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Home»Articles»Electro-Optical Phase Transition Studies ofChiral SmecticPhase of Nematic and CholestericMaterials

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Asian Journal of Science and Applied Technology (AJSAT)

Editor Dr. Balaji Ramachandran
Print ISSN : 2249 - 0698
Frequency : Half-yearly

Electro-Optical Phase Transition Studies ofChiral SmecticPhase of Nematic and CholestericMaterials

Author : T.N. Govindaiah, B.N. Ramakrishna and T.S.Shashikumar
Volume 7 No.2 July-December 2018 pp 24-26

Abstract

In the present work, our investigation is to study the electro-optical properties of the binary mixture of cholesteric and nematic compounds, namely, cholesteryl chloride (ChCl) and n-(4-n-butoxy benzylidene-4-n octylaniline (4O.8), which exhibits a very interesting liquid crystalline cholesteric and induced chiral smectic phases like SmA, SmC∗, SmC, and SmB phases sequentially when the specimen cooled from isotropic phase. Transmittance and electro-optical phase transition studies have also been discussed.

Keywords

Phase Transition, Chiral Smectic Phase, Transmittance Electro-Optical Studies

Full Text:

References

[1] P. G. DeGennes and J.Prost, “The Physics of Liquid Crystals”, OxfordScience Publications, New York, ed. 2, 1993.
[2] P. M. Chaikin and T. C. Lubensky, “Principles of Condensed Matter Physics”, Cambridge University Press Cambridge, 1995.
[3] M. Iwamoto,C. X. WuandZ. C. Ou-Yang,“Separation of chiral phases by compression: kinetic localization of the enantiomers in a monolayer of racemic amphiphiles viewed as mixing cholesteric liquid crystalsChem. Phys. Lett.,Vol. 285,pp. 306-312, 1998.
[4] F. ZhangandD. K. Yang,“Temperature dependence of pitch and twist elastic constant in a cholesterictosmectic A phase transition”,Liq. Cryst.,Vol. 29, pp. 1497-1501, 2002.
[5] T. N. Govindaiah,“Temperature-dependent Anisotropic Nano-Molecular Orientations of Liquid Crystalline Materials”, Mol. Cyst. Liq. Cryst., Vol. 626, pp. 151-159, 2016.
[6] R. Williams,“Liquid Crystals in an Electric Field”, Nature, Vol. 199, pp. 273-274, 1963.
[7] D.DemusandC. Richter,Textures of Liquid Crystals,VerlagChemie:Weinheim,NewYork, 1978.
[8] Nagappa, D. RevanasiddaiahandD. Krishnamurti,“Optical Behaviour of MixturesofNematic and CholestericCompounds”, Mol. Cryst. Liq. Cryst.,Vol. 101, No. 1-2, pp. 103-127, 1983.
[9] T. N. Govindaiah,“Phase Diagram Involving the Thermal Stability of TGB and Induced Smectic Phases in Binary Mixture of Thermotropic Liquid Crystals”, Mol. Cryst.Liq. Cryst.,Vol. 626, pp. 115-123, 2016.
[10] A. J. Slaney andJ. W. Goodby, “The effect of molecular chirality on the incidence oftwistedsmectic A phases”, Liq. Cryst.,Vol. 9, pp. 849-861,1991.
[11] M. Marthandappa,Nagappa, R. SomashekarandK. M. LokanathaRai,Phys.Stat. Sol.,Vol.129, pp. 389-398,1992.
[12] P. G. DeGennes, “The Physics of Liquid Crystals”, Clarendon Press: Oxford, U.K. pp.239, 1991.
[13] N. A. VazandG. P. Montgomery, “Refractive indices of polymer‐dispersed liquid‐crystal film materials: Epoxy‐based systems”, J. Appl. Phys., Vol. 62, pp. 3161, 1987.
[14] T. N. Govindaiah,“Studies on Anisotropic Molecular Orientation and Mesophase Stability in a Ternary Mixture of Liquid Crystalline Materials”,Mol. Cryst. Liq. Cryst.,Vol. 626, pp. 141-150, 2016.
[15] P. J. Collings and M. Hird,“Introduction to Liquid Crystals: Physics and Chemistry”, Taylor and Francis, London, 1997.
[16] W.Helfrich,“Electric Alignment of Liquid Crystal”, Mol. Cryst. Liq. Cryst.,Vol. 21, No. 3-4, pp. 187-209, 1973.
[17] D. KrishnamurtiandD. Revannasiddaiah,“Optical Studies on Williams Domains”, Mol.Cryst.Liq.Cryst.,Vol. 55, No. 1, pp. 33-46, 1979.
[18] S. Kai, K. Yamaguchiand andK. Hirakawa,“Observation of Flow Figures in Nematic Liquid Crystal MBBA”,Japan. J. Appl. Phys.,Vol. 14, No. 11, pp. 1385,1975.

AJSAT is covering all aspects of Science and Applied Technology areas. Topics include, but are not limited to:

Chemistry
Physics
Astronomy
Earth Science
Environmental Science
Biology
Computer Science
Mathematics
Statistics
Systems Science

In the present work, our investigation is to study the electro-optical properties of the binary mixture of cholesteric and nematic compounds, namely, cholesteryl chloride (ChCl) and n-(4-n-butoxy benzylidene-4-n octylaniline (4O.8), which exhibits a very interesting liquid crystalline cholesteric and induced chiral smectic phases like SmA, SmC∗, SmC, and SmB phases sequentially when the specimen cooled from isotropic phase. Transmittance and electro-optical phase transition studies have also been discussed.

