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

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...

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Bibliographic Details
Published in:Liquid crystals 2008-02, Vol.35 (2), p.109-118
Main Authors: Acharya, Bharat R., Kang, Shin-Woong, Kumar, Satyendra
Format: Article
Language:English
Subjects:
bent-core mesogen
biaxial nematic phase
uniaxial-biaxial phase transition
X-ray diffraction
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Summary: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.
ISSN:0267-8292
1366-5855
DOI:10.1080/02678290701817326