High-resolution x-ray study of the nematic-smectic-A and smectic-A-smectic-C transitions in liquid-crystal-aerosil gels

Physical Review E - Statistical, Nonlinear, and Soft Matter Physics

Volumn 68, Issue 3 1, 2003, Pages 317061-317067

  Clegg, P S ^a   Birgeneau, R J ^a   Park, S ^b,f   Garland, C W ^b   Iannacchione, G S ^c   Leheny, R L ^d   Neubert, M E ^e  

^a UNIVERSITY OF TORONTO   (Canada)

^b Massachusetts Institute of Technology Cambridge   (United States)

^c Worcester Polytechnic Institute   (United States)

^d JOHNS HOPKINS UNIVERSITY   (United States)

^e KENT STATE UNIVERSITY   (United States)

^f NATIONAL INSTITUTE OF STANDARDS AND TECHNOLOGY   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

GELS; HYDROGEN BONDS; PHASE TRANSITIONS; QUENCHING; SMECTIC LIQUID CRYSTALS; THERMOTROPIC LIQUID CRYSTALS; X RAY DIFFRACTION;

AEROSIL NANOPARTICLES;

NEMATIC LIQUID CRYSTALS;

EID: 0242410538     PISSN: 1063651X     EISSN: None     Source Type: Journal    
DOI: None     Document Type: Article

References (23)

1. P. G. de Gennes, and J. Prost, The Physics of Liquid Crystals, 2nd ed. (Oxford University Press, Oxford, 1993).
2. S. Park, R.L. Leheny, R.J. Birgeneau, J.-L. Gallani, C.W. Garland, and G.S. Iannacchione, Phys. Rev. E 65, 050703(R) (2002).
3. R.L. Leheny, S. Park, R.J. Birgeneau, J.-L. Gallani, C.W. Garland, and G.S. Iannacchione, Phys. Rev. E 67, 011708 (2003).
4. G.S. Iannacchione, S. Park, C.W. Garland, R.J. Birgeneau, and R.L. Leheny, Phys. Rev. E 67, 011709 (2003).
5. P.S. Clegg, C. Stock, R.J. Birgeneau, C.W. Garland, A. Roshi, and G.S. Iannacchione, Phys. Rev. E 67, 021703 (2003).
6. G.S. Iannacchione, C.W. Garland, J.T. Mang, and T.P. Rieker, Phys. Rev. E 58, 5966 (1998).
7. H. Haga and C.W. Garland, Liq. Cryst. 23, 645 (1997).
8. C.A. Schantz, and D.L. Johnson, Phys. Rev. A 17, 1504 (1978).
9. M.E. Neubert, R.E. Cline, M.J. Zawaski, P.J. Wildman, and A. Ekachai, Mol. Cryst. Liq. Cryst. 76, 43 (1981).
10. C. R. Safinya, Ph.D. thesis, Massachusetts Institute of Technology, 1981.
11. T. Bellini, L. Radzihovsky, J. Toner, and N.A. Clark, Science 294, 1074 (2001).
12. C.C. Huang, and J.M. Viner, Phys. Rev. A 25, 3385 (1982).
13. R.J. Birgeneau, C.W. Garland, A.R. Kortan, J.D. Litster, M. Meichle, B.M. Ocko, C. Rosenblatt, L.J. Yu, and J. Goodby, Phys. Rev. A 27, 1251 (1983).
14. M. Meichle and C.W. Garland, Phys. Rev. A 27, 2624 (1983).
15. s, the finite instrumental resolution leads to large error bars and the data points are quite sparse to avoid radiation damage.
16. s=0.025, 0.039, 0.073 samples are based on fits to the tails of the peak, due to the resolution limited width.
17. R. Ribotta, R.B. Meyer, and G. Durand, J. Phys. (France) Lett. 35, L161 (1974).
18. J-H. Chen, and T.C. Lubensky, Phys. Rev. A 14, 1202 (1976).
19. L.J. Martinez-Miranda, A.R. Kortan, and R.J. Birgeneau, Phys. Rev. A 36, 2372 (1987).
20. C.R. Safinya, M. Kaplan, J. Als-Nielsen, R.J. Birgeneau, D. Davidov, J.D. Litster, D.L. Johnson, and M.E. Neubert, Phys. Rev. B 21, 4149 (1980).
21. The results of fits of the tricritical to mean-field crossover model to the temperature dependence of the tilt angle yields variations in the fit parameters as ρs is increased. The fourthorder term in the free energy expansion appears to increase with respect to the second-order term with increasing aerosil concentration. This is consistent with the system moving away from tricriticality. The variation is small and there is no obvious trend in the raw data.
22. A. Aharony and E. Pytte, Phys. Rev. B 27, 5872 (1983).
23. L. Radzihovsky and J. Toner, Phys. Rev. B 60, 206 (1999).