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Enhanced wavelength-dependent surface tension of liquid-vapour interfaces




{Due to the simultaneous presence of bulk-like and interfacial fluctuations the understanding of the structure of liquid-vapour interfaces poses a long-lasting and ongoing challenge for experiments, theory, and simulations. We provide a new analysis of this topic by combining high-quality simulation data for Lennard-Jones fluids with an unambiguous definition of the wave-number\textendashdependent surface tension \gamma(t) based on the two-point correlation function of the fluid. Upon raising the temperature, \gamma(t) develops a maximum at short wavelengths. We compare these results with predictions from density functional theory. Our analysis has repercussions for the interpretation of grazing-incidence small-angle X-ray scattering (GISAXS) at liquid interfaces.}

Author(s): Höfling, Felix and Dietrich, Siegfried
Journal: EPL
Volume: 109
Number (issue): 4
Year: 2015

Department(s): Theory of Inhomogeneous Condensed Matter
Bibtex Type: Article (article)

DOI: 10.1209/0295-5075/109/46002


  title = {Enhanced wavelength-dependent surface tension of liquid-vapour interfaces},
  author = {H\"ofling, Felix and Dietrich, Siegfried},
  journal = {EPL},
  volume = {109},
  number = {4},
  year = {2015}