Nonplanar structure of molecular tilt planes in the surface layers of smectic-[formula presented] free-standing liquid crystal films

Physical Review E - Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics

Volumn 66, Issue 4, 2002, Pages 4-

  Han, X F ^a   Olson, D A ^a   Cady, A ^a   Link, D R ^b   Clark, N A ^b   Huang, C C ^a  

^a University of Minnesota   (United States)

^b UNIVERSITY OF COLORADO   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

FILM THICKNESS; LIQUID CRYSTAL FILMS; NONPLANAR STRUCTURE; NULL TRANSMISSION ELLIPSOMETRY (NTE);

ELECTRIC FIELD EFFECTS; ELECTRODES; ELLIPSOMETRY; LIGHT POLARIZATION; MOLECULAR ORIENTATION; MOLECULAR STRUCTURE;

SMECTIC LIQUID CRYSTALS;

ARTICLE;

EID: 41349104424     PISSN: 1063651X     EISSN: None     Source Type: Journal    
DOI: 10.1103/PhysRevE.66.040701     Document Type: Article

References (21)

1. S. Heinekamp, R.A. Pelcovits, E. Fontes, E.Y. Chen, R. Pindak, and R.B. Meyer, Phys. Rev. Lett. 52, 1017 (1984).
2. P.O. Andreeva, V.K. Dolganov, C. Gors, R. Fouret and E.I. Kats, Phys. Rev. E 59, 4143 (1999).
3. D. Schlauf, Ch. Bahr, V.K. Dolganov, and J.W. Goodby, Eur. Phys. J. B 9, 461 (1999).
4. D.R. Link, G. Natale, N.A. Clark, J.E. Maclennan, M. Walsh, S.S. Keast, and M.E. Neubert, Phys. Rev. Lett. 82, 2508 (1999).
5. P.M. Johnson, D.A. Olson, S. Pankratz, Ch. Bahr, J.W. Goodby, and C.C. Huang, Phys. Rev. E 62, 8106 (2000).
6. C.Y. Chao, C.R. Lo, P.J. Wu, Y.H. Liu, D.R. Link, J.E. Maclennan, N.A. Clark, M. Veum, C.C. Huang, and J.T. Ho, Phys. Rev. Lett. 86, 4048 (2001).
7. N.A. Clark, T. Bellini, R.-F. Shao, D. Coleman, S. Bardon, D.R. Link, J.E. Maclennan, X.-H. Chen, M.D. Wand, D.M. Walba, P. Rudquist, and S.T. Lagerwall, Appl. Phys. Lett. 80, 4097 (2002). In this paper, MDW1397 is called MDW122C6.
8. D.A. Olson, X.F. Han, P.M. Johnson, A. Cady, and C.C. Huang, Liq. Cryst. (to be published).
9. P.M. Johnson, S. Pankratz, P. Mach, H.T. Nguyen, and C.C. Huang, Phys. Rev. Lett. 83, 4073 (1999).
10. (Formula presented) is not presented in this paper. Usually changes in (Formula presented) are much smaller than those in (Formula presented) Moreover, the symmetry property of (Formula presented) versus (Formula presented) curve is not as clearcut as that of (Formula presented) versus (Formula presented) curve.
11. The transition temperature from the bulk (Formula presented) phase with tilted surface layers to the (Formula presented) phase increases as film thickness decreases 6.
12. D.W. Berreman, J. Opt. Soc. Am. 62, 502 (1972);
13. H. Wöhler, G. Haas, M. Fritsch, and D.A. Mlynski, J. Opt. Soc. Am. A 5, 1554 (1988).
14. To minimize surface effects, the optical parameters were determined from films thicker than 20 layers.
15. Ch. Bahr and D. Fliegner, Phys. Rev. A 46, 7657 (1992).
16. K. Binder, Phase Transitions and Critical Phenomena, edited by C. Domb and J.L. Liebowitz (Academic, London, 1986), Vol. 8.
17. Since measurements of (Formula presented) and (Formula presented) for the synclinic and anticlinic state are not the purpose of this paper, error bars for them are not given. For the nonplanar state, additional parameters are needed to take care of the fluctuation. Thus error bars are not given either.
18. R. Pindak, C.Y. Young, R.B. Meyer, and N.A. Clark, Phys. Rev. Lett. 45, 1193 (1980).
19. The maximum strength of rotating E we applied was 40 V/cm. It was unable to induce the anticlinic-synclinic transition for very thin films. The transition was observed by Chao et al. with a larger strength of E 6.
20. Andreeva et al. proposed that the coupling between E and the larger of (Formula presented) and (Formula presented) determines whether the structure is anticlinic or synclinic 2.
21. The long alkyl tail (Formula presented) attached to the chiral center of this compound is different from that of MDW1397 and TFMHPOBC.