Ionic diffusion in dynamically-disordered materials: Motion on a renewing, percolative lattice

Mark C. Lonergan, A. Nitzan, Mark A. Ratner

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Abstract

Diffusion in concentrated ionic solutions involves ionic motion subject both to interionic Coulomb forces and to the fluctuating potentials arising from solvent motion. To study how these reflect themselves in the ion transport, we examine a problem in which Coulomb particles hop on a lattice that is percolative (some jumps are forbidden) and renewing (the forbidden jumps evolve in time). Diffusivity and tracer correlation are both effected by both renewal and Coulomb interaction. Coulomb effects can destroy the validity of the dynamic percolation result that the diffusivity is proportional to the renewal rate; non-exponential decay of the energy fluctuation correlation function is observed.

Original languageEnglish
Pages (from-to)269-288
Number of pages20
JournalJournal of Molecular Liquids
Volume60
Issue number1-3
DOIs
Publication statusPublished - Jul 1994

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ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Spectroscopy
  • Physical and Theoretical Chemistry
  • Materials Chemistry

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