Observation of a Biaxial Nematic Phase in Potassium Laurate-1-Decanol-Water Mixtures
نویسندگان
چکیده
M. Toda, J. Phys. Soc. Jpn. 22, 431 (1967). M. Toda, Prog. Theor. Phys. Suppl. 45, 174 (1970). M. Toda, Rocky Mountain J. Math. 8, 197 (1978). A. C. Scott, F. Y. F. Chu, and D. W. McLaughlin, Proc. IEEE 61, 1443 (1973). Solitons and Condensed-Matter Physics, edited by A. R. Bishop and T. Schneider (Springer-Verlag, Berlin, 1978). A. H. Bishop, Phys. Scr. 20, 409 (1979). G. F. Mazenko and P. S. Sahni, Phys. Rev. B 18, 6139 (1978). T. Schneider and E. Stoll, Phys. Rev. Lett. 41, 1429 (1978). E. Stoll, T. Schneider, and A. R. Bishop, Phys. Rev. Lett. 42, 937 (1979), and 43, 405(E) (1979). L. Verlet, Phys. Rev. 159, 98 (1967). "H. Beck, in Dynamical Propeyties of Solids, edited by G. K. Horton and A. A. Maradudin (North-Holland, Amsterdam, 1974), Vol. II, p. 205.
منابع مشابه
Temperature-concentration behaviour of the order parameter in the nematic phases of a lyotropic liquid crystal
2014 The temperature variations of the order parameter invariants are measured in the uniaxial and biaxial nematic phases of different mixtures of potassium laurate, 1-decanoL D2O. They show that the uniaxial to biaxial nematic phase transitions are second-order and mean-field, including in the case of the reentrant concentration, which gives the sequence discotic-biaxial-discotic of nematic ph...
متن کاملStability of biaxial nematic phase for systems with variable molecular shape anisotropy.
We study the influence of fluctuations in molecular shape on the stability of the biaxial nematic phase by generalizing the mean-field model of Mulder and Ruijgrok [Physica A 113, 145 (1982)]. We limit ourselves to the case when the molecular shape anisotropy, represented by the alignment tensor, is a random variable of an annealed type. A prototype of such behavior can be found in lyotropic sy...
متن کاملNew Lyotropic Mixtures with Non-Chiral N-Acylamino Acid Surfactants Presenting the Biaxial Nematic Phase Investigated by Laser Conoscopy, Polarized Optical Microscopy and X-ray Diffraction
Amino acid-based surfactants were used as the main surfactants to prepare new lyotropic mixtures presenting three nematic phases. One of them is biaxial (NB), and the two others are uniaxial, discotic (ND) and calamitic (NC). These surfactants were the non-chiral molecules, potassium N-dodecanoyl-DL-alaninate (DL-KDDA), potassium N-dodecanoyl-DL-serinate (DL-KDDS), disodium N-dodecanoyl-DL-aspa...
متن کاملAnnihilation dynamics of stringlike topological defects in a nematic lyotropic liquid crystal.
Topological defects can appear whenever there is some type of ordering. Its ubiquity in nature has been the subject of several studies, from early Universe to condensed matter. In this work, we investigated the annihilation dynamics of defects and antidefects in a lyotropic nematic liquid crystal (ternary mixture of potassium laurate, decanol and deionized-destillated water) using the polarized...
متن کاملChanges in Aggregate Form, Size and Flexibility Along Phase Sequences in Lyotropic Liquid Crystals
A comparison is made between existing theories for self-assembling systems and experimental phase diagrams of complex systems made up of amphiphile/water/additives, with emphasis on phase transitions by changes in concentration. Evidence for di erent types of hexagonal (H) phases, in systems with detergent and lipid amphiphiles, are reviewed. It is shown that characteristics of the H phase and ...
متن کامل