This title appears in the Scientific Report :
2011
Please use the identifier:
http://dx.doi.org/10.1063/1.3604813 in citations.
Please use the identifier: http://hdl.handle.net/2128/4636 in citations.
Rotational and translational self-diffusion in concentrated suspensions of permeable particles
Rotational and translational self-diffusion in concentrated suspensions of permeable particles
In our recent work on concentrated suspensions of uniformly porous colloidal spheres with excluded volume interactions, a variety of short-time dynamic properties were calculated, except for the rotational self-diffusion coefficient. This missing quantity is included in the present paper. Using a pr...
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Personal Name(s): | Abade, G.C. |
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Cichocki, B. / Ekiel-Jezewska, M.L. / Nägele, G. / Wajnryb, E. | |
Contributing Institute: |
Weiche Materie; ICS-3 |
Published in: | The @journal of chemical physics, 134 (2011) S. 244903 |
Imprint: |
Melville, NY
American Institute of Physics
2011
|
Physical Description: |
244903 |
DOI: |
10.1063/1.3604813 |
PubMed ID: |
21721660 |
Document Type: |
Journal Article |
Research Program: |
BioSoft: Makromolekulare Systeme und biologische Informationsverarbeitung |
Series Title: |
Journal of Chemical Physics
134 |
Subject (ZB): | |
Link: |
Get full text OpenAccess Published under German "Allianz" Licensing conditions on 2011-06-29. Available in OpenAccess from 2011-06-29 |
Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/4636 in citations.
In our recent work on concentrated suspensions of uniformly porous colloidal spheres with excluded volume interactions, a variety of short-time dynamic properties were calculated, except for the rotational self-diffusion coefficient. This missing quantity is included in the present paper. Using a precise hydrodynamic force multipole simulation method, the rotational self-diffusion coefficient is evaluated for concentrated suspensions of permeable particles. Results are presented for particle volume fractions up to 45% and for a wide range of permeability values. From the simulation results and earlier results for the first-order virial coefficient, we find that the rotational self-diffusion coefficient of permeable spheres can be scaled to the corresponding coefficient of impermeable particles of the same size. We also show that a similar scaling applies to the translational self-diffusion coefficient considered earlier. From the scaling relations, accurate analytic approximations for the rotational and translational self-diffusion coefficients in concentrated systems are obtained, useful to the experimental analysis of permeable-particle diffusion. The simulation results for rotational diffusion of permeable particles are used to show that a generalized Stokes-Einstein-Debye relation between rotational self-diffusion coefficient and high-frequency viscosity is not satisfied. |