Effect of Hydrodynamic Interactions on Self-Diffusion of Quasi-Two-Dimensional Colloidal Hard Spheres

Physical Review Letters
Alice L ThorneyworkJürgen Horbach

Abstract

We compare experimental results from a quasi-two-dimensional colloidal hard sphere fluid to a Monte Carlo simulation of hard disks with small particle displacements. The experimental short-time self-diffusion coefficient D_{S} scaled by the diffusion coefficient at infinite dilution, D_{0}, strongly depends on the area fraction, pointing to significant hydrodynamic interactions at short times in the experiment, which are absent in the simulation. In contrast, the area fraction dependence of the experimental long-time self-diffusion coefficient D_{L}/D_{0} is in quantitative agreement with D_{L}/D_{0} obtained from the simulation. This indicates that the reduction in the particle mobility at short times due to hydrodynamic interactions does not lead to a proportional reduction in the long-time self-diffusion coefficient. Furthermore, the quantitative agreement between experiment and simulation at long times indicates that hydrodynamic interactions effectively do not affect the dependence of D_{L}/D_{0} on the area fraction. In light of this, we discuss the link between structure and long-time self-diffusion in terms of a configurational excess entropy and do not find a simple exponential relation between these quantities for all...Continue Reading

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Citations

Jan 30, 2018·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Alice L ThorneyworkRoel P A Dullens
May 31, 2017·Physical Chemistry Chemical Physics : PCCP·Kim Nygård
Aug 24, 2017·The Journal of Chemical Physics·Swomitra Palit, Anand Yethiraj
Apr 12, 2016·Soft Matter·Alice L ThorneyworkRoel P A Dullens
Apr 30, 2017·Physical Review Letters·Alice L ThorneyworkRoel P A Dullens
Jul 29, 2017·Physical Review Letters·Rattachai PinchaipatC Patrick Royall
May 21, 2019·Physical Review Letters·Luhui NingKe Chen
Apr 15, 2019·The Journal of Chemical Physics·Xiaoguang MaA G Yodh
Feb 18, 2017·Physical Review. E·Alice L ThorneyworkRoel P A Dullens
May 20, 2020·Physical Review. E·Nima H SiboniJürgen Horbach
Aug 31, 2016·Physical Review. E·Erick Sarmiento-GómezRamón Castañeda-Priego
Sep 25, 2020·Advances in Colloid and Interface Science·Valeria Lotito, Tomaso Zambelli
Mar 20, 2021·Physical Review. E·Luhui NingKe Chen
Sep 7, 2017·Langmuir : the ACS Journal of Surfaces and Colloids·Nader Laal DehghaniGordon F Christopher

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