High-yield production of graphene by liquid-phase exfoliation of graphite
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"High-yield production of graphene b..." refers background in this paper
...From equation (1), we expect a minimal energy cost of exfoliation for solvents whose surface energy matches that of graphene....
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...Coupled with equation (1), this strongly suggests that not only is the enthalpy of mixing for graphite dispersed in good solvents very close to zero, but the solvent–graphite interaction is van der Waals rather than covalent....
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"High-yield production of graphene b..." refers background in this paper
...small. In chemistry, this energy balance is expressed as the enthalpy of mixing (per unit volume) which we can approximately calculate in this case to be: Mix 2 ( )2 G sol Mix flake H V T δ δ φ ∆ ≈ − (1) where i δi =ESur , the square root of the component surface energy, T flake is the thickness of a graphene flake and φ is the graphene volume fraction. Reminiscent of the Hildebrand-Scratchard equati...
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