On the methods to determine surface energies

    Research output: Contribution to journalArticleScientificpeer-review

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    Abstract

    There is a prevailing dispute on methods to determine surface energies of surfaces involving a solid. The most widely used methods are the surface component (STC) theory and the equation of state (EQS) approach. Several versions of these basic theories have been developed, and their predictions for various systems differ but are of the same order of magnitude. However, the solid/liquid surface energies determined by the methods based on the effect of interface curvature on the equilibrium phase change temperature, as described by the Gibbs−Thomson (G−T) equation, are 2 orders of magnitude higher than those determined by the STC and the EQS. This controversy is addressed here by critically analyzing both the thermodynamic and mechanical derivations of the G−T equation. It is concluded that none of the arguments recently presented against the use of the G−T equation, to explain the discrepancy, appear to be valid. Consequently, it appears that both the STC theory and the EQS approach may be incorrect.
    Original languageEnglish
    Pages (from-to)7669 - 7672
    Number of pages4
    JournalLangmuir
    Volume16
    Issue number20
    DOIs
    Publication statusPublished - 2000
    MoE publication typeA1 Journal article-refereed

    Fingerprint

    Equations of state
    Interfacial energy
    surface energy
    equations of state
    liquid surfaces
    Phase equilibria
    derivation
    curvature
    Thermodynamics
    thermodynamics
    Liquids
    predictions
    Temperature
    temperature

    Cite this

    Makkonen, Lasse. / On the methods to determine surface energies. In: Langmuir. 2000 ; Vol. 16, No. 20. pp. 7669 - 7672.
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    On the methods to determine surface energies. / Makkonen, Lasse.

    In: Langmuir, Vol. 16, No. 20, 2000, p. 7669 - 7672.

    Research output: Contribution to journalArticleScientificpeer-review

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    T1 - On the methods to determine surface energies

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    AB - There is a prevailing dispute on methods to determine surface energies of surfaces involving a solid. The most widely used methods are the surface component (STC) theory and the equation of state (EQS) approach. Several versions of these basic theories have been developed, and their predictions for various systems differ but are of the same order of magnitude. However, the solid/liquid surface energies determined by the methods based on the effect of interface curvature on the equilibrium phase change temperature, as described by the Gibbs−Thomson (G−T) equation, are 2 orders of magnitude higher than those determined by the STC and the EQS. This controversy is addressed here by critically analyzing both the thermodynamic and mechanical derivations of the G−T equation. It is concluded that none of the arguments recently presented against the use of the G−T equation, to explain the discrepancy, appear to be valid. Consequently, it appears that both the STC theory and the EQS approach may be incorrect.

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