Elucidation of the physical factors that control activated transport of penetrants in chemically complex glass-forming liquids.

ABSTRACT: Understanding the activated transport of penetrant or tracer atoms and molecules in condensed phases is a challenging problem in chemistry, materials science, physics, and biophysics. Many angstrom- and nanometer-scale features enter due to the highly variable shape, size, interaction, and conformational flexibility of the penetrant and matrix species, leading to a dramatic diversity of penetrant dynamics. Based on a minimalist model of a spherical penetrant in equilibrated dense matrices of hard spheres, a recent microscopic theory that relates hopping transport to local structure has predicted a novel correlation between penetrant diffusivity and the matrix thermodynamic dimensionless compressibility, S₀(T) (which also quantifies the amplitude of long wavelength

SUBMITTER: Mei B 

PROVIDER: S-EPMC9565165 | biostudies-literature | 2022 Oct

REPOSITORIES: biostudies-literature