| Deduction of the temperature-dependent structure of the four-layer intermediate smectic phase using resonant X-ray scattering. | |
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MedLine Citation:
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PMID: 17641818 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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A binary mixture of an antiferroelectric liquid-crystal material containing a selenium atom and a highly chiral dopant is investigated using resonant X-ray scattering. This mixture exhibits a remarkably wide four-layer intermediate smectic phase, the structure of which is investigated over a temperature range of 16K. Analysis of the resonant X-ray scattering data allows accurate measurement of both the helicoidal pitch and the distortion angle as a function of temperature. The former decreases rapidly as the SmC* phase is approached, whilst the latter remains constant over the temperature range studied at 8 degrees +/-3 degrees. We also observe that the senses of the helicoidal pitch and the unit cell of the repeating four-layer structure are opposite in this mixture and that there is no pitch inversion over the temperature range studied. |
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Authors:
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P D Brimicombe; N W Roberts; S Jaradat; C Southern; S-T Wang; C-C Huang; E Dimasi; R Pindak; H F Gleeson |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S. Date: 2007-07-20 |
Journal Detail:
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Title: The European physical journal. E, Soft matter Volume: 23 ISSN: 1292-8941 ISO Abbreviation: Eur Phys J E Soft Matter Publication Date: 2007 Jul |
Date Detail:
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Created Date: 2007-08-16 Completed Date: 2007-11-13 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101126530 Medline TA: Eur Phys J E Soft Matter Country: France |
Other Details:
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Languages: eng Pagination: 281-7 Citation Subset: IM |
Affiliation:
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School of Physics and Astronomy, University of Manchester, Manchester, UK. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Complex Mixtures
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chemistry* Computer Simulation Liquid Crystals / chemistry* Models, Chemical* Phase Transition Selenium / chemistry* Temperature X-Ray Diffraction / methods* |
| Chemical | |
Reg. No./Substance:
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0/Complex Mixtures; 7782-49-2/Selenium |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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