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Article Dans Une Revue Surface Science : A Journal Devoted to the Physics and Chemistry of Interfaces Année : 2004

Absolute surface energy determination

Pierre Müller

Résumé

Experimental determination of absolute surface energies remains a challenge. We propose a simple method based on two independent measurements on 3D and 2D equilibrium shapes completed by the analysis of the thermal fluctuation of an isolated step. Using then basic equations (WulffÕ theorem, Gibbs-Thomson equation, thermodynamics fluctuation of an isolated step) allows us to extract the absolute surface free energy of a singular face. The so-proposed method can be applied when (i) all orientations exist on the equilibrium shape, (ii) the surface stress is isotropic. This procedure is applied to the case of Si(1 1 1) where we find 0.59 J m À2 6 c ð1 1 1Þ 6 0.83 J m À2 at 1373 K.

Dates et versions

hal-01967007 , version 1 (04-01-2019)

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J.J J Métois, Pierre Müller. Absolute surface energy determination. Surface Science : A Journal Devoted to the Physics and Chemistry of Interfaces, 2004, 548 (1-3), pp.13-21. ⟨10.1016/j.susc.2003.11.027⟩. ⟨hal-01967007⟩

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