The dynamic properties of confined antiferroelectric liquid crystal investigated by photon correlation spectroscopy

摘要

Dynamic light scattering was used to examine ferrielectric liquid crystalline phases in porous media. Whereas in larger pores (2000 A) ferrielectric phases were observed, they were not found in the smallest pores (200 A). Additionally, the temepratures of SmC - SmA phase transition were found to be suppressed in the pores relative to bulk, while SmC_A- SmC_( gamma )hase transition is not affected by the confinement. These observations have been explained by the structural aspects of antiferroelectric liquid crystalline materials in a confined geometry and show that importance of long range electrostatic interaction for existence of ferrielectric phases.