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Density profiles and surface tensions of polymers near colloidal surfaces | | A.A. Louis
; P.G. Bolhuis
; E.J. Meijer
; J.P. Hansen
; | | Date: |
27 Nov 2001 | | Journal: | J. Chem. Phys. 116, 10547 (2002) | | Subject: | Soft Condensed Matter; Statistical Mechanics | cond-mat.soft cond-mat.stat-mech | | Abstract: | 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. | | Source: | arXiv, cond-mat/0111518 | | Services: | Forum | Review | PDF | Favorites | |
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