Frozen capillary waves on glass surfaces: an AFM study
Laboratoire “Surface du Verre et Interfaces”, Unité Mixte CNRS/Saint-Gobain, 39 quai Lucien Lefranc, 93303 Aubervilliers Cedex, France
Corresponding author: a email@example.com
Revised: 26 October 2006
Published online: 29 November 2006
Using atomic force microscopy on silica and float glass surfaces, we give evidence that the roughness of melted glass surfaces can be quantitatively accounted for by frozen capillary waves. In this framework the height spatial correlations are shown to obey a logarithmic scaling law; the identification of this behaviour allows to estimate the ratio kTF/πγ where k is the Boltzmann constant, γ the interface tension and TF the temperature corresponding to the “freezing” of the capillary waves. Variations of interface tension and (to a lesser extent) temperatures of annealing treatments are shown to be directly measurable from a statistical analysis of the roughness spectrum of the glass surfaces.
PACS: 68.35.Ct – Interface structure and roughness / 61.43.Fs – Glasses / 68.03.Cd – Surface tension and related phenomena / 68.37.Ps – Atomic force microscopy (AFM)
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2006