Browsing Artykuły (WFTIiMS) by Author "Buczkowska, Mariola"
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Dielectric and flexoelectric deformations induced by ac electric field in insulating nematic layers
Derfel, Grzegorz; Buczkowska, Mariola; Guzowski, Jakub (Wydawnictwo Politechniki ŁódzkiejLodz University of Technology. Press, 2010)The deformations of homeotropic nematic layers induced by ac electric field of frequency f were studied numerically. Two kinds of nematic liquid crystals with small negative dielectric anisotropy, Δε < 0, were considered: ... -
Direct current electric field induced deformations of dielectrically isotropic flexoelectronic nematic layers
Derfel, Grzegorz; Buczkowska, Mariola; Pietrzyk, Bartłomiej (Wydawnictwo Politechniki ŁódzkiejLodz University of Technology. Press, 2011)Deformations of nematic layers induced by d.c. electric field were studied numerically. The nematic liquid crystal under consideration possessed flexoelectric properties. Its dielectric anisotropy was zero, so the deformations ... -
Flexoelectric torque in uniformly lying helix structures of chiral nematic liquid crystal
Buczkowska, Mariola (Wydawnictwo Politechniki ŁódzkiejLodz University of Technology. Press, 2018)Electric field induced deformations of chiral nematic liquid crystal layers were studied numerically. Uniformly lying helix structure of short pitch flexoelectric mixtures was considered. The electro-optic effect due ... -
Flexoelectro-optic effect with large rotation angle of optic axis
Buczkowska, Mariola (Wydawnictwo Politechniki ŁódzkiejLodz University of Technology Press, 2020)The flexoelectro-optic effect in layers of chiral nematics was investigated numerically. The simulations concerned short pitch materials with the helix axis parallel to the layer plane. Configurations which allow to ... -
Influence of chirality on two-dimensional deformations of twisted flexoelectric nematic layers
Buczkowska, Mariola (Lodz University of Technology PressWydawnictwo Politechniki Łódzkiej, 2019)Two-dimensional deformations induced by electric field in twisted nematic cells filled with liquid crystal possessing flexoelectric properties were simulated numerically. The influence of chiral dopants on ... -
Influence of strong flaxoelectric properties on deformations of nematic liquid layers induced by DC electric field
Buczkowska, Mariola; Machlowski, Michał (Wydawnictwo Politechniki ŁódzkiejLodz University of Technology. Press, 2010)Deformations of nematic layers induced by electric field were studied numerically. The role of very strong flexoelectric properties was considered. The threshold voltages for deformations were calculated for nematics with ... -
Influence of tilted surface alignment on flexoelectric domains in twisted nematic layers
Buczkowska, Mariola; Derfel, Grzegorz (Wydawnictwo Politechniki ŁódzkiejLodz University of Technology. Press, 2017)The small deformations induced by electric field in twisted flexoelectric nematic layers were simulated numerically. The onedimensional (i.e. homogeneous over the whole area of the layer) and two-dimensional (i.e. ... -
Macroscopic model formulae describing anisotropic anchoring of nematic liquid crystals on solid substrates.
Derfel, Grzegorz; Buczkowska, Mariola (Wydawnictwo Politechniki ŁódzkiejLodz University of Technology. Press, 2015)Formulae used for description of anchoring energy of nematic liquid crystal aligned on solid substrates are reviewed. They are based on macroscopic approach considering the concepts of the easy axis and of the anchoring ... -
Numerical investigation of deformations of planar flexoelectric nematic layers containing ions
Buczkowska, Mariola; Wasilewski, Grzegorz (Wydawnictwo Politechniki ŁódzkiejLodz University of Technology. Press, 2008)Deformations of planar nematic layers of conducting nematic liquid crystal possessing flexoelectric properties and subjected to external d.c. voltage were studied numerically. Various kinds of electrodes, from strongly ... -
Numerical studies of significance of anchoring strength energy for behaviour of flexoelectric homeotropic nematic layer subjected to DC electric field
Buczkowska, Mariola; Grzelczak, Katarzyna (Wydawnictwo Politechniki ŁódzkiejLodz University of Technology. Press, 2009)Elastic deformations of homeotropic nematic liquid crystal layers subjected to a d.c. electric field were studied numerically. The flexoelectric properties of the nematic material and the presence of ionic space charge ... -
Role of ions mobility in flexoelectric deformations of conductive homeotropic nematic layers
Buczkowska, Mariola; Derfel, Grzegorz (Wydawnictwo Politechniki ŁódzkiejLodz University of Technology. Press, 2008)Numerical studies of d.c. electric field induced deformations of homeotropic layers of flexoelectric nematics containing ions are presented. It is shown that anomalous dependencies of threshold voltage for deformations on ... -
Temporal characteristics of DC electric field induced deformations of flexoelectric nematic layers
Derfel, Grzegorz; Buczkowska, Mariola (Wydawnictwo Politechniki ŁódzkiejLodz University of Technology. Press, 2012)Dynamics of DC electric field induced deformations of flexoelectric nematic layers were studied numerically. The characteristic response times were calculated. It was found that the cooperative effect of flexoelectricity ... -
Two-dimensional deformations in twisted flexoelectric nematic cells.
Derfel, Grzegorz; Buczkowska, Mariola (Wydawnictwo Politechniki ŁódzkiejLodz University of Technology. Press, 2016)Electric field induced deformations occurring in twisted nematic cells filled with liquid crystalline material possessing flexoelectric properties were simulated numerically. The aim of computations was to compare the ...