Dielectric Relaxation Studies on Molecular Motion of Poly(fluoroalkyl α-substituted acrylate)s and Compass Motion Model for Internal Motion of the Fluoroalkyl Side Chain

1999 ◽  
Vol 32 (5) ◽  
pp. 1651-1660 ◽  
Author(s):  
Kenji Tadano ◽  
Yoshito Tanaka ◽  
Tetsuo Shimizu ◽  
Shinichi Yano
Keyword(s):  
Dielectric Relaxation ◽  
Molecular Motion ◽  
Internal Motion ◽  
Side Chain ◽  
Motion Model ◽  
Relaxation Studies

Dielectric Relaxation Studies of Silver Nanoparticles dispersed Liquid Crystal

2015 ◽  
Vol 8 (3) ◽  
pp. 2176-2188 ◽  
Author(s):  
Keisham Nanao Singh
Keyword(s):  
Activation Energy ◽  
Silver Nanoparticles ◽  
Liquid Crystal ◽  
Dielectric Relaxation ◽  
Relaxation Process ◽  
Relaxation Times ◽  
Low Frequency ◽  
Bulk Liquid ◽  
Molecular Rearrangement ◽  
Relaxation Studies

This article reports on the Dielectric Relaxation Studies of two Liquid Crystalline compounds - 7O.4 and 7O.6 - doped with dodecanethiol capped Silver Nanoparticles. The liquid crystal molecules are aligned homeotropically using CTAB. The low frequency relaxation process occurring above 1 MHz is fitted to Cole-Cole formula using the software Dielectric Spectra fit. The effect of the Silver Nanoparticles on the molecular dipole dynamics are discussed in terms of the fitted relaxation times, Cole-Cole distribution parameter and activation energy. The study indicate a local molecular rearrangement of the liquid crystal molecules without affecting the order of the bulk liquid crystal molecules but these local molecules surrounding the Silver Nanoparticles do not contribute to the relaxation process in the studied frequency range. The observed effect on activation energy suggests a change in interaction between the nanoparticles/liquid crystal molecules.

Dielectric Relaxation Studies by Time Domain Spectroscopy

Nature ◽  
1970 ◽  
Vol 228 (5270) ◽  
pp. 456-457 ◽  
Author(s):  
A. SUGGETT ◽  
P. A. MACKNESS ◽  
M. J. TAIT ◽  
H. W. LOEB ◽  
G. M. YOUNG
Keyword(s):  
Dielectric Relaxation ◽  
Time Domain ◽  
Time Domain Spectroscopy ◽  
Relaxation Studies
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