Solutions of Negatively Charged Graphene Sheets and Ribbons
Journal of the American Chemical Society2008Vol. 130(47), pp. 15802–15804
Citations Over TimeTop 1% of 2008 papers
Cristina Vallés, Carlos Drummond, Hassan Saadaoui, Clascídia Aparecida Furtado, Maoshuai He, Olivier Roubeau, Luca Ortolani, Marc Monthioux, Alain Pénicaud
Abstract
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).
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