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2011 | 120 | 6 | 1037-1042
Article title

Determination of Orientational Order Parameters of Two Tri-Component Mixtures from Optical Birefringence and X-Ray Diffraction Measurements

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EN
Abstracts
EN
Two tri-component mixtures as base mixtures for vertically aligned mode LCD's were prepared. The eutectic compositions were theoretically estimated and experimentally verified from differential scanning calorimetry studies. A room temperature nematic mixture with fairly broad operating range emerged from each of the tri-component mixtures. The optical birefringence of these mixtures at the eutectic composition was measured as a function of temperature. X-ray diffraction measurements were done on these mixtures to obtain the orientational order parameters as a function of temperature. The order parameter values were also determined from birefringence measurements and the results were compared with mean field theory. Structural parameters like intermolecular distance and apparent molecular length have also been determined.
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EN
Contributors
author
  • Department of Physics, Siliguri Institute of Technology, Siliguri, Darjeeling - 734 009, India
author
  • Department of Physics, Siliguri Institute of Technology, Siliguri, Darjeeling - 734 009, India
author
  • Department of Physics, Siliguri Institute of Technology, Siliguri, Darjeeling - 734 009, India
author
  • Department of Physics, University of North Bengal, Darjeeling - 734 013, India
author
  • Department of Advanced Technologies and Chemistry, Military University of Technology, 00-908 Warsaw, Poland
References
  • 1. C.Y. Xiang, X.W. Sun, X.J. Yin, J. Appl. Phys. 37, 994 (2004)
  • 2. D.S. Seo, Liq. Cryst. 27, 1147 (2000)
  • 3. S. Gauza, M. Jiao, S.-T. Wu, P. Kula, R. Dabrowski, X. Liang, Liq. Cryst. 35, 1401 (2008)
  • 4. M. Schadt, W. Helfrich, Appl. Phys. Lett. 18, 127 (1971)
  • 5. P. Alvelda, M. Bolotski, I.L. Brown, Proc. SPIE 3955, 109 (2000)
  • 6. H.C. Huang, B.L. Zhang, H.S. Kwok, P.W. Cheng, Y.C. Chen, Soc. Info. Disp. Symp. Digest 36, 880 (2005)
  • 7. B.L. Zhang, H.S. Kwok, H.C. Huang, J. Appl. Phys. 98, 123103 (2005)
  • 8. T.J. Scheffer, J. Nehring, Appl. Phys. Lett. 45, 1021 (1984)
  • 9. M. Oh-e, M. Ohta, S. Aratani, K. Kondo, in: 15th International Display Research Conference, Asia Display, 1995, p. 577
  • 10. M. Oh-e, K. Kondo, Appl. Phys. Lett. 69, 623 (1996)
  • 11. V. Reiffenrath, J. Krause, H.J. Plach, G. Weber, Liq. Cryst. 5, 159 (1989)
  • 12. P. Kirsch, M. Bremer, Angew. Chem. 112, 4384 (2000)
  • 13. P. Kirsch, M. Bremer, Angew. Chem., Int. Ed. 39, 4216 (2000)
  • 14. D. Pauluth, K. Tarumi, J. Mater. Chem. 14, 1219 (2004)
  • 15. B. Bahadur, Liquid Crystals: Applications and Uses, Vol. I, World Sci., Singapore 1991
  • 16. P.G. de Gennes, J. Prost, The Physics of Liquid Crystals, Clarendon Press, Oxford 1993
  • 17. S. Charandrasekhar, Liquid Crystals, Cambridge University Press, Cambridge 1977
  • 18. W. Maier, A. Saupe, Z. Naturforsch. 15a, 287 (1960)
  • 19. E.C.H. Hsu, J.F. Johnson, Mol. Cryst. Liq. Cryst. 20, 177 (1973)
  • 20. I. Schröder, Z. Phys. Chem. 11, 449 (1893)
  • 21. G. Sarkar, M.K. Das, R. Paul, B. Das, W. Weissflog, Phase Transit. 82, 433 (2009)
  • 22. I. Haller, Prog. Solid State Chem. 10, 103 (1975)
  • 23. H.P. Klug, L.E. Alexander, X-ray Diffraction Procedure for Polycrystalline and Amorphous Materials, Wiley, New York 1974, p. 114, 473
  • 24. B. Bhattacharjee, S. Paul, R. Paul, Mol. Phys. 44, 1391 (1981)
  • 25. A.J. Leadbetter, P.G. Wrighton, J. Phys. (Paris) 40, C3-234 (1979)
Document Type
Publication order reference
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YADDA identifier
bwmeta1.element.bwnjournal-article-appv120n610kz
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