Cholesteric Phase in Virus Suspensions

Details Cholesteric Phase in Virus Suspensions Cholesteric Phase in Virus Suspensions

2000-03-28

arxiv.org/abs/cond-mat/0003434v1

Langmuir 16, 7820 (2000)

Physics

Condensed Matter

Soft Condensed Matter

Submitted to Langmuir, See web site http://www.elsie.brandeis.edu

Scientific paper

We report measurements of the cholesteric pitch and twist elastic constant $(K_{22})$ in monodisperse suspensions of the rod-like virus filamentous bacteriophage {\it fd}. Measurements were taken for concentrations spanning the entire cholesteric region at several ionic strengths and temperatures. In the limit of high ionic strength the cholesteric pitch $(P_0)$ scales with concentration (c) as $P_0 \propto c^{-1.66}$. As the ionic strength decreases the scaling exponent systematically changes to lower values.

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