Left or right cholesterics? A matter of helix handedness and curliness

Literature Information

Publication Date 2014-06-16
DOI 10.1039/C4CP01816H
Impact Factor 3.676
Authors

Elisa Frezza, Alberta Ferrarini, Hima Bindu Kolli, Achille Giacometti, Giorgio Cinacchi


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Abstract

Using an Onsager-like theory, we have investigated the relationship between the morphology of hard helical particles and the features (pitch and handedness) of the cholesteric phase that they form. We show that right-handed helices can assemble into right- () and left-handed () cholesterics, depending on their curliness, and that the cholesteric pitch is a non-monotonic function of the intrinsic pitch of particles. The theory leads to the definition of a hierarchy of pseudoscalars, which quantify the difference in the average excluded volume between pair configurations of helices having () and ()-skewed axes. The predictions of the Onsager-like theory are supported by Monte Carlo simulations of the isotropic phase of hard helices, showing how the cholesteric organization, which develops on scales longer than hundreds of molecular sizes, is encoded in the short-range chiral correlations between the helical axes.

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Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
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Self-citation Rate: 10.3%
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