Zobrazeno 1 - 10
of 41
pro vyhledávání: '"J. D. Margerum"'
Autor:
Brian P. Grady, W. B. Genetti, Elena Sherman, Anna M. Lackner, J. D. Margerum, K. C. Lim, B. M. Fung, Mei-Sing Ho
Publikováno v:
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals. 302:187-197
A new liquid crystal monomer, the diacrylate of a bis phenyi diazene, was synthesized. It was polymerized to form both unoriented and oriented polymer solids–the latter in the presence of a magnetic field. The millimeter wave birefringence was meas
Publikováno v:
Liquid Crystals. 19:871-881
The synthesis of unsymmetrical phenyl-1,2,4,5-tetrazines containing a cyano group either on the phenyl ring (1a) or the tetrazine ring (11a, 11b) has been accomplished by the introduction of the cyano group after formation of the tetrazine ring. The
Autor:
Chain-Shu Hsu, J. D. Margerum, Mei-Sing Ho, Shyu-Mou Chen, B. M. Fung, Shin-Tson Wu, K. T. Tsai
Publikováno v:
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals. 261:79-86
Several liquid crystal dyes and fluorinated compounds with high birefringence are synthesized and their properties evaluated. These polar compounds are useful dopants for enhancing the dielectric anisotropy of the dialkyl diphenyl-diacetylene host.
Autor:
Mary E. Neubert, J. D. Margerum, S. S. Keast, S. J. Hummel, Anna M. Lackner, J. C. Bhatt, Elena Sherman
Publikováno v:
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals. 260:287-300
A number of azo-anil dyes of the type with with Y=CN or NO2 and R,R′=Me, Me; Me,C6H13; Et,Pr and C6H13,C6,H13 were synthesized by reactions of the aminosubstituted nitrosoamine with phenylene diamine followed by condensation of the resulting anilin
Publikováno v:
Liquid Crystals. 14:351-359
Microtubule particles and metal-coated microtubules were dispersed in various host liquid crystal mixtures. Dispersion effects were evaluated as a function of liquid crystal type, viscosity, dielectric anisotropy and surface interaction. Experimental
Publikováno v:
Liquid Crystals. 14:345-350
Polymer dispersed liquid crystal (PDLC) films are prepared by ultraviolet curing of monomer/liquid crystal solutions with a copolymerizable photoinitiator instead of a traditional photoinitiator. As a consequence of this method of preparation, there
Publikováno v:
Molecular Crystals and Liquid Crystals. 199:37-46
A new technique for tilted-perpendicular alignment (TPA) of liquid crystals on surfaces greatly improved the photostability of the photoactivated liquid crystal light valves (LCLVs) with negative dielectric anisotropy liquid crystals. The operation o
Publikováno v:
Applied Physics Letters. 64:1204-1206
Infrared transmission of 25 liquid crystal compounds was evaluated. Based on these results, a liquid crystal mixture consisting of fluoro and dialkyl diphenyl‐diacetylene homologs was developed for CO2 laser application. This mixture exhibits a wid
Publikováno v:
Applied Physics Letters. 62:1065-1067
The birefringence of two common nematic liquid crystals were measured in the millimeter wave range, and were found to be in the range of 0.19–0.22 at room temperature. Using liquid crystal electro‐ and magneto‐optical effects, we present the fi
Autor:
J. D. Margerum, Larry R. Dalton, Shu-Hua Lung, Chain-Shu Hsu, Hsiang-Hui B. Meng, Shin-Tson Wu
Publikováno v:
Applied Physics Letters. 61:630-632
Thirty new asymmetric diphenyl‐diacetylene (PTTP) liquid‐crystal homologs are synthesized and their physical properties characterized. In addition to the observed high birefringence and relatively low viscosity, several dialkyl PTTP homologs also