Physical Review E
banana-shaped Mesogens, Nematic phase, achiral molecules, blue phases, relaxation, transition, Mesophase, states, field, B-2
We found that the optically isotropic (I-M) mesophase observed recently below the nematic phase of the bent-core liquid crystal 4-chlororesorcinol bis[4-(4-n-dodecyloxybenzoyloxy)benzoate] shows ferroelectric-type switching. Polarizing microscopic, electric current, dielectric, and dynamic light scattering studies lead us to propose that the I-M phase is composed of interconnected orthoconic racemic smectic (Sm-CaPF) nanodomains with random layer orientations. Near the nematic phase, where the polarization can be saturated by electric fields, the system responds in a fashion analogous to the granular structure of a magnetic spin glass-in particular, we observed that the relaxation back to the nonpoled structure follows a similar, inverse logarithmic rule.
Liao, Guangxun; Stojadinovic, S.; Pelzl, Gerhard; Weissflog, Wolfgang; Sprunt, Samuel N.; and Jakli, Antal (2005). Optically Isotropic Liquid-Crystal Phase of Bent-Core Molecules with Polar Nanostructure. Physical Review E 72(2). doi: 10.1103/PhysRevE.72.021710 Retrieved from http://digitalcommons.kent.edu/cpippubs/175