X-ray diffraction from the uniaxial and biaxial nematic phases of bent-core mesogens

被引：24

作者：

Acharya, Bharat R. ^{[1
]}

Kang, Shin-Woong ^{[2
]}

Kumar, Satyendra ^{[2
,3
]}

机构：

[1] Platypus Technol, Madison, WI 53705 USA

[2] Kent State Univ, Dept Phys, Kent, OH 44240 USA

[3] Natl Sci Fdn, Div Mat Res, Arlington, VA 22230 USA

来源：

LIQUID CRYSTALS | 2008年 / 35卷 / 02期

基金：

美国国家科学基金会;

关键词：

X-ray diffraction; uniaxial-biaxial phase transition; biaxial nematic phase; bent-core mesogen;

D O I：

10.1080/02678290701817326

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

X-ray diffraction patterns for the uniaxial and biaxial nematic phases exhibited by rigid bent-core mesogens were calculated using a simple model for the molecular form factor and a modified Lorentzian structure factor. The X-ray diffraction patterns depend strongly on the extent of the alignment of the molecular axes as well as the orientation of molecular planes. The X-ray diffraction can be unequivocally used to identify the biaxial nematic phase, study the uniaxial-biaxial phase transition, and estimate the order parameters of the nematic phase.

引用

页码：109 / 118

页数：10

共 16 条

[1] Biaxial nematic phase in bent-core thermotropic mesogens [J].