1303.0558 (N. I. Lebovka et al.)

Anomalous selective reflection in cholesteryl oleyl carbonate - nematic
5CB mixtures and effects of their doping by single-walled carbon nanotubes    [PDF]

N. I. Lebovka, L. N. Lisetski, M. I. Nesterenko, V. D. Panikarskaya, N. A. Kasian, S. S. Minenko, M. S. Soskin

Liquid crystalline (LC) mixtures of cholesteryl oleyl carbonate (COC) and 4-pentyl-4'-cyanobiphenyl (5CB), as well as dispersions of single-walled carbon nanotubes (NTs) in these mixtures, were studied by means of selective reflection measurements, differential scanning calorimetry (DSC) and optical microscopy. The relative mass of COC in a mixture X was varied between 0.4 and 1.0, the temperature range of measurements was between 284 K and 314 K, and concentration of NTs was fixed at 0.1 %. Two important anomalies were noted: (1) the cholesteric to smectic-A transition temperature increased on dilution of COC by non-smectogenic 5CB in the concentration range 0.8View original: http://arxiv.org/abs/1303.0558