Anomalous anisotropy of the elastic constants in the induced smectic O film

References

• Ocko , B. M. , Braslau , A. , Pershan , P. S. , Als-Nielsen , J. and Deutsch , M. 1986 . Phys. Rev. Lett. , 57 : 94
   PubMed Web of Science ®Google Scholar
• Swanson , B. D. , Stragier , H. , Tweet , D. J. and Sorensen , J. B. 1989 . Phys. Rev. Lett. , 62 : 909
   PubMed Web of Science ®Google Scholar
• Levelut , A. M. , Germain , C. , Keller , P. , Liébert , L. and Billard , J. 1983 . J. Phys., Paris , 44 : 623
   Web of Science ®Google Scholar
• Galerne , Y. and Liébert , L. 1989 . Second International Conference on Ferroelectric Liquid Crystals , Göteborg (Sweden) . Communication O27;1990, Phys. Rev. Lett. 64, 906; 1991, Ibid. 66, 2891.
   Google Scholar
• Takezoe , H. , Chandani , A. D. L. , Furukawa , K. and Kishi , A. 1989 . Second International Conference on Ferroelectric Liquid Crystals Göteborg (Sweden) Communication O26. Gorecka, E., Chandani, A. D. L., Ouchi, Y., Takezoe, H., and Fukuda, A.,1990, J. J. appl. Phys. 29, 131 and references therein.
   Google Scholar
• Hara , M. , Umemoto , T. , Takezoe , H. , Garito , A. and Sasabe , H. 1991 . Jap. J. appl. Phys. , 30 : 2052
   Web of Science ®Google Scholar
• The electric polarization at the interface with the isotropic droplet which could be due to ordoelectricity, can be neglected. Its amplitude is at least one order of magnitude smaller than the contribution arising from the other interface, since no parity effect is observed in the measurements of the total polarization of the film versus its number of layers [4]. Let us recall also that the electric polarization of the interface with air probably arises from the reduced polarizability of the aliphatic tips of the molecules in contact with air, resulting from the reduced dielectric constant of their surroundings compared to those in the bulk. Another contribution could also come from the average electropositivity of the molecule. This chemical property always makes the liquid crystal slightly positively charged, as is demonstrated from the slow drift of the droplet towards the negative electrode.
   Google Scholar
• Galerne , Y. 1992 . Europhysics Lett. , 18 : 511
   Google Scholar
• Karat , P. P. , Madhusudana , N. V. , de Jeu , W. H. and Claassen , W. A. P. 1977 . Molec. Crystals liq. Crystals , 40 : 239 1977, J. chem. Phys. 67, 3705. Schad, H., Baur, G., and Meier, G., 1979, J. chem. Phys. 70, 2770.
   Web of Science ®Google Scholar
• Leenhouts , F. and Dekker , A. J. 1981 . J. chem. Phys. , 74 : 1956
   Web of Science ®Google Scholar
• van der Meulen , J. P. and Zijlstra , R. J. J. 1984 . J. Phys. Paris. , 45 : 1347
   Web of Science ®Google Scholar
• Hall , R. , Miyachi , K. , Newton , D. , Takezoe , H. and Fukuda , A. 1992 . Jap. J. appl. Phys. , 31 : 329 and references therein.
   Google Scholar
• Galerne , Y. , Martinand , J. L. , Durand , G. and Veyssié , M. 1972 . Phys. Rev. Lett. , 29 : 562
   Web of Science ®Google Scholar
• Candel , V. and Galerne , Y. , eds. to be published).
   Google Scholar
• Let us remark that in this experiment, the liquid crystal droplet behaves as a dielectric, and that the electric field is established by means of residual conduction in or at the surface of the glass plate which supports the sample. So, it does not really matter whether the droplet is in contact with the electrodes or not; the electric field E is everywhere equal to the applied voltage divided by the distance between the electrodes.
   Google Scholar
• Rosenblatt , C. , Pindar , R. , Clark , N. A. and Meyer , R. B. 1979 . Phys. Rev. Lett. , 42 : 1220
   Web of Science ®Google Scholar