Density profiles and surface tensions of polymers near colloidal surfaces
摘要
The surface tension of interacting polymers in a good solvent is calculated theoretically and by computer simulations for a planar wall geometry and for the insertion of a single colloidal hard-sphere. This is achieved for the planar wall and for the larger spheres by an adsorption method, and for smaller spheres by a direct insertion technique. Results for the dilute and semi-dilute regimes are compared to results for ideal polymers, the Asakura-Oosawa penetrable-sphere model, and to integral equations, scaling and renormalization group theories. The largest relative changes with density are found in the dilute regime, so that theories based on non-interacting polymers rapidly break down. A recently developed ``soft colloid'' approach to polymer-colloid mixtures is shown to correctly describe the one-body insertion free-energy and the related surface tension.
引用
@article{arxiv.cond-mat/0111518,
title = {Density profiles and surface tensions of polymers near colloidal surfaces},
author = {A. A. Louis and P. G. Bolhuis and E. J. Meijer and J. P. Hansen},
journal= {arXiv preprint arXiv:cond-mat/0111518},
year = {2016}
}