Collective molecular reorientation of a calamitic liquid crystal (12CB) confined in alumina nanochannels
| Autor: | Chahine, Gilbert, Kityk, I.V., Kityk, Andriy V, Démarest, Nathalie, Jean, Fabien, Knorr, Klaus, Huber, Patrick, Lefort, Ronan, Zanotti, Jean-Marc, Morineau, Denis |
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| Přispěvatelé: | Institut de Physique de Rennes (IPR), Université de Rennes (UR)-Centre National de la Recherche Scientifique (CNRS), Electrical Engineering Department, Czestochowa University Technology, Institute of Computer and Information Sciences (ICIS), University of Czestochowa, Experimental Physics, Saarland University [Saarbrücken], Laboratoire Léon Brillouin (LLB - UMR 12), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Saclay |
| Jazyk: | angličtina |
| Rok vydání: | 2010 |
| Předmět: |
Birefringence
Materials science Isotropy 02 engineering and technology Neutron scattering 021001 nanoscience & nanotechnology 01 natural sciences [PHYS.PHYS.PHYS-GEN-PH]Physics [physics]/Physics [physics]/General Physics [physics.gen-ph] law.invention Crystal law Liquid crystal Chemical physics Phase (matter) 0103 physical sciences 61.30.Pq 64.70.mj 68.08.p Texture (crystalline) Crystallization 010306 general physics 0210 nano-technology |
| Zdroj: | Physical Review E : Statistical, Nonlinear, and Soft Matter Physics Physical Review E : Statistical, Nonlinear, and Soft Matter Physics, 2010, 82, pp.011706. ⟨10.1103/PhysRevE.82.011706⟩ Physical Review E : Statistical, Nonlinear, and Soft Matter Physics, American Physical Society, 2010, 82, pp.011706. ⟨10.1103/PhysRevE.82.011706⟩ |
| ISSN: | 1539-3755 1550-2376 |
| DOI: | 10.1103/PhysRevE.82.011706⟩ |
| Popis: | International audience; We study the smectic director structure of the rodlike liquid crystal 4-n-dodecyl-4cyanobiphenyl 12CB confined in cylindrical cavities of 200 nm diameter in porous alumina templates by means of combined broadband dielectric spectroscopy, optical birefringence, and neutron scattering measurements. We show that the collective molecular orientation differs between entering the smectic A phase upon cooling from the isotropic state and entering the same phase upon heating while melting the confined crystal. We discuss this collective molecular realignment in terms of a competition between weak planar anchoring at the p-Al2O3 /12CB interface and a preferred texture typical of the crystallization of rodlike molecules in nanochannels Bridgman growth. |
| Databáze: | OpenAIRE |
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