Morphological thermodynamics for hard bodies from a controlled expansion

Joshua F Robinson*, Roland Roth, C Patrick Royall

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

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Abstract

The morphometric approach is a powerful ansatz for decomposing the chemical potential for a complex solute into purely geometrical terms. This method has proven accuracy in hard spheres, presenting an alternative to comparatively expensive (classical) density functional theory approaches. Despite this, fundamental questions remain over why it is accurate and how one might include higher-order terms to improve accuracy. We derive the morphometric approach as the exact resummation of terms in the virial series, providing further justification of the approach. The resulting theory is less accurate than previous morphometric theories, but provides fundamental insights into the inclusion of higher-order terms and to extensions to mixtures of convex bodies of arbitrary shape.
Original languageEnglish
JournalPhilosophical Magazine
DOIs
Publication statusPublished - 18 Mar 2020

Keywords

  • soft matter
  • geometry
  • morphology
  • colloids
  • surface tension
  • statistical mechanics
  • statistical physics

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