Possible Phase Diagrams for Mixtures of ‘Positive’ and ‘Negative’ Nematic Liquid Crystals

  • Richard Alben


Common nematogenic materials consist of rod-like molecules whose longest axes tend to be parallel in the nematic phase. In addition to such ‘positive’ nematics, it is reasonable to expect that there might be ‘negative’ nematics with planar molecules aligned with their shortest axes parallel.1,2 We have studied a theoretical model which indicates that, if indeed such ‘negative’ nematics exist, then mixing them with suitable ‘positive’ nematics would produce some remarkable effects.3,4 We here describe our most significant findings. The details of our calculation may be found in Refs. 3 and 4.


Nematic Liquid Crystal Nematic Phase Calculate Phase Diagram Liquid Crystal Phase Planar Molecule 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    L. Onsager, Ann, N.Y. Acad. Sci. 51, 627 (1948).CrossRefGoogle Scholar
  2. 2.
    J.F. Dreyer in Liquid Crystals and Ordered Fluids (Plenum Press, 1970), p. 311.Google Scholar
  3. 3.
    R. Alben, Phys. Rev. Letters 30, 778 (1973).CrossRefGoogle Scholar
  4. 4.
    C.S. Shih and R. Alben, J. Chem. Phys. 57, 3055 (1972); R. Alben (submitted to J. Chem. Phys.).CrossRefGoogle Scholar
  5. 5.
    M.J. Frieser, Phys. Rev. Letters 24, 1041 (1970).CrossRefGoogle Scholar
  6. 6.
    A.C. deKock, Z. Phys. Chem. (Leipzig) 48, 129 (1904).Google Scholar
  7. 7.
    A. Sussman, Appl. Phys. Letters 21, 126 (1972).CrossRefGoogle Scholar
  8. 8.
    P.E. Cladis, J. Rault, and J.-P. Burger, Mol. Cryst. Liquid Cryst. 13, 1 (1971).CrossRefGoogle Scholar
  9. 9.
    H. Arnold, Z. Phys. Chem (DDR) 226, 146 (1964).Google Scholar

Copyright information

© Plenum Press, New York 1974

Authors and Affiliations

  • Richard Alben
    • 1
  1. 1.Dept. of Engineering & Applied ScienceYale UniversityNew HavenUSA

Personalised recommendations