Digitally controlled high-precision thermostat for X-ray investigations on lyotropic and thermotropic liquid crystals

1999 ◽  
Vol 277 (5) ◽  
pp. 494-498 ◽  
Author(s):  
A. Hieke ◽  
H.-D. Dörfler
Keyword(s):  
Liquid Crystals ◽  
High Precision ◽  
X Ray ◽  
Thermotropic Liquid Crystals ◽  
Digitally Controlled ◽  
Precision Thermostat

Phase Transformation of Swollen Thermotropic Liquid Crystals Studied by X-Ray and2H-NMR Measurements

2009 ◽  
Vol 509 (1) ◽  
pp. 1/[743]-8/[750] ◽  
Author(s):  
Kazuyuki Hiraoka ◽  
Atsushi Kato ◽  
Hideaki Hattori ◽  
Yoshinori Sasaki ◽  
Yoshihiro Omata ◽  
...  
Keyword(s):  
Phase Transformation ◽  
Liquid Crystals ◽  
X Ray ◽  
Thermotropic Liquid Crystals

Role of Molecular Structure on X-ray Diffraction in Uniaxial and Biaxial Phases of Thermotropic Liquid Crystals†

2009 ◽  
Vol 113 (12) ◽  
pp. 3845-3852 ◽  
Author(s):  
Bharat R. Acharya ◽  
Shin-Woong Kang ◽  
Veena Prasad ◽  
Satyendra Kumar
Keyword(s):  
Molecular Structure ◽  
Liquid Crystals ◽  
X Ray Diffraction ◽  
X Ray ◽  
Thermotropic Liquid Crystals

Automatic measurement of SAED patterns from asbestos minerals

1988 ◽  
Vol 46 ◽  
pp. 846-847
Author(s):  
J. C. Russ ◽  
T. Taguchi ◽  
P. M. Peters ◽  
E. Chatfield ◽  
J. C. Russ ◽  
...  
Keyword(s):  
Diffraction Pattern ◽  
High Precision ◽  
Diffraction Data ◽  
Automatic Measurement ◽  
Automatic Method ◽  
Important Method ◽  
X Ray ◽  
Integrated Intensity ◽  
Asbestiform Minerals ◽  
True Center

Conventional SAD patterns as obtained in the TEM present difficulties for identification of materials such as asbestiform minerals, although diffraction data is considered to be an important method for making this purpose. The preferred orientation of the fibers and the spotty patterns that are obtained do not readily lend themselves to measurement of the integrated intensity values for each d-spacing, and even the d-spacings may be hard to determine precisely because the true center location for the broken rings requires estimation. We have implemented an automatic method for diffraction pattern measurement to overcome these problems. It automatically locates the center of patterns with high precision, measures the radius of each ring of spots in the pattern, and integrates the density of spots in that ring. The resulting spectrum of intensity vs. radius is then used just as a conventional X-ray diffractometer scan would be, to locate peaks and produce a list of d,I values suitable for search/match comparison to known or expected phases.

Biforked mesogens : a new type of thermotropic liquid crystals

1986 ◽  
Vol 47 (4) ◽  
pp. 553-557 ◽  
Author(s):  
Nguyen Huu Tinh ◽  
C. Destrade ◽  
A.M. Levelut ◽  
J. Malthete
Keyword(s):  
Liquid Crystals ◽  
Thermotropic Liquid Crystals ◽  
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