Journal
CARBON LETTERS
Volume 14, Issue 2, Pages 89-93Publisher
SPRINGER
DOI: 10.5714/CL.2013.14.2.089
Keywords
graphene; size sorting; centrifugation
Funding
- Fundamental R&D Program for Core Technology of Materials - Ministry of Knowledge Economy (MKE)
- IT R&D Program of MKE/KEIT
- Center for Advanced Soft Electronics under the Global Frontier Research Program of the Ministry of Education, Science and Technology
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Size-sorted graphene nanoplatelets are highly desired for fundamental research and technological applications of graphene. Here we show a facile approach for fabricating size-sorted graphene oxide (GO) nanoplatelets by a simple centrifugal method using different dispersion solvents. We found that the small-sized GO nanoplatelets were more effectively separated when dispersed in water or dimethylformamide (DMF) than in an alkali aqueous solution. After several iterations of the centrifugation, the sizes of GO in the supernatant solution were mostly several micrometers. We found that the GO area was not strongly correlated with the C-O content of the GO dispersed in water. However, the size-sorted GO nanoplatelets in DMF showed different C-O content, since DMF can reduce GO nanoplatelets during exfoliation and centrifugation processes.
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