TOPS of Santa Clara Valley (formerly RESEED)
Question
Asked 8th May, 2015
Could someone point me to models of ions in liquid crystals?
I'm trying to look for models on the contribution/effect of ions in liquid crystals. In particular, I would like to know how the effect of flowing ions can be coupled with the director/orientational field.
Can someone point me in the right direction?
Most recent answer
The movement of ions in liquid crystals goes back to 1966. I was a member of the team that built the first liquid crystal display at RCA Laboratories' David Sarnoff Research Center in Princeton, New Jersey. That display used a concept we called "dynamic scattering." We doped the liquid crystal with an ionic compound called cetyltrimethyammonium bromide, which was soluble in the LC. It served two purposes: one was to cause the long-axis alignment of the anisotropic LC molecules perpendicular to the electrode surface (homogenous alignment) and the second was to provide a source of ions which created turbulence in the liquid when an electric files was applied. This caused the cell to appear clear in the OFF state and opaque in the ON state. The details of this process are presented in the following papers:
Heilmeier, G.H., Zanoni, L.A. and Barton, L.A., “Dynamic Scattering in Nematic Liquid Crystals,” Appl. Phys. Lett., 13, 46 (1968); Proc. IEEE, 56, 1162 (1968). Heilmeier, G.H. and Zanoni, L.A., “Electro-optical Devices,” U.S. Patent 3,499,112 (1970), applied for March 31, 1967.
9. Goldmacher, J.E. and Castellano, J.A., “Electro-optical Compositions and Devices,” U.S. Patent 3,540,796 (1970), applied for June 9, 1966
I hope this is helpful.
Joe
1 Recommendation
All Answers (6)
Haitong Investment Bank, S.A, Lisbon, Portugal
Thanks. The article seems interesting. I'll read it in more detail, but at first glance it seems purely experimental and without the modelling which I'm interested on.
Maybe the article has the necessary "bread crumbs" that will lead to what I'm after ...
TOPS of Santa Clara Valley (formerly RESEED)
The movement of ions in liquid crystals goes back to 1966. I was a member of the team that built the first liquid crystal display at RCA Laboratories' David Sarnoff Research Center in Princeton, New Jersey. That display used a concept we called "dynamic scattering." We doped the liquid crystal with an ionic compound called cetyltrimethyammonium bromide, which was soluble in the LC. It served two purposes: one was to cause the long-axis alignment of the anisotropic LC molecules perpendicular to the electrode surface (homogenous alignment) and the second was to provide a source of ions which created turbulence in the liquid when an electric files was applied. This caused the cell to appear clear in the OFF state and opaque in the ON state. The details of this process are presented in the following papers:
Heilmeier, G.H., Zanoni, L.A. and Barton, L.A., “Dynamic Scattering in Nematic Liquid Crystals,” Appl. Phys. Lett., 13, 46 (1968); Proc. IEEE, 56, 1162 (1968). Heilmeier, G.H. and Zanoni, L.A., “Electro-optical Devices,” U.S. Patent 3,499,112 (1970), applied for March 31, 1967.
9. Goldmacher, J.E. and Castellano, J.A., “Electro-optical Compositions and Devices,” U.S. Patent 3,540,796 (1970), applied for June 9, 1966
I hope this is helpful.
Joe
1 Recommendation
Similar questions and discussions
Related Publications
The present state of the Generalized Molecular Asymmetry (GMA) model in liquid crystal physics is reviewed. Emphasis is made upon the recent application of this model for description of lyotropic and biological liquid crys- tal structures. The capacity of the model to provide a general framework for all types of liquid crystals is revealed.
Liquid crystal science can look back on a century of impressive fundamental and technological accomplishment. The next millennium greets us not only with a new set of scientific challenges but also with the need to define ourselves in the broader scientific arena. This talk will look at some of the research areas where we are likely to see future g...
We report large scale simulations of the blue phases of cholesteric liquid crystals. Our results suggest a structure for blue phase III, the blue fog, which has been the subject of a long debate in liquid crystal physics. We propose that blue phase III is an amorphous network of disclination lines, which is thermodynamically and kinetically stabili...