Long-time translational self-diffusion in isotropic and nematic dispersions of colloidal rods

van Bruggen, Michel; Lekkerkerker, Henk; Maret, Georg; Dhont, Jan

Long-time translational self-diffusion in isotropic and nematic dispersions of colloidal rods

Dateien

Maret_Long-time translational self-diffusion.pdfGröße: 511.02 KBDownloads: 285

Datum

1998

Autor:innen

van Bruggen, Michel

Lekkerkerker, Henk

Maret, Georg

Dhont, Jan

Open Access-Veröffentlichung

Open Access Green

Sammlungen

Physik

Publikationstyp

Zeitschriftenartikel

Publikationsstatus

Published

Erschienen in

Physical Review E. 1998, 58(6), pp. 7668-7677. ISSN 1063-651X. Available under: doi: 10.1103/PhysRevE.58.7668

Zusammenfassung

Long-time self-diffusion in dispersions of rigid colloidal rods with an aspect ratio of 19 is studied with fluorescence recovery after photobleaching (FRAP) in isotropic and nematic phases. The long-time self-diffusion coefficient DsL is found to decrease linearly with concentration up to (L/D)φ=0.12 (with L the length and D the diameter of the rods, and φ the volume fraction). In the isotropic phase in coexistence with the nematic phase, DsL remains virtually constant at about 1% of its value at infinite dilution. In the nematic phase long-time self-diffusion is found to be ten times slower than in the coexisting isotropic phase. In addition, by modifying the FRAP geometry we were able to distinguish between sidewise and lengthwise diffusion in aligned nematic phases.

Fachgebiet (DDC)

530 Physik

Schlagwörter

Colloids, Particle dynamics

Zitieren

ISO 690

VAN BRUGGEN, Michel, Henk LEKKERKERKER, Georg MARET, Jan DHONT, 1998. Long-time translational self-diffusion in isotropic and nematic dispersions of colloidal rods. In: Physical Review E. 1998, 58(6), pp. 7668-7677. ISSN 1063-651X. Available under: doi: 10.1103/PhysRevE.58.7668

BibTex

@article{vanBruggen1998Longt-17452,
  year={1998},
  doi={10.1103/PhysRevE.58.7668},
  title={Long-time translational self-diffusion in isotropic and nematic dispersions of colloidal rods},
  number={6},
  volume={58},
  issn={1063-651X},
  journal={Physical Review E},
  pages={7668--7677},
  author={van Bruggen, Michel and Lekkerkerker, Henk and Maret, Georg and Dhont, Jan}
}

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