene (ca. 0.4 nm).
ISSN:0002-7863
1520-5126
DOI:10.1021/ja808001a