Editor-in-Chief
Dr. Balaji Ramachandran
Department of Applied Sciences, Nicholls State University, Louisiana, United States
[email protected]
Editorial Advisory Board
Dr. Maamar Benkraouda
Department of Physics, United Arab Emirates University, UAE
[email protected]
Dr. Rasheed Al Hammadi
Department of Biology, United Arab Emirates University, UAE
[email protected]
Dr. Dimitrios P. Nikolelis
Department of Chemistry, University of Athens, Greece
[email protected]
Dr. Fauziah Binti Shahul Hamid
Institute of Biological Sciences, University of Malaya, Malaysia
[email protected]
Dr. Karni S Moshal
Department of Medicine, Alpert Medical School of Brown University, USA
[email protected]
Dr. Koh You Beng
Institute of Mathematical Sciences, University of Malaya, Malaysia
[email protected]
Dr. Lim Sok Li
Institute of Mathematical Sciences, University of Malaya, Malaysia
[email protected]
Dr. Ramesh Kasi
Department of Physics, University of Malaya, Malaysia
[email protected]
Dr. Jasmine Elanie Binti Khairat
Institute of Biological Sciences, University of Malaya, Malaysia
[email protected]
Dr. Nur Airina Binti Muhamad
Institute of Biological Sciences, University of Malaya, Malaysia
[email protected]
Dr. Amizah Malip
Department of Applied Mathematics, University of Malaya, Malaysia
[email protected]
Dr. Azzuliani Binti Supangat
Department of Physics, University of Malaya, Malaysia
[email protected]
Prof. Mohamed Toutounji
Professor, Department of Chemistry, United Arab Emirates University, UAE
[email protected]
Dr. Mohd Azmi Haron
Institute of Mathematical Sciences, University of Malaya, Malaysia
[email protected]
Prof. Noordini Mohamad Salleh
Department of Chemistry, University of Malaya, Malaysia
[email protected]
Dr. Ibrahim Bin Mohamed
Institute of Mathematical Sciences, University of Malaya, Malaysia
[email protected]
Dr. Halijah Ibrahim
Institute of Biological Sciences, University of Malaya, Malaysia
[email protected]
Dr. S. Chandra Kishore
Assistant Professor, University of Information Science and Technology,
“St. Paul The Apostle”, Macedonia, Greece
[email protected]
Dr. Salah Nasri
Department of Physics, United Arab Emirates University, UAE
[email protected]
Dr. Dharini Pathmanathan
Institute of Mathematical Sciences, University of Malaya, Malaysia
[email protected]

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    Editorial Note

    Editorial Dr. Balaji Ramachandran

    Editor-in-Chief
    Dr. Balaji Ramachandran
    Department of Applied Sciences, Nicholls State University, Louisiana, United States
    [email protected]
    Editorial Advisory Board
    Dr. Maamar Benkraouda
    Department of Physics, United Arab Emirates University, UAE
    [email protected]
    Dr. Rasheed Al Hammadi
    Department of Biology, United Arab Emirates University, UAE
    [email protected]
    Dr. Dimitrios P. Nikolelis
    Department of Chemistry, University of Athens, Greece
    [email protected]
    Dr. Fauziah Binti Shahul Hamid
    Institute of Biological Sciences, University of Malaya, Malaysia
    [email protected]
    Dr. Karni S Moshal
    Department of Medicine, Alpert Medical School of Brown University, USA
    [email protected]
    Dr. Koh You Beng
    Institute of Mathematical Sciences, University of Malaya, Malaysia
    [email protected]
    Dr. Lim Sok Li
    Institute of Mathematical Sciences, University of Malaya, Malaysia
    [email protected]
    Dr. Ramesh Kasi
    Department of Physics, University of Malaya, Malaysia
    [email protected]
    Dr. Jasmine Elanie Binti Khairat
    Institute of Biological Sciences, University of Malaya, Malaysia
    [email protected]
    Dr. Nur Airina Binti Muhamad
    Institute of Biological Sciences, University of Malaya, Malaysia
    [email protected]
    Dr. Amizah Malip
    Department of Applied Mathematics, University of Malaya, Malaysia
    [email protected]
    Dr. Azzuliani Binti Supangat
    Department of Physics, University of Malaya, Malaysia
    [email protected]
    Prof. Mohamed Toutounji
    Professor, Department of Chemistry, United Arab Emirates University, UAE
    [email protected]
    Dr. Mohd Azmi Haron
    Institute of Mathematical Sciences, University of Malaya, Malaysia
    [email protected]
    Prof. Noordini Mohamad Salleh
    Department of Chemistry, University of Malaya, Malaysia
    [email protected]
    Dr. Ibrahim Bin Mohamed
    Institute of Mathematical Sciences, University of Malaya, Malaysia
    [email protected]
    Dr. Halijah Ibrahim
    Institute of Biological Sciences, University of Malaya, Malaysia
    [email protected]
    Dr. S. Chandra Kishore
    Assistant Professor, University of Information Science and Technology,
    “St. Paul The Apostle”, Macedonia, Greece
    [email protected]
    Dr. Salah Nasri
    Department of Physics, United Arab Emirates University, UAE
    [email protected]
    Dr. Dharini Pathmanathan
    Institute of Mathematical Sciences, University of Malaya, Malaysia
    [email protected]

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