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Author

Park, Hyesung
Sustainable Energy, Low-Dimensional Materials & Functional Devices Lab
Research Interests
  • Nano materials, renewable energy, optoelectronic devices

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High-efficiency exfoliation of large-area mono-layer graphene oxide with controlled dimension

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Title
High-efficiency exfoliation of large-area mono-layer graphene oxide with controlled dimension
Author
Park, Won KyuYoon, YeojoonSong, Young HyunChoi, Su YeonKim, SeungduDo, YoungjinLee, JunghyunPark, HyesungYoon, Dae HoYang, Woo Seok
Issue Date
201711
Publisher
NATURE PUBLISHING GROUP
Citation
SCIENTIFIC REPORTS, v.7, no., pp.16414 -
Abstract
In this work, we introduce a novel and facile method of exfoliating large-area, single-layer graphene oxide using a shearing stress. The shearing stress reactor consists of two concentric cylinders, where the inner cylinder rotates at controlled speed while the outer cylinder is kept stationary. We found that the formation of Taylor vortex flow with shearing stress can effectively exfoliate the graphite oxide, resulting in large-area single- or few-layer graphene oxide (GO) platelets with high yields (>90%) within 60 min of reaction time. Moreover, the lateral size of exfoliated GO sheets was readily tunable by simply controlling the rotational speed of the reactor and reaction time. Our approach for high-efficiency exfoliation of GO with controlled dimension may find its utility in numerous industrial applications including energy storage, conducting composite, electronic device, and supporting frameworks of catalyst.
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DOI
http://dx.doi.org/10.1038/s41598-017-16649-y
ISSN
2045-2322
Appears in Collections:
ECHE_Journal Papers
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