6 papers
Depletion potential in hard-sphere mixtures: theory and applications
R. Roth, R. Evans, S. Dietrich
We present a versatile density functional approach (DFT) for calculating the depletion potential in general fluid mixtures. In contrast to brute force DFT, our approach requires on…
Binary hard-sphere fluids near a hard wall
R. Roth, S. Dietrich
By using the Rosenfeld density functional we determine the number density profiles of both components of binary hard-sphere fluids close to a planar hard wall as well as the corres…
Understanding depletion forces beyond entropy
C. Bechinger, D. Rudhardt, P. Leiderer +2
The effective interaction energy of a colloidal sphere in a suspension containing small amounts of non-ionic polymers and a flat glass surface has been measured and calculated usin…
Depletion potential in hard sphere fluids
B. Götzelmann, R. Roth, S. Dietrich +2
A versatile new approach for calculating the depletion potential in a hard sphere mixture is presented. This is valid for any number of components and for arbitrary densities. We d…
Depletion forces near curved surfaces
R. Roth, B. G"otzelmann, S. Dietrich
Based on density functional theory the influence of curvature on the depletion potential of a single big hard sphere immersed in a fluid of small hard spheres with packing fraction…
Polymer depletion effects near mesoscopic particles
A. Hanke, E. Eisenriegler, S. Dietrich
The behavior of mesoscopic particles dissolved in a dilute solution of long, flexible, and nonadsorbing polymer chains is studied by field-theoretic methods. For spherical and cyli…