Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 130, Issue 47, Pages 15802-+Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ja808001a
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Funding
- CNRS
- ANR (Tricotra)
- GDR-I [2756]
- CNEN
- CNPq
- FAPEMIG
- MCT/Brazilian Carbon Nanotube Network
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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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