Smectic-A and smectic-C phases and phase transitions in 8̅ S5 liquid-crystal-aerosil gels
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 transition...
| Main Authors: | , , , , , , , |
|---|---|
| Other Authors: | |
| Format: | Article |
| Language: | en_US |
| Published: |
American Physical Society (APS)
2012
|
| Online Access: | http://hdl.handle.net/1721.1/68654 https://orcid.org/0000-0002-6458-1866 |
| _version_ | 1826214258123210752 |
|---|---|
| author | Garland, Carl W. Freelon, Byron Ramazanoglu, M. Chung, P. J. Page, R. N. Lo, Yuan-Tse Valdivia, P. Birgeneau, R. J. |
| author2 | Massachusetts Institute of Technology. Department of Chemistry |
| author_facet | Massachusetts Institute of Technology. Department of Chemistry Garland, Carl W. Freelon, Byron Ramazanoglu, M. Chung, P. J. Page, R. N. Lo, Yuan-Tse Valdivia, P. Birgeneau, R. J. |
| author_sort | Garland, Carl W. |
| collection | MIT |
| description | 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. |
| first_indexed | 2024-09-23T16:02:17Z |
| format | Article |
| id | mit-1721.1/68654 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T16:02:17Z |
| publishDate | 2012 |
| publisher | American Physical Society (APS) |
| record_format | dspace |
| spelling | mit-1721.1/686542022-09-29T17:47:24Z Smectic-A and smectic-C phases and phase transitions in 8̅ S5 liquid-crystal-aerosil gels Garland, Carl W. Freelon, Byron Ramazanoglu, M. Chung, P. J. Page, R. N. Lo, Yuan-Tse Valdivia, P. Birgeneau, R. J. Massachusetts Institute of Technology. Department of Chemistry Massachusetts Institute of Technology. School of Science Garland, Carl W. Garland, Carl W. 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. United States. Dept. of Energy. Office of Basic Energy Sciences (Contract No. DE-ACO2-05CH11231) University of California, Berkeley 2012-01-25T20:11:32Z 2012-01-25T20:11:32Z 2011-09 2011-04 Article http://purl.org/eprint/type/JournalArticle 1539-3755 1550-2376 http://hdl.handle.net/1721.1/68654 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 https://orcid.org/0000-0002-6458-1866 en_US http://dx.doi.org/10.1103/PhysRevE.84.031705 Physical Review E Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf American Physical Society (APS) APS |
| spellingShingle | Garland, Carl W. Freelon, Byron Ramazanoglu, M. Chung, P. J. Page, R. N. Lo, Yuan-Tse Valdivia, P. Birgeneau, R. J. Smectic-A and smectic-C phases and phase transitions in 8̅ S5 liquid-crystal-aerosil gels |
| title | Smectic-A and smectic-C phases and phase transitions in 8̅ S5 liquid-crystal-aerosil gels |
| title_full | Smectic-A and smectic-C phases and phase transitions in 8̅ S5 liquid-crystal-aerosil gels |
| title_fullStr | Smectic-A and smectic-C phases and phase transitions in 8̅ S5 liquid-crystal-aerosil gels |
| title_full_unstemmed | Smectic-A and smectic-C phases and phase transitions in 8̅ S5 liquid-crystal-aerosil gels |
| title_short | Smectic-A and smectic-C phases and phase transitions in 8̅ S5 liquid-crystal-aerosil gels |
| title_sort | smectic a and smectic c phases and phase transitions in 8 s5 liquid crystal aerosil gels |
| url | http://hdl.handle.net/1721.1/68654 https://orcid.org/0000-0002-6458-1866 |
| work_keys_str_mv | AT garlandcarlw smecticaandsmecticcphasesandphasetransitionsin8s5liquidcrystalaerosilgels AT freelonbyron smecticaandsmecticcphasesandphasetransitionsin8s5liquidcrystalaerosilgels AT ramazanoglum smecticaandsmecticcphasesandphasetransitionsin8s5liquidcrystalaerosilgels AT chungpj smecticaandsmecticcphasesandphasetransitionsin8s5liquidcrystalaerosilgels AT pagern smecticaandsmecticcphasesandphasetransitionsin8s5liquidcrystalaerosilgels AT loyuantse smecticaandsmecticcphasesandphasetransitionsin8s5liquidcrystalaerosilgels AT valdiviap smecticaandsmecticcphasesandphasetransitionsin8s5liquidcrystalaerosilgels AT birgeneaurj smecticaandsmecticcphasesandphasetransitionsin8s5liquidcrystalaerosilgels |