Rotational self-diffusion coefficients in dipolar organic liquid crystal film on the solid surfaces

2008 ◽  
Vol 458 (1-3) ◽  
pp. 143-146 ◽  
Author(s):  
A.V. Zakharov ◽  
Dai Taguchi ◽  
Mitsumasa Iwamoto
Keyword(s):  
Liquid Crystal ◽  
Diffusion Coefficients ◽  
Organic Liquid ◽  
Solid Surfaces ◽  
Self Diffusion ◽  
Crystal Film

Pressure-induced insulator–conductor transition in a photoconducting organic liquid-crystal film

Nature ◽  
2002 ◽  
Vol 418 (6894) ◽  
pp. 162-164 ◽  
Author(s):  
Chong-yang Liu ◽  
Allen J. Bard
Keyword(s):  
Liquid Crystal ◽  
Organic Liquid ◽  
Crystal Film

Thickness Control of Liquid Crystal Film in a Step Bearing by Electric Field Under Dynamic Loading Condition

Tribology ◽  
2005 ◽  
Author(s):  
Yoshiki Matsumura ◽  
Toshihiko Shiraishi ◽  
Shin Morishita
Keyword(s):  
Liquid Crystal ◽  
Electric Field ◽  
Pid Controller ◽  
Molecular Orientation ◽  
Organic Liquid ◽  
Orientational Order ◽  
Earthquake Excitation ◽  
Crystal Film ◽  
Dynamic Loading Condition ◽  
Viscosity Variation

This paper describes the viscosity variation of a liquid crystal under electric field, and its application to a controllable step bearing. Liquid crystal is known as a homogeneous organic liquid characterized by the long-range order of its molecular orientation. When an electric field is applied to a liquid crystal film as lubricant, the orientational order of molecules becomes parallel to the applied field, which causes apparent viscosity variation. In this paper, a controllable step bearing system was constructed and its dynamic characteristics were studied. When a step load, sinusoidal or earthquake excitation was applied to the bearing pad, the film thickness was successfully controlled to the appointed value by a conventional PID controller. The response frequency was also studied in the experiment.

Effective anchoring energy of an organic liquid crystal film on a solid surface

2011 ◽  
Vol 502 (4-6) ◽  
pp. 202-206 ◽  
Author(s):  
Mitsumasa Iwamoto ◽  
Silvano Romano ◽  
A.V. Zakharov
Keyword(s):  
Liquid Crystal ◽  
Solid Surface ◽  
Organic Liquid ◽  
Crystal Film ◽  
Anchoring Energy

scholarly journals Theoretical Modelling of Ion Exchange Processes in Glass: Advances and Challenges

2021 ◽  
Vol 11 (11) ◽  
pp. 5070
Author(s):  
Xesús Prieto-Blanco ◽  
Carlos Montero-Orille
Keyword(s):  
Ion Exchange ◽  
Diffusion Coefficients ◽  
Molten Salts ◽  
Theoretical Modelling ◽  
Copper Films ◽  
Theoretical Frameworks ◽  
Self Diffusion ◽  
Exchange Processes ◽  
The One ◽  
Made In

In the last few years, some advances have been made in the theoretical modelling of ion exchange processes in glass. On the one hand, the equations that describe the evolution of the cation concentration were rewritten in a more rigorous manner. This was made into two theoretical frameworks. In the first one, the self-diffusion coefficients were assumed to be constant, whereas, in the second one, a more realistic cation behaviour was considered by taking into account the so-called mixed ion effect. Along with these equations, the boundary conditions for the usual ion exchange processes from molten salts, silver and copper films and metallic cathodes were accordingly established. On the other hand, the modelling of some ion exchange processes that have attracted a great deal of attention in recent years, including glass poling, electro-diffusion of multivalent metals and the formation/dissolution of silver nanoparticles, has been addressed. In such processes, the usual approximations that are made in ion exchange modelling are not always valid. An overview of the progress made and the remaining challenges in the modelling of these unique processes is provided at the end of this review.

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