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Ordering of amphiphilic Janus particles at planar walls: A density functional study.
- Source :
-
Journal of Chemical Physics . 4/21/2011, Vol. 134 Issue 15, p154707. 11p. 1 Diagram, 9 Graphs. - Publication Year :
- 2011
-
Abstract
- We investigate the structure formation of amphiphilic molecules at planar walls using density functional theory. The molecules are modeled as (hard) spheres composed of a hydrophilic and hydrophobic part. The orientation of the resulting Janus particles is described as a vector representing an internal degree of freedom. Our density functional approach involves fundamental measure theory combined with a mean-field approximation for the anisotropic interaction. Considering neutral, hydrophilic, and hydrophobic walls, we study the adsorption of the particles, focusing on the competition between the surface field and the interaction-induced ordering phenomena. Finally, we consider systems confined between two planar walls. It is shown that the anisotropic Janus interaction yields pronounced frustration effects at low temperatures. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00219606
- Volume :
- 134
- Issue :
- 15
- Database :
- Academic Search Index
- Journal :
- Journal of Chemical Physics
- Publication Type :
- Academic Journal
- Accession number :
- 60119294
- Full Text :
- https://doi.org/10.1063/1.3579453