This title appears in the Scientific Report :
2015
Please use the identifier:
http://dx.doi.org/10.1039/C5SM01624J in citations.
Please use the identifier: http://hdl.handle.net/2128/9530 in citations.
Near-wall dynamics of concentrated hard-sphere suspensions: comparison of evanescent wave DLS experiments, virial approximation and simulations
Near-wall dynamics of concentrated hard-sphere suspensions: comparison of evanescent wave DLS experiments, virial approximation and simulations
In this article we report on a study of the near-wall dynamics of suspended colloidal hard spheres over a broad range of volume fractions. We present a thorough comparison of experimental data with predictions based on a virial approximation and simulation results. We find that the virial approach d...
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Personal Name(s): | Liu, Yi |
---|---|
Bławzdziewicz, Jerzy / Cichocki, Bogdan / Dhont, Jan K. G. / Lisicki, Maciej / Wajnryb, Eligiusz / Young, Y.-N. / Lang, Peter R. (Corresponding author) | |
Contributing Institute: |
Weiche Materie; ICS-3 |
Published in: | Soft matter, 11 (2015) 37, S. 7316 - 7327 |
Imprint: |
London
Royal Soc. of Chemistry
2015
|
DOI: |
10.1039/C5SM01624J |
PubMed ID: |
26264420 |
Document Type: |
Journal Article |
Research Program: |
Functional Macromolecules and Complexes |
Link: |
OpenAccess OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/9530 in citations.
In this article we report on a study of the near-wall dynamics of suspended colloidal hard spheres over a broad range of volume fractions. We present a thorough comparison of experimental data with predictions based on a virial approximation and simulation results. We find that the virial approach describes the experimental data reasonably well up to a volume fraction of ϕ ≈ 0.25 which provides us with a fast and non-costly tool for the analysis and prediction of evanescent wave DLS data. Based on this we propose a new method to assess the near-wall self-diffusion at elevated density. Here, we qualitatively confirm earlier results [Michailidou, et al., Phys. Rev. Lett., 2009, 102, 068302], which indicate that many-particle hydrodynamic interactions are diminished by the presence of the wall at increasing volume fractions as compared to bulk dynamics. Beyond this finding we show that this diminishment is different for the particle motion normal and parallel to the wall. |