Tuning the permeability of dense membranes by shaping nanoscale potentials

Autor: Kim, Won Kyu, Kanduc, Matej, Roa, Rafael, Dzubiella, Joachim
Rok vydání: 2019
Předmět:
Zdroj: Physical Review Letters, 122, 108001 (2019)
Druh dokumentu: Working Paper
DOI: 10.1103/PhysRevLett.122.108001
Popis: The permeability is one of the most fundamental transport properties in soft matter physics, material engineering, and nanofluidics. Here we report by means of Langevin simulations of ideal penetrants in a nanoscale membrane made of a fixed lattice of attractive interaction sites, how the permeability can be massively tuned, even minimized or maximized, by tailoring the potential energy landscape for the diffusing penetrants, depending on the membrane attraction, topology, and density. Supported by limiting scaling theories we demonstrate that the observed non-monotonic behavior and the occurrence of extreme values of the permeability is far from trivial and triggered by a strong anti-correlation and substantial (orders of magnitude) cancellation between penetrant partitioning and diffusivity, especially within dense and highly attractive membranes.
Comment: 6 pages, 4 figures
Databáze: arXiv