Diffusion of Interacting Particles in Discrete Geometries

作者：Becker T^*; Nelissen K; Cleuren B; Partoens B; Van den Broeck C

来源：Physical Review Letters, 2013, 111(11): 110601.

DOI：10.1103/PhysRevLett.111.110601

We evaluate the self-diffusion and transport diffusion of interacting particles in a discrete geometry consisting of a linear chain of cavities, with interactions within a cavity described by a free-energy function. Exact analytical expressions are obtained in the absence of correlations, showing that the self-diffusion can exceed the transport diffusion if the free-energy function is concave. The effect of correlations is elucidated by comparison with numerical results. Quantitative agreement is obtained with recent experimental data for diffusion in a nanoporous zeolitic imidazolate framework material, ZIF-8.

• 出版日期2013-9-11