Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 134, Issue 20, Pages 8302-8305Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ja211869u
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Funding
- EPSRC
- BOC Linde
- EPSRC [EP/G007314/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/G007314/1] Funding Source: researchfish
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Solutions of negatively charged graphene (graphenide) platelets were produced by intercalation of nanographite with liquid potassium-ammonia followed by dissolution in tetrahydrofuran. The structure and morphology of these solutions were then investigated by small-angle neutron scattering. We found that >95 vol % of the solute is present as single-layer graphene sheets. These charged sheets are flat over a length scale of >150 A in solution and are strongly solvated by a shell of solvent molecules. Atomic force microscopy on drop-coated thin films corroborated the presence of monolayer graphene sheets. Our dissolution method thus offers a significant increase in the monodispersity achievable in graphene solutions.
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