Left or right cholesterics? A matter of helix handedness and curliness
  We have investigated the relationship between the morphology of helical particles and the features of the cholesteric (N$^\ast $) phase that they form. Using an Onsager-like theory, applied to systems of hard helices, we show that the cholesteric handedness and pitch depend on both the pitch and the curliness of the particles. The theory leads to the definition of pseudoscalars that correlate the helical features of the phase to the chirality of the excluded volume of the constituent particles. 
Elisa Frezza, Alberta Ferrarini, Hima Bindu Kolli, Achille Giacometti,   Giorgio Cinacchi
cond-mat.soft