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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Wang, Ying
University of Twente
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (16/16 displayed)
- 2023Vital Signs Estimation Using a 26 GHz Multi-Beam Communication Testbed
- 2022Ostwald Ripening in an Oxide‐on‐Metal Systemcitations
- 2021Effect of Unit-Cell Size on the Barely Visible Impact Damage in Woven Compositescitations
- 2021Effect of Unit-Cell Size on the Barely Visible Impact Damage in Woven Compositescitations
- 2020Following the effect of braid architecture on performance and damage of carbon fibre/epoxy composite tubes during torsional straining
- 2020Damage evolution in braided composite tubes under torsion studied by in-situ X-ray computed tomographycitations
- 20187.6 Computed tomography of compositescitations
- 2018A finite element and experimental analysis of durability tested springscitations
- 2018Efficient and Selective Photocatalytic Oxidation of Benzylic Alcohols with Hybrid Organic-Inorganic Perovskite Materialscitations
- 2017X-ray computed tomography study of kink bands in unidirectional compositescitations
- 2015Time-lapse X-ray microtomographic imaging of compressive failure in carbon fibre-epoxy composites
- 2015A finite element analysis of composite T-joints used in wind turbine bladescitations
- 2011Power Converters for Power-Ultrasonic Transducers
- 2010Effect of the phenyl ring orientation in the polystyrene buffer layer on the performance of pentacene thin-film transistorscitations
- 2006Remarkably wide four-layer smectic phases in mixtures of liquid crystals and highly chiral dopantscitations
- 2004Association behavior between end-functionalized block copolymers PEO-PPO-PEO and poly(acrylic acid)citations
Places of action
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article
Remarkably wide four-layer smectic phases in mixtures of liquid crystals and highly chiral dopants
Abstract
A series of liquid crystalline mixtures that exhibit remarkably stable 4-layer intermediate phases, with phase ranges of around 30 °C, are reported. The mixtures are formed from a selenium-containing antiferroelectric material combined with up to 9% (by weight) of a highly chiral dopant. Various experimental methods including X-ray scattering and electro-optic techniques were employed in order to determine a set of physical parameters for each of the mixtures, such as smectic layer spacing, steric and optical tilt angles and spontaneous polarization. It is shown that the antiferroelectric phase is lost at dopant concentrations between 5 and 6%, when the stability of the 4-layer intermediate phase becomes significantly enhanced. This transition is associated with a decrease in the ratio of the spontaneous to flexoelectric coupling coefficients in the system. The combined observations suggest that molecular conformation is a more significant factor in stabilising the intermediate phases than chirality. The data are compared with existing theories of the intermediate phases and some, but not complete, agreement is observed. © The Royal Society of Chemistry 2006.