Smectic-A and smectic-C phases and phase transitions in 8̅ S5 liquid-crystal-aerosil gels
Name
Freelon-2011-Smectic-A and smectic-C phases and.pdf
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Author(s)
Garland, Carl W.
Freelon, Byron
Ramazanoglu, M.
Chung, P. J.
Page, R. N.
Lo, Yuan-Tse
Valdivia, P.
Birgeneau, R. J.
Date Issued
September 2011
Journal
Physical Review E
Publisher
American Physical Society (APS)
Citation
Freelon, B. et al. “Smectic-A and smectic-C phases and phase transitions in 8[over ¯]S5 liquid-crystal-aerosil gels.” Physical Review E 84.3 (2011): n. pag. Web. 25 Jan. 2012. © 2011 American Physical Society
Version
Final published version
Abstract
High-resolution x-ray scattering studies of the nonpolar thermotropic liquid crystal 4-n-pentylphenylthiol-4′-n-octyloxybenzoate (8̅ S5) in aerosil gel nanonetworks reveal that the aerosil-induced disorder significantly alters both the nematic to smectic-A and smectic-A to smectic-C phase transitions. The limiting 8̅ S5 smectic-A correlation length follows a power-law dependence on the aerosil density in quantitative agreement with the limiting lengths measured previously in other smectic-A liquid crystal gels. The smectic-A to smectic-C liquid crystalline phase transition is altered fundamentally by the presence of the aerosil gel. The onset of the smectic-C phase remains relatively sharp but there is an extended coexistence region where smectic-A and smectic-C domains can exist.
MIT Department
Massachusetts Institute of Technology. Department of Chemistry
Massachusetts Institute of Technology. School of Science
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DOI of Published Version
https://doi.org/10.1103/PhysRevE.84.031705
