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| HAL: hal-00271680, version 1 |
| arXiv: 0804.1540 |
| DOI: 10.1140/epje/i2007-10323-0 |
| Detailed view |  Export this paper |
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| European Physical Journal E 26, 3 (2008) 261-273 |
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| Rich polymorphism of a rod-like liquid crystal (8CB) confined in two types of unidirectional nanopores |
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| Régis Guégan 1, 2Denis Morineau 1 |
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| (2008-07) |
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| We present a neutron and X-rays scattering study of the phase transitions of 4-n-octyl-4'-cyanobiphenyl (8CB) confined in unidirectional nanopores of porous alumina and porous silicon (PSi) membranes with an average diameter of 30 nm. Spatial confinement reveals a rich polymorphism, with at least four different low temperature phases in addition to the smectic A phase. The structural study as a function of thermal treatments and conditions of spatial confinement allows us to get insights into the formation of these phases and their relative stability. It gives the first description of the complete phase behavior of 8CB confined in PSi and provides a direct comparison with results obtained in bulk conditions and in similar geometric conditions of confinement but with reduced quenched disorder effects using alumina anopore membranes |
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| 1: | Institut de Physique de Rennes (IPR) |
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Université de Rennes 1 – CNRS : UMR6251 |
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| 2: | Institut des Sciences de la Terre d'Orléans (ISTO) |
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Université d'Orléans – CNRS : UMR6113 – Université François Rabelais - Tours – INSU |
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| 3: | Fonctions Optiques pour les Technologies de l'informatiON (FOTON) |
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CNRS : UMR6082 – Université de Rennes 1 – Institut National des Sciences Appliquées (INSA) - Rennes – Ecole Nationale Supérieure des Sciences Appliquées et de Technologie (ENSSAT) – Institut Mines-Télécom – Télécom Bretagne – PRES Université Européenne de Bretagne [UEB] |
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| 4: | Laboratoire Léon Brillouin (LLB) |
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CNRS : UMR12 – CEA : DSM/IRAMIS |
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| 5: | Fakultät für Physik und Elektrotechnik |
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Universitat des Saarlandes |
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| Subject | : | Physics/Condensed Matter/Soft Condensed Matter Sciences of the Universe/Earth Sciences/Geophysics Physics/Physics/Geophysics Environmental Sciences/Global Changes |
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| confinement – 8CB – liquid-crystal – neutron – quenched disorder – porous – silicon |
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| Attached file list to this document: | |||||
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| hal-00271680, version 1 | |
| http://hal.archives-ouvertes.fr/hal-00271680 | |
| oai:hal.archives-ouvertes.fr:hal-00271680 | |
| From: Denis Morineau | |
| Submitted on: Wednesday, 9 April 2008 21:27:29 | |
| Updated on: Friday, 10 June 2011 15:14:09 | |
