[15p-W9_323-1~12] 22.1 Joint Session M "Phonon Engineering"

5:00 PM - 5:15 PM JST(8:00 AM - 8:15 AM UTC)

[15p-W9_323-12] Thermal diffusivity anisotropy of cyanobihenylyl dimer liquid crystals and carbon number dependencies

〇Daichi Aizawa¹, Meguya Ryu¹, Hidemine Furuya¹, Fumito Araoka², Junko Morikawa¹ (1.Science Tokyo., 2.RIKEN)

Keywords:

dimer liquid crystal,thermal diffusivity,anisotropy

CBA-n is dimer liquid crystals composed of two cyanobiphenyl mesogenic units connected by a flexible alkyl spacer containing n carbon atoms. It is known that CBA-9 and CBA-10 exhibit different stable molecular conformations in the nematic phase. In this study, we controlled the molecular orientation of CBA-9 and CBA-10 and measured the anisotropy of thermal diffusivity using the temperature-wave analysis method. In addition, all-atom molecular dynamics simulations were performed to analyze molecular motions. By comparing the experimental and simulation results, we discuss the correlation between the orientational order of molecules and voids and the anisotropy of thermal diffusivity.