Solitons, defect diffusion, and dielectric relaxation of polymers

1980 ◽  
Vol 73 (8) ◽  
pp. 4022-4025 ◽  
Author(s):  
James L. Skinner ◽  
Peter G. Wolynes
Keyword(s):  
Dielectric Relaxation ◽  
Defect Diffusion

Defect Diffusion Models in NMR and Dielectric Relaxation

1978 ◽  
Vol 33 (11) ◽  
pp. 1294-1306 ◽  
Author(s):  
Rainer Kimmich ◽  
Gerhard Voigt
Keyword(s):  
Diffusion Process ◽  
Dielectric Relaxation ◽  
Diffusion Models ◽  
Defect Concentration ◽  
Relaxation Behaviour ◽  
Defect Diffusion ◽  
Rotational Isomers ◽  
Mean Lifetime ◽  
The Mean

The effect of diffusing defects such as vacancies, displacements, torsions, and rotational isomers on the nmr and dielectric relaxation behaviour is treated under various aspects. The influences of the dimensionality of the diffusion process, of the mutual hindrance, of the defect concentration, of the defect length and of the mean lifetime are derived and discussed.

Consequences of Restricted Defect Diffusion on NMR and Dielectric Relaxation

1976 ◽  
Vol 31 (7) ◽  
pp. 693-696 ◽  
Author(s):  
R. Kimmich
Keyword(s):  
Diffusion Process ◽  
Dielectric Relaxation ◽  
Finite Length ◽  
Defect Diffusion ◽  
One Dimensional ◽  
Limited Diffusion ◽  
Reflecting Barriers ◽  
Nuclear Magnetic

Abstract Nuclear magnetic and dielectric relaxation formulas are given for a model of limited diffusion of defects. The limitation is introduced by the assumption of fixed reflecting barriers on both sides of the defect. The diffusion process is assumed to be one-dimensional and continuous. The effect of the finite length of the defects is included in the presented treatment.

Influence of long-term defect diffusion on HgCdTe electronic structure

2004 ◽  
Vol 27 (1-3) ◽  
pp. 403-406
Author(s):  
M. Pociask ◽  
B. Pukowska ◽  
A. Kisiel ◽  
E. M. Sheregii ◽  
N. N. Berchenko
Keyword(s):  
Electronic Structure ◽  
Defect Diffusion

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.

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