High yield and high concentration few-layer graphene sheets using solvent exfoliation of graphite with pre-thermal treatment in a sealed bath

Title
High yield and high concentration few-layer graphene sheets using solvent exfoliation of graphite with pre-thermal treatment in a sealed bath
Authors
후사인 모하마드 모흐신한재량구본철박옥경
Keywords
Carbon material; High dispersion; Mechanical exfoliation; Graphene sheet
Issue Date
2014-05
Publisher
Materials letters
Citation
VOL 123, 90-92
Abstract
We developed an efficient method for exfoliating pristine graphite in an organic solvent to produce a high yield (14%) and high concentration (5.25 mg/mL) of well-dispersed mono-, bi-, and multi-layered graphene sheets. Pre-thermal activation of pristine graphite at 900 °C in a sealed stainless steel bath under high pressure, followed by sonication in a solvent of 1-methyl-2-pyrrolidinone at elevated temperatures produced a solution of homogeneous, well-dispersed, defect-free, and non-oxidized graphene. The resulting electrical conductivities of the graphene sheets were high, up to 849 S/cm.
URI
http://pubs.kist.re.kr/handle/201004/47628
ISSN
0167577X
Appears in Collections:
KIST Publication > Article
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