scholarly journals Order parameters, orientational distribution functions and heliconical tilt angles of oligomeric liquid crystals

2019 ◽  
Vol 21 (13) ◽  
pp. 6839-6843 ◽  
Author(s):  
Richard J. Mandle ◽  
John W. Goodby
Keyword(s):  
Liquid Crystals ◽  
Orientational Order ◽  
Helical Structure ◽  
Order Parameters ◽  
Distribution Functions ◽  
X Ray ◽  
X Ray Scattering ◽  
Orientational Distribution ◽  
Pitch Length ◽  
Ray Scattering

Twist-bend (TB) phases possess a local helical structure with a pitch length of a few nanometers. X-ray scattering experiments on aligned samples of dimeric and oligomeric materials allows the orientational order parameters, orientational distribution functions and heliconical tilt angles to be calculated.

scholarly journals Considerations in the determination of orientational order parameters from X-ray scattering experiments

2018 ◽  
Vol 46 (1) ◽  
pp. 11-24 ◽  
Author(s):  
Mark T. Sims ◽  
Laurence C. Abbott ◽  
Robert M. Richardson ◽  
John W. Goodby ◽  
John N. Moore
Keyword(s):  
Orientational Order ◽  
Order Parameters ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering

X-ray scattering from Co0.83[Pt(C2O4]2]·6H2O: A system with two coupled order parameters

1979 ◽  
Vol 1 (1) ◽  
pp. 35-42 ◽  
Author(s):  
Aleksander Braude ◽  
Asger Lindegaard-Andersen ◽  
Kim Carneiro ◽  
Allan E. Underhill
Keyword(s):  
Order Parameters ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering

scholarly journals Evaluation of 4-alkoxy-4′-nitrobiphenyl liquid crystals for use in next generation scattering LCDs

RSC Advances ◽  
2017 ◽  
Vol 7 (64) ◽  
pp. 40480-40485 ◽  
Author(s):  
Richard J. Mandle ◽  
Stephen J. Cowling ◽  
John W. Goodby
Keyword(s):  
Liquid Crystals ◽  
Electric Field ◽  
Applied Electric Field ◽  
Field Studies ◽  
Next Generation ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering

A combination of microscopy, X-ray scattering, calorimetry and applied electric field studies demonstrates the 4-alkoxy-4′-nitrobiphenyls are potentially of use for next generation, backlight free scattering mode LCD devices.

scholarly journals Order Parameters, Orientational Distribution Functions and Heliconical Tilt Angles of Oligomeric Liquid Crystals

2019 ◽  
Author(s):  
Richard Mandle ◽  
John W. Goodby
Keyword(s):  
Phase Transition ◽  
Liquid Crystals ◽  
Tilt Angle ◽  
Order Parameter ◽  
Nematic Phase ◽  
Liquid Crystalline ◽  
Thermal Evolution ◽  
Order Parameters ◽  
Distribution Functions ◽  
Orientational Distribution

We compare the order parameters, orientational distribution functions (ODF) and heliconical tilt angles of the TB phase exhibited by a liquid-crystalline dimer (CB7CB) to a tetramer (O47) and hexamer (O67) by SAXS/WAXS. Following the N-TB phase transition we find that all order parameters decrease, and while 〈P2 〉 remains positive 〈P4 〉 becomes negative. For all three materials the order parameter 〈P6 〉 is near zero in both phases. The ODF is sugarloaf-like in the nematic phase and volcano-like in the TB phase, allowing us to estimate the heliconical tilt angle of each material and its thermal evolution. The heliconical tilt angle appears to be largely independent of the material studied despite the differing number of mesogenic units.

scholarly journals Optical and X-ray scattering studies of the electric field-induced orientational order in colloidal suspensions of pigment nanorods

2018 ◽  
Vol 267 ◽  
pp. 286-296 ◽  
Author(s):  
Oleksandr Buluy ◽  
Natalie Aryasova ◽  
Oleksandr Tereshchenko ◽  
Yuriy Kurioz ◽  
Vassili Nazarenko ◽  
...  
Keyword(s):  
Electric Field ◽  
Orientational Order ◽  
Colloidal Suspensions ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering

Static structure and dynamical behavior of colloidal liquid crystals consisting of hydroxyapatite-based nanorod hybrids

Soft Matter ◽  
2019 ◽  
Vol 15 (16) ◽  
pp. 3315-3322 ◽  
Author(s):  
Taiki Hoshino ◽  
Masanari Nakayama ◽  
So Fujinami ◽  
Tomotaka Nakatani ◽  
Yoshiki Kohmura ◽  
...  
Keyword(s):  
Liquid Crystals ◽  
Liquid Crystalline ◽  
Dynamical Behavior ◽  
Colloidal Dispersions ◽  
Static Structure ◽  
X Ray ◽  
Structure And Dynamics ◽  
X Ray Scattering ◽  
Ray Scattering

The static structure and dynamics of liquid-crystalline colloidal dispersions of hydroxyapatite nanorods are studied using X-ray scattering techniques.

Structural Study of a Decagonal Al75Fe15Ni10 Alloy by Anomalous X-ray Scattering (AXS) Method

1991 ◽  
Vol 46 (7) ◽  
pp. 605-608 ◽  
Author(s):  
E. Matsubara ◽  
Y. Waseda ◽  
A. P. Tsai ◽  
A. Inoue ◽  
T. Masumoto
Keyword(s):  
Structural Study ◽  
Radial Distribution ◽  
Distribution Functions ◽  
Radial Distribution Functions ◽  
X Ray Diffraction ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering

A structural study of an as-quenched decagonal Al75Fe15Ni10 alloy has been carried out by anomalous x-ray scattering (AXS) as well as ordinary x-ray diffraction. The environmental radial distribution functions (RDFs) for Fe and Ni determined by the AXS measurements turned out to resemble each other and to be similar to the ordinary RDF obtained by ordinary x-ray diffraction. These results clearly show that the Ni and Fe atoms are homogeneously distributed and occupy the same sites in the decagonal structure of Al75Fe15Ni10.

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