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Phys. Rev. Lett. 87, 088301 (2001) [4 pages]

Colloidal Interactions in Suspensions of Rods

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Keng-hui Lin, John C. Crocker*, Ana C. Zeri†, and A. G. Yodh
Department of Physics and Astronomy, University of Pennsylvania, 209 S. 33rd Street, Philadelphia, Pennsylvania 19104-6396

See Also: Erratum

Received 13 April 2001; published 1 August 2001

We report direct measurements of entropic interactions of colloidal spheres in suspensions of rodlike fd bacteriophage. We investigate the influence of sphere size, rod concentration, and ionic strength on these interactions. Although the results compare favorably with a recent calculation, small discrepancies reveal entropic effects due to rod flexibility. At high salt concentrations, the potential turns repulsive as a result of viral adsorption on the spheres and viral bridging between the spheres.

© 2001 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.87.088301
DOI:
10.1103/PhysRevLett.87.088301
PACS:
82.70.Dd, 05.40.-a, 87.15.La

*Current address: Department of Applied Physics, Caltech, Mail Code 128-95, Pasadena, California 91125.

†Current address: Department of Chemistry and Biochemistry, University of California at San Diego, La Jolla, California 92093.

See Also

Erratum: Keng-hui Lin, John C. Crocker, Ana C. Zeri, and A. G. Yodh, Erratum: Colloidal Interactions in Suspensions of Rods [Phys. Rev. Lett. 87, 088301 (2001)], Phys. Rev. Lett. 87, 269902 (2001).

 
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