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Título : Pseudolayered structure of the columnar B1 phase of bent-core liquid crystals
Autor : Martínez-Perdiguero, J., Etxebarria, Jesús, Folcia, César L., Ortega, Josu, Gimeno, Nélida, Ros, M. Blanca
Fecha de publicación : Oct-2010
Editor: American Physical Society
Resumen: Three bent-core liquid-crystal compounds presenting the unusual columnar B1 to tilted polar smectic (Sm-CP or B2) phase transition are studied through small-angle x-ray diffraction on aligned samples. The well-established character of the smectic phase helps to characterize the structural changes during the transition. A mechanism for this transition is proposed, which accounts for the low enthalpy usually observed in this process. The B1 phase is found to possess a great degree of lamellarization, with pseudosmectic ferroelectric layers along the crystallographic (11) planes. As a consequence of these observations a distribution of the block polarizations in the columnar structure is proposed.
Descripción : 7 páginas, 11 figuras.-- PACS number(s): 61.30.-v,, 64.70.mj
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ISSN: 1539-3755
DOI: 10.1103/PhysRevE.82.041706
Citación : Physical Review E 82(4): 041706 (2010)
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