dc.contributor.author | Sebastián Ugarteche, Nerea | |
dc.contributor.author | López, David Orencio | |
dc.contributor.author | Díez Berart, Sergio | |
dc.contributor.author | De la Fuente Lavín, María Rosario | |
dc.contributor.author | Salud, Josep | |
dc.contributor.author | Pérez Jubindo, Miguel Ángel | |
dc.contributor.author | Ros, Blanca María | |
dc.date.accessioned | 2014-02-21T17:32:34Z | |
dc.date.available | 2014-02-21T17:32:34Z | |
dc.date.issued | 2011-10 | |
dc.identifier.citation | Materials 4(10) : 1632-1647 (2011) | es |
dc.identifier.issn | 1996-1944 | |
dc.identifier.uri | http://hdl.handle.net/10810/11604 | |
dc.description.abstract | In this work, a study of the nematic (N)-isotropic (I) phase transition has been made in a series of odd non-symmetric liquid crystal dimers, the alpha-(4-cyanobiphenyl-4'-yloxy)-omega-(1-pyrenimine-benzylidene-4'-oxy) alkanes, by means of accurate calorimetric and dielectric measurements. These materials are potential candidates to present the elusive biaxial nematic (N-B) phase, as they exhibit both molecular biaxiality and flexibility. According to the theory, the uniaxial nematic (N-U)-isotropic (I) phase transition is first-order in nature, whereas the N-B-I phase transition is second-order. Thus, a fine analysis of the critical behavior of the N-I phase transition would allow us to determine the presence or not of the biaxial nematic phase and understand how the molecular biaxiality and flexibility of these compounds influences the critical behavior of the N-I phase transition. | es |
dc.description.sponsorship | The authors are grateful for financial support from the MICINN project MAT2009-14636-C03-01,02,03. The authors also thank the recognition from the Generalitat de Catalunya of GRPFM as Emergent Research Group and from the Gobierno Vasco (GI/IT-449-10). One of us, N. Sebastian would like to thank the Universidad del Pais Vasco for a pre-doctoral grant. | es |
dc.language.iso | eng | es |
dc.publisher | MDPI | es |
dc.rights | info:eu-repo/semantics/openAccess | es |
dc.subject | liquid crystal dimers | es |
dc.subject | phase transitions | es |
dc.subject | critical exponents | es |
dc.subject | calorimetry | es |
dc.subject | dielectric spectroscopy | es |
dc.title | Effect of Molecular Flexibility on the Nematic-to-Isotropic Phase Transition for Highly Biaxial Molecular Non-Symmetric Liquid Crystal Dimers | es |
dc.type | info:eu-repo/semantics/article | es |
dc.rights.holder | © 2011 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license(http://creativecommons.org/licenses/by/3.0/) | es |
dc.relation.publisherversion | http://www.mdpi.com/1996-1944/4/10/1632 | es |
dc.identifier.doi | 10.3390/ma4101632 | |
dc.departamentoes | Física aplicada II | es_ES |
dc.departamentoeu | Fisika aplikatua II | es_ES |
dc.subject.categoria | MATERIALS SCIENCE | |