X-Ray and Electrooptical Studies of Liquid Crystal Siloxane with a de Vries SmA* Phase
| Autor: | W. Kuczynski, Maurizio Nobili, F. Goc, Simona Samaritani, Giancarlo Galli, Christophe-H. Blanc, Vladimir Lorman |
|---|---|
| Přispěvatelé: | Laboratoire des colloïdes, verres et nanomatériaux (LCVN), Université Montpellier 2 - Sciences et Techniques (UM2)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Théorique et Astroparticules (LPTA), Université Montpellier 2 - Sciences et Techniques (UM2)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Groupe de Dynamique des Phases Condensées (GDPC), Centre National de la Recherche Scientifique (CNRS)-Université Montpellier 2 - Sciences et Techniques (UM2) |
| Rok vydání: | 2006 |
| Předmět: |
electrooptics
Diffraction Materials science de Vries smectic A* phase X-ray optics Analytical chemistry 02 engineering and technology 01 natural sciences law.invention chemistry.chemical_compound Optics Optical microscope Liquid crystal law Phase (matter) 0103 physical sciences 010306 general physics Polarized light microscopy Birefringence business.industry 021001 nanoscience & nanotechnology Condensed Matter Physics Electronic Optical and Magnetic Materials chemistry Siloxane [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci] 0210 nano-technology business |
| Zdroj: | Ferroelectrics Ferroelectrics, Taylor & Francis: STM, Behavioural Science and Public Health Titles, 2006, 343, pp.101-110. ⟨10.1080/00150190600962176⟩ |
| ISSN: | 1563-5112 0015-0193 |
| DOI: | 10.1080/00150190600962176 |
| Popis: | International audience; We present the X-ray diffraction, polarizing optical microscopy and electrooptic response studies of the chiral liquid crystal siloxane DSi3-MR11 [1] with a de Vries-type behavior. In a wide temperature range (b.Delta T sim 50°C) the material shows no layer shrinkage but a weak nearly linear layer spacing variation with temperature. Neither discontinuity nor slope change occurs at the SmA*-SmC* transition. In addition, using the X-ray data, the unusual electrooptic response in both 1st and 2nd harmonics together with known thermal behavior of birefringence, we evidence the cross-over from the classical orthogonal to the de Vries-like SmA* regime in DSi3-MR11 siloxane. |
| Databáze: | OpenAIRE |
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