| People | Locations | Statistics |
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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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Dequidt, Alain
University of Clermont Auvergne
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (7/7 displayed)
- 2022Molecular interactions at the metal–liquid interfacescitations
- 2021Strain induced crystallization of polymers at and above the crystallization temperature by coarse-grained simulationscitations
- 2015Role of Dynamical Heterogeneities on the Viscoelastic Spectrum of Polymers: A Stochastic Continuum Mechanics Modelcitations
- 2013Mechanical Properties of Thin Confined Polymer Films Close to the Glass Transition in the Linear Regime of Deformation: Theory and Simulations
- 2012Mechanical properties of thin confined polymer films close to the glass transition in the linear regime of deformation: theory and simulations.citations
- 2012Mechanical properties of thin confined polymer films close to the glass transition in the linear regime of deformation: theory and simulations
- 2008Sliding planar anchoring and viscous surface torque in a cholesteric liquid crystalcitations
Places of action
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article
Sliding planar anchoring and viscous surface torque in a cholesteric liquid crystal
Abstract
We propose a new surface treatment allowing to obtain a sliding planar anchoring of nematic (or cholesteric) liquid crystals. It consists of depositing a thin layer of the polymercaptan hardener of an epoxy resin on an isotropic substrate (bare or ITO-coated glass plates). Microscopic observations of defect annihilations and capacitance measurements show that the molecules align parallel to the surface and slide viscously on it when they change orientation, which implies a zero (or extremely small) azimuthal anchoring energy. By contrast, the zenithal anchoring energy W_ is found to be larger than 3^{-5} J/m{^2}. We also measured the liquid crystal rotational surface viscosityby a new thermo-optical method using the large temperature variation of the pitch of a compensated cholesteric mixture. We found that the sliding length / (whereis the bulk rotational viscosity) is very large in comparison with the length of a liquid crystal molecule. This result is explained by a simple model which takes into account the diffusion of the liquid crystal within the polymer layer.