Effect of carbon nanotube on phase transitions of nematic liquid crystals
Phase diagrams of multiwall carbon nanotube (MWNT)/nematic liquid crystal (E7) and bucky ball (C60)/nematic liquid crystal binary systems were investigated by means of optical microscopy and differential scanning calorimetry (DSC). It was found that the isotropic-nematic phase transition temperature of liquid crystal component is enhanced by MWNT. A chimney type phase diagram occur over a narrow range of 0.1-0.2ball/E7 system did not showed any changes of TNI in the same concentration range. This behavior has been attributed to anisotropic alignment of carbon nanotubes and liquid crystal molecules, which is entropic in origin.
Duran, Hatice; Gazdecki, Bruce; Yamashita, Atsushi; and Kyu, Thein, "Effect of carbon nanotube on phase transitions of nematic liquid crystals" (2005). Polymer Engineering Faculty Research. 966.