Elongation and fluctuations of semi-flexible polymers in a nematic solvent

Details Elongation and fluctuations of semi-flexible polymers in a nematic solvent Elongation and fluctuations of semi-flexible polymers in a nematic solvent

2004-01-12

arxiv.org/abs/cond-mat/0401189v1

Phys. Rev. Lett. 92 (2004) 125503

Physics

Condensed Matter

Soft Condensed Matter

4 pages, 4 figures, submitted to PRL

Scientific paper

10.1103/PhysRevLett.92.125503

We directly visualize single polymers with persistence lengths ranging from $\ell_p=0.05$ to 16 $\mu$m, dissolved in the nematic phase of rod-like {\it fd} virus. Polymers with sufficiently large persistence length undergo a coil-rod transition at the isotropic-nematic transition of the background solvent. We quantitatively analyze the transverse fluctuations of semi-flexible polymers and show that at long wavelengths they are driven by the fluctuating nematic background. We extract both the Odijk deflection length and the elastic constant of the background nematic phase from the data.

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