抄録
We performed dielectric relaxation measurements for 5CB/benzene mixtures in the frozen state at frequencies from 40Hz to 10GHz and for liposome/water dispersion systems at frequencies from 300MHz to 20GHz. When 5CB/benzene mixtures take Nematic (N) phase from Isotropic (Iso) phase with increasing concentration, the relaxation time distribution parameter, beta. becomes smaller. On the other hand, gel liquid crystal (LC) phase transition for liposome/water system is characterized by a change in the parameter beta. The beta value in the LC phase is smaller than that in the gel phase. It is considered that the larger fluctuation of water molecules is realized by interaction between water and lipid molecules in the LC phase with higher mobility. Therefore, dynamical behaviors of LC and liposome in the LC phase are reflected by smaller beta values with respective molecular mechanisms.
