Gas-liquid phase transition in a binary mixture with an interaction that creates constant density profiles

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2021
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Roth, Roland
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If, in a hard sphere fluid, a single (test) particle is fixed, the other particles display a density profile that possesses long-ranged oscillations. Surprisingly, one can show via classical density functional theory that it takes a simple, purely repulsive (external) potential with a finite range in addition to the fixed hard sphere that forces these oscillations to vanish completely. This can give rise to interesting phenomena; however, it gained little attention in the past. In this work, we use the potential in question as an inter-component interaction in a binary hard-sphere mixture, where it is shown that the effective interaction induced by one component resembles qualitatively the well-known Asakura–Oosawa–Vrij potential and can lead to a liquid–gas phase transition in the other component.

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ISO 690DITZ, Nikolas, Roland ROTH, 2021. Gas-liquid phase transition in a binary mixture with an interaction that creates constant density profiles. In: The Journal of Chemical Physics. American Institute of Physics (AIP). 2021, 154(20), 204905. ISSN 0021-9606. eISSN 1089-7690. Available under: doi: 10.1063/5.0048784
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@article{Ditz2021Gasli-54191,
  year={2021},
  doi={10.1063/5.0048784},
  title={Gas-liquid phase transition in a binary mixture with an interaction that creates constant density profiles},
  number={20},
  volume={154},
  issn={0021-9606},
  journal={The Journal of Chemical Physics},
  author={Ditz, Nikolas and Roth, Roland},
  note={Article Number: 204905}
}
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