Electric field induced biaxiality and the electro-optic effect in a bent-core nematic liquid crystal

被引：52
|
作者：
Nagaraj, Mamatha [1 ]
Panarin, Y. P. [1 ,2 ]
Manna, U. [1 ]
Vij, J. K. [1 ]
Keith, C. [3 ]
Tschierske, C. [3 ]
机构：
[1] Trinity Coll Dublin, Dept Elect & Elect Engn, Dublin 2, Ireland
[2] Dublin Inst Technol, Sch Elect & Commun Engn, Dublin 8, Ireland
[3] Univ Halle Wittenberg, Inst Organ Chem, D-06120 Halle, Germany
来源：
APPLIED PHYSICS LETTERS | 2010年 / 96卷 / 01期
关键词：
electro-optical effects; nematic liquid crystals; MESOGENS; PHASE;
D O I：
10.1063/1.3280817
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We report the observation of a biaxial nematic phase in a bent-core molecular system using polarizing microscopy, electro-optics, and dielectric spectroscopy, where we find that the biaxiality exists on a microscopic scale. An application of electric field induces a macroscopic biaxiality and in consequence gives rise to electro-optic switching. This electro-optic effect shows significant potential in applications for displays due to its fast high-contrast response. The observed electro-optic switching is explained in terms of the interaction of the ferroelectric clusters with the electric field.
引用
收藏
页数：3
相关论文
共 50 条
  • [1] Electro-optic Response of a Nematic Bent Core Liquid Crystal
    Elamain, Omaima
    Hegde, Gurumurthv
    Fodor-Csorba, Katelin
    Komitov, Lachezar
    [J]. IDW'11: PROCEEDINGS OF THE 18TH INTERNATIONAL DISPLAY WORKSHOPS, VOLS 1-3, 2011, : 1567 - 1569
  • [2] Macroscopic biaxiality and electric-field-induced rotation of the minor director in the nematic phase of a bent-core liquid crystal
    Nagaraj, Mamatha
    Merkel, K.
    Vij, J. K.
    Kocot, A.
    [J]. EPL, 2010, 91 (06)
  • [3] Direct confirmation of biaxiality in a bent-core mesogen through the measurement of electro-optic characteristics
    Lee, Gak Seok
    Cho, Jin Seok
    Kim, Jae Chang
    Yoon, Tae-Hoon
    Shin, Sung Tae
    [J]. JOURNAL OF APPLIED PHYSICS, 2009, 105 (09)
  • [4] Search for biaxiality in a shape-persistent bent-core nematic liquid crystal
    Kim, Young-Ki
    Majumdar, Madhabi
    Senyuk, Bohdan I.
    Tortora, Luana
    Seltmann, Jens
    Lehmann, Matthias
    Jakli, Antal
    Gleeson, Jim T.
    Lavrentovich, Oleg D.
    Sprunt, Samuel
    [J]. SOFT MATTER, 2012, 8 (34) : 8880 - 8890
  • [5] Electro-optic technique to study biaxiality of liquid crystals with positive dielectric anisotropy: The case of a bent-core material
    Khoa Van Le
    Mathews, Manoj
    Chambers, Martin
    Harden, John
    Li, Quan
    Takezoe, Hideo
    Jakli, Antal
    [J]. PHYSICAL REVIEW E, 2009, 79 (03):
  • [6] Raman Scattering Study of Phase Biaxiality in a Thermotropic Bent-Core Nematic Liquid Crystal
    Park, Min Sang
    Yoon, Beom-Jin
    Park, Jung Ok
    Prasad, Veena
    Kumar, Satyendra
    Srinivasarao, Mohan
    [J]. PHYSICAL REVIEW LETTERS, 2010, 105 (02)
  • [7] Dielectric and electro-optic studies of a bimesogenic liquid crystal composed of bent-core and calamitic units
    Balachandran, R.
    Panov, V. P.
    Vij, J. K.
    Shanker, G.
    Tschierske, C.
    Merkel, K.
    Kocot, A.
    [J]. PHYSICAL REVIEW E, 2014, 90 (03):
  • [8] Field-induced texture transitions in a bent-core nematic liquid crystal
    Stannarius, R.
    Eremin, A.
    Tamba, M. -G.
    Pelzl, G.
    Weissflog, W.
    [J]. PHYSICAL REVIEW E, 2007, 76 (06):
  • [9] Synthesis of bent-core liquid crystals to induce biaxiality in the nematic phase
    Li, Quan
    Wang, Yan
    Bisoyi, Hari Krishna
    Yoon, HyungGuen
    Kumar, Satyendra
    [J]. ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, 2012, 244
  • [10] Electric field effect on the phase diagram of a bent-core liquid crystal
    Vita, Francesco
    Placentino, Immacolata F.
    Ferrero, Claudio
    Singh, Gautam
    Samulski, Edward T.
    Francescangeli, Oriano
    [J]. SOFT MATTER, 2013, 9 (28) : 6475 - 6481
12345