期刊
JOURNAL OF MATERIALS CHEMISTRY C
卷 1, 期 9, 页码 1870-1875出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2tc00586g
关键词
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资金
- Ministry of Education, Science and Technology, Korea through Global Research Laboratory (GRL) program
- Ministry of Education, Science and Technology, Korea through World Class University (WCU) program
A high-yielding dispersion of graphene at high concentration in solvent is critical for practical applications. Herein, we demonstrate the formation of a stable dispersion of pristine graphene in ethanol by exfoliating graphite flakes into individual graphene layers using a non-ionic polymer surfactant under bath-type sonication. Oligothiophene-terminated poly(ethylene glycol) was synthesized and used as a non-ionic and amphiphilic surfactant for exfoliating graphite into graphene. A high-quality graphene film was fabricated from the exfoliated graphene solution by the vacuum filtration method. TEM and SEM reveal that the size of exfoliated graphene flakes is larger than 1 mu m. When the graphene film was treated with nitric acid and thionyl chloride after washing with solvent, the film showed high performance with a sheet resistance of 0.3 k Omega sq(-1) and a transparency of 74% at 550 nm.
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