V-shaped Molecular Model With Twofold Biaziality For Biazial Nematics

摘要：

Simulations on hard-boomerang fluids previously suggested 1 that the V-shaped (or bent-core) molecules could exhibit a stable biaxial nematic phase. In our paper we consider a different fluid of V-shaped molecules, each composed of two arms jointed at their ends at an angle Ψ. Each arm is a spheroplatelet with its biaxiality. The biaxiality of the V-shaped molecule depends upon this inner biaxiality, and the apex angle Ψ. In this sense our V-shaped molecular model has twofold biaxiality. The occurence of nametic order in such a system has been investigated by Straleyˇs theory, and by bifurcation analysis. We explore the location for the Landau point in terms of particle parameters. We also report the relationship between the structure parameters of the considered molecules and the ability of the relevant fluid to form a biaxial nematic phase.

关键词： Biazial nematic phase V-shaped molecule Landau point bifurcation analysis

作者: WANG Dong-mei ZHENG Gui-li ZHANG Zhi-dong

作者单位: Sciences of School, Hebei University of Technology, Tianjin, 300401, China

会议类型: 国际会议

会议名称: The 11th Asian Symposium on Information Display(ASID09)(第11届亚洲信息显示会议)

会议地点: 广州

会议语种:英文

页码: 213-216

在线出版日期: 2009-10-07（万方平台首次上网日期，不代表论文的发表时间）