Rapid and Direct Conversion of Graphite Crystals into High-Yielding, Good-Quality Graphene by Supercritical Fluid Exfoliation

Graphene has attracted a great deal of attention in recent years due to its unusual electronic, mechanical, and thermal properties. Exploiting graphene properties in a variety of applications requires a chemical approach for the large‐scale production of high‐quality, processable graphene sheets (GS...

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Bibliographic Details
Published in:Chemistry : a European journal 2010-06, Vol.16 (22), p.6488-6494
Main Authors: Rangappa, Dinesh, Sone, Koji, Wang, Mingsheng, Gautam, Ujjal K., Golberg, Dmitri, Itoh, Hiroshi, Ichihara, Masaki, Honma, Itaru
Format: Article
Language:English
Subjects:
Chemistry
conducting materials
Conversion
Crystals
Diffusivity
Direct conversion
Exfoliation
Graphene
Graphite
Quality
scanning probe microscopy
Supercritical fluids
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Summary:Graphene has attracted a great deal of attention in recent years due to its unusual electronic, mechanical, and thermal properties. Exploiting graphene properties in a variety of applications requires a chemical approach for the large‐scale production of high‐quality, processable graphene sheets (GS), which has remained an unanswered challenge. Herein, we report a rapid one‐pot supercritical fluid (SCF) exfoliation process for the production of high‐quality, large‐scale, and processable graphene for technological applications. Direct high‐yield conversion of graphite crystals to GS is possible under SCF conditions because of the high diffusivity and solvating power of SCFs, such as ethanol, N‐methyl‐pyrrolidone (NMP), and DMF. For the first time, we report a one‐pot direct conversion of graphite crystals to a high yield of graphene sheets in which about 90–95 % of the exfoliated sheets are
ISSN:0947-6539
1521-3765
DOI:10.1002/chem.201000199