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Hydrodynamic interactions may enhance the self-diffusion of colloidal particles

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1997

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Zahn, Klaus
Méndez-Alcaraz, Jose M.

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Physical Review Letters. 1997, 79(1), pp. 175-178. ISSN 0031-9007. Available under: doi: 10.1103/PhysRevLett.79.175

Zusammenfassung

We report experimental evidence for an enhancement, due to the hydrodynamic interactions (HI), of the self-diffusion function Ds(t) of colloidal particles at intermediate and long times. Monolayers of paramagnetic polystyrene spheres confined to an air/water interface are studied using digital videomicroscopy. The interparticle potential tuned by an external magnetic field is accurately calibrated by comparing measured radial distribution functions with computer simulation results. This allows one to separate the effects of HI on Ds(t) from those of the direct interactions.

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530 Physik

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ISO 690ZAHN, Klaus, Jose M. MÉNDEZ-ALCARAZ, Georg MARET, 1997. Hydrodynamic interactions may enhance the self-diffusion of colloidal particles. In: Physical Review Letters. 1997, 79(1), pp. 175-178. ISSN 0031-9007. Available under: doi: 10.1103/PhysRevLett.79.175
BibTex
@article{Zahn1997Hydro-16691,
  year={1997},
  doi={10.1103/PhysRevLett.79.175},
  title={Hydrodynamic interactions may enhance the self-diffusion of colloidal particles},
  number={1},
  volume={79},
  issn={0031-9007},
  journal={Physical Review Letters},
  pages={175--178},
  author={Zahn, Klaus and Méndez-Alcaraz, Jose M. and Maret, Georg}
}
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    <dcterms:abstract xml:lang="eng">We report experimental evidence for an enhancement, due to the hydrodynamic interactions (HI), of the self-diffusion function Ds\(t\) of colloidal particles at intermediate and long times. Monolayers of paramagnetic polystyrene spheres confined to an air/water interface are studied using digital videomicroscopy. The interparticle potential tuned by an external magnetic field is accurately calibrated by comparing measured radial distribution functions with computer simulation results. This allows one to separate the effects of HI on Ds\(t\) from those of the direct interactions.</dcterms:abstract>
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