Journal Article

PreJuSER-42897

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Density depletion profile and solvation free energy of a colloidal particle in a polymer solution

Maassen, R.FZJ* ; Eisenriegler, E.FZJ* ; Bringer, A.FZJ*

2001
American Institute of Physics Melville, NY

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Please use a persistent id in citations: http://hdl.handle.net/2128/1388  doi:10.1063/1.1394206

Abstract: The solvation free energy and polymer density depletion profile of a single mesoscopic colloidal particle in a solution of free nonadsorbing polymer chains are investigated theoretically. Keeping both the particle to polymer size ratio and the degree of inter-chain overlap arbitrary, we see how the qualitatively different behavior evolves in the limits of small and large size ratios and of dilute and semidilute solutions. While most of our results are obtained within a mean-field approach, we also use a "renormalized tree approximation" to estimate the surface tension and the coefficient of spontaneous curvature in a Helfrich expansion for large particle to polymer size ratio. There is a weak maximum in the polymer density profile for arbitrary size ratio. For small size ratio the maximum can be explained in terms of a minimum in the bulk polymer density correlation function. (C) 2001 American Institute of Physics.

Keyword(s): J

Note: Record converted from VDB: 12.11.2012

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Contributing Institute(s):

1. Theorie I (IFF-TH-I)
2. Theorie II (IFF-TH-II)

Research Program(s):

1. Elektronische Struktur von Festkörpern, Oberflächen und Schichtsystemen (23.20.0)
2. Polymere, Membranen und komplexe Flüssigkeiten (23.30.0)

Appears in the scientific report 2001
Notes: This version is available at the following Publisher URL: http://jcp.aip.org

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