Person:
Srinivasarao,
Mohan
Srinivasarao,
Mohan
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ItemRaman Scattering Study of Phase Biaxiality in a Thermotropic Bent-Core Nematic Liquid Crystal(Georgia Institute of Technology, 2010-07) Park, Min Sang ; Yoon, Beom-Jin ; Park, Jung Ok ; Prasad, Veena ; Kumar, Satyendra ; Srinivasarao, MohanPolarized Raman spectroscopy was used to investigate the development of orientational order and the degree of phase biaxiality in a bent-core mesogenic system. The values of the uniaxial order parameters < P-200 > and < P-400 >, and biaxial order parameters < P-220 >, < P-420 >, and < P-400 >, and their evolution with temperature were determined. The temperature dependence of almost all order parameters reveals a second order transition from the uniaxial to biaxial nematic phase with < P-220 > increasing to similar to 0.22 before a first order transition to the smectic-C phase, upon cooling.