Qian, Wen and Hao, Rui and Hou, Yanglong and Tian, Yuan and Shen, Chengmin and Gao, Hongjun and Liang, Xuelei (2009) Solvothermal-assisted exfoliation process to produce graphene with high yield and high quality. Nano Research, 2 (9). pp. 706-712.
Monolayer and bilayer graphene sheets have been produced by a solvothermal-assisted exfoliation process in a highly polar organic solvent, acetonitrile, using expanded graphite (EG) as the starting material. It is proposed that the dipole-induced dipole interactions between graphene and acetonitrile facilitate the exfoliation and dispersion of graphene. The facile and effective solvothermal-assisted exfoliation process raises the low yield of graphene reported in previous syntheses to 10 wt%–12 wt%. By means of centrifugation at 2000 rpm for 90 min, monolayer and bilayer graphene were separated effectively without the need to add a stabilizer or modifier. Electron diffraction and Raman spectroscopy indicate that the resulting graphene sheets are high quality products without any significant structural defects.
|Subjects:||Material Science > Nanofabrication processes and tools|
Material Science > Nanochemistry
Material Science > Nanostructured materials
|Deposited On:||26 Aug 2010 08:39|
|Last Modified:||26 Aug 2010 08:39|
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