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Journal of Chemical Physics / Volume 135 / Issue 14 / ARTICLES / Theoretical Methods and Algorithms

J. Chem. Phys. 135, 144106 (2011); http://dx.doi.org/10.1063/1.3646951 (13 pages)

The effects of shape and flexibility on bio-engineered fd-virus suspensions

M. Dennison1, M. Dijkstra1, and R. van Roij2

1Soft Condensed Matter, Debye Institute for Nanomaterials Science, Utrecht University, Princetonplein 5, 3584 CC Utrecht, The Netherlands
2Institute for Theoretical Physics, Utrecht University, Leuvenlaan 4, 3584 CE Utrecht, The Netherlands

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(Received 5 July 2011; accepted 16 September 2011; published online 11 October 2011)

We present a theoretical model to describe binary mixtures of semi-flexible rods, applied here to fd-virus suspensions. We investigate the effects of rod stiffness on both monodisperse and binary systems, studying thick-thin and long-short mixtures. For monodisperse systems, we find that fd-virus particles have to be made extremely stiff to even approach the behavior of rigid rods. For thick-thin mixtures, we find increasingly rich phase behavior as the rods are either made more flexible or if their diameter ratio is increased. For long-short rod mixtures we find that the phase behavior is controlled by the relative stiffness of the rods, with increasing the stiffness of the long rods or decreasing that of the short rods resulting in richer phase behavior. We also calculate the state point dependent effective shape of the rods. The flexible rods studied here always behave as shorter, thicker rigid rods, but with an effective shape that varies widely throughout the phase diagrams, and plays a key role in determining phase behavior.

© 2011 American Institute of Physics

Article Outline

  1. INTRODUCTION
  2. THEORY
  3. MONODISPERSE SYSTEMS
  4. BINARY MIXTURES
    1. Unmodified thick-thin fd-virus mixtures
    2. Modified thick-thin fd-virus mixtures
    3. Long-short fd-virus mixtures
  5. CONCLUSIONS

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KEYWORDS and PACS

Keywords

bending, biomechanics, cellular biophysics, microorganisms, phase diagrams, physiological models, suspensions

PACS

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3646951

PUBLICATION DATA

ISSN

0021-9606 (print)  
1089-7690 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.
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