![Sample our Physical Sciences journals, sign in here to start your FREE access for 14 days]({"type":"image" , "src" : "/sda/110819/TOC-Subject-Sample-2021-Physical-Sciences.jpg"})
Abstract
Broadband dielectric spectroscopy was applied to investigate the influence of confinement on the dynamics of dielectric modes in MBBA, dispersed in porous matrix with parallel cylindrical pores, 200 Å in diameter. Both molecular modes due to the molecular rotation around its short and long axis were observed in the pores. The confinement results in the modification of the bulk-like modes and of the temperature dependencies of the relaxation times. Two low frequency modes due to relaxation of interfacial polarization (collective mode) and reori-entational dynamics of molecules at liquid crystal-pore wall interface (surface mode) were observed. The relaxation time of the surface mode has strong glasslike temperature dependence.
