Graphene quantum dots derived from platelet graphite nanofibers by liquid-phase exfoliation

Graphene quantum dots (GQDs) were formed by liquid-phase exfoliation in an ultrasonic bath using platelet graphite nanofibers (PGNFs) as the raw material and dimethyl sulfoxide (DMSO) as the exfoliation agent. PGNFs, carbon fibers with graphene nanosheets stacked perpendicular along the fiber axis,...

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Bibliographic Details
Published inActa materialia Vol. 78; pp. 314 - 319
Main Authors Shih, Yu-Wen, Tseng, Guann-Wei, Hsieh, Cheng-Yu, Li, Yuan-Yao, Sakoda, Akiyoshi
Format Journal Article
LanguageEnglish
Published Kidlington Elsevier Ltd 01.10.2014
Elsevier
Subjects
Applied sciences
Exact sciences and technology
Exfoliation
Graphene quantum dots
Metals. Metallurgy
Platelet graphite nanofibers
Platelet graphite nanofibers
Exfoliation
Graphene quantum dots
Liquid phase
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Summary:Graphene quantum dots (GQDs) were formed by liquid-phase exfoliation in an ultrasonic bath using platelet graphite nanofibers (PGNFs) as the raw material and dimethyl sulfoxide (DMSO) as the exfoliation agent. PGNFs, carbon fibers with graphene nanosheets stacked perpendicular along the fiber axis, were sectioned layer by DMSO for 3h with ultrasonic assistance to create GQDs. The diameters of the derived GQDs were in the range of 10–30nm and fewer than five graphene layers were formed. X-ray photoelectron spectroscopy analysis revealed that no functional groups were grafted onto the GQDs during the process, indicating that the synthetic route produced high-quality GQDs.
ISSN:1359-6454
1873-2453
DOI:10.1016/j.actamat.2014.06.027