| Issue |
Europhys. Lett.
Volume 71, Number 4, August 2005
|
|
|---|---|---|
| Page(s) | 692 - 698 | |
| Section | Interdisciplinary physics and related areas of science and technology | |
| DOI | https://doi.org/10.1209/epl/i2005-10127-x | |
| Published online | 22 July 2005 | |
Self-diffusion of rod-like viruses in the nematic phase
1
IFF, Institut Weiche Materie, Forschungszentrum Jülich - D-52425 Jülich, Germany
2
Rowland Institute at Harvard, Harvard University - Cambridge, MA 02142, USA
Received:
21
March
2005
Accepted:
17
June
2005
We measure the self-diffusion of colloidal rod-like virus fd in
an isotropic and nematic phase. A low-volume fraction of viruses
are labelled with a fluorescent dye and dissolved in a background
of unlabelled rods. The trajectories of individual rods are
visualized using fluorescence microscopy from which the diffusion
constant is extracted. The diffusion parallel (
)
and perpendicular (
) to the nematic director is
measured. The ratio (
) increases
monotonically with increasing virus concentration. Crossing the
isotropic-nematic phase boundary results in increase of
and decrease of when compared to the
diffusion in the isotropic phase (
).
PACS: 82.70.-y – Disperse systems; complex fluids / 61.30.-v – Liquid crystals / 66.10.-x – Diffusion and ionic conduction in liquids
© EDP Sciences, 2005
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