Gibbs energy of repulsion (between two surfaces) |
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Gibbs energy of repulsion due to electric effects |
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 |
Gibbs energy of repulsion per unit area of two parallel plates |
| ,
 |
Gibbs energy of attraction of two surfaces |
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Gibbs energy of attraction per unit area of two parallel plates |
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Van der Waals-London attraction constant between two molecules (
) |
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(Van der Waals-)Hamaker constant between semi-infinite flat plates, distance apart ( = number of molecules per unit volume) (
) |
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Retarded van der Waals constant between two molecules (
) |
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Retarded van der Waals constant between semi-infinite flat plates, distance apart (
) |
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Total Gibbs energy of interaction (and per unit area of two parallel plates) |
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Disjoining pressure (
) |
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