The subject of my scientific activity is physics of liquid crystals. My works concerns the electric field induced deformations of director field occurring in layers of nematic liquid crystals.
The interactions of liquid crystals with external electric field are due to dielectric anisotropy as well as to flexoelectric properties. The elastic deformations arising under the action of electric field are fundamental for applications in liquid crystal devices.
The aims of my studies are as follows:
Method. The deformations of nematic layers are described by a set of complicated nonlinear differential equations which cannot be resolved analytically. Therefore the numerical methods must be used. Such approach allows to check the role of parameters from wide ranges which can indicate new fields of syntheses and experimental investigations. The results of such computations yield information which is impossible or difficult to achieve in real experiments or theoretical consideration.
I am a member of Polish Liquid Crystal Society.
The most important scientific publications
1. G. Derfel, M. Buczkowska
“Flexoelectric deformations of homeotropic nematic layers in the presence of ionic conductivity”,
Liquid Crystals, 32, (9) 1183-1190, (2005)
2. M. Buczkowska, G. Derfel
“Influence of ionic transport on deformations of homeotropic nematic layers with positive flexoelectric coefficients”,
Liquid Crystals, 32, (10) 1285-1293, (2005)
3. G. Derfel, M. Buczkowska
“Threshold voltage for purely flexoelectric deformations of conducting homeotropic nematic layers”,
Liquid Crystals, 34, (1) 113-125, (2007)
4. M. Buczkowska
“Influence of ions on stability of planar and homeotropic structures in hybrid aligned flexoelectric nematic layers subjected to electric field”
Liquid Crystals, 35, (10) 1199-1203, (2008)
5. M. Buczkowska
“Strong deformations induced by a DC electric field in homeotropic flexo-electric nematic layers”
Liquid Crystals, 37, (10) 1331-1337, (2010)
6. M. Buczkowska, G. Derfel
„Analysis of deformations of flexoelectric homeotropic liquid crystal layers with various anchoring strengths”
Opto-Electronics Review, 19 (1) 56-60, (2011)
7. G. Derfel, M. Buczkowska
“Numerical study of deformations induced by ac electric field in insulating flexoelectric nematic layers”
Opto-Electronics Review, 19, (1) 66-70, (2011)
8. M. Buczkowska
“Numerical analysis of deformations induced by dc electric field in homeotropic nematic layers with giant flexoelectricity”
Molecular Crystals and Liquid Crystals, 543, 48-56, ( 2011)
9. G. Derfel, M. Buczkowska
“Numerical study of flexoelectric longitudinal domains”
Molecular Crystals and Liquid Crystals, 547, 213-221, ( 2011)
10. G. Derfel, M. Buczkowska
"Ion adsorption and its influence on dc electric field induced deformations of flexoelectric nematic layers"
Journal of Chemical Physics, 135, 014903-1 - 014903-6, (2011)
11. M. Buczkowska, G. Derfel
„Optical properties of homeotropically aligned flexoelectric nematic layers deformed by direct current electric field”
Journal of Applied Physics, 110, 053514-1 - 053514-4 (2011)
12. M. Buczkowska
„Converse flexoelectric effect in homeotropic nematic layers with asymmetric surface anchoring”
Liquid Crystals, 39, (7) 873-879, (2012)
13. G. Derfel, M. Buczkowska
“Dynamics of electric field induced deformations in flexoelectric nematic layers “
Liquid Crystals, 40, (2), 272-280, (2013)
14. G. Derfel, M. Buczkowska
"Threshold voltages and optical retardation of deformed flexoelectric nematic layers with asymmetric surface anchoring"
Opto-Electronics Review, 21, (2), 205-209, (2013)
15. G. Derfel, M. Buczkowska
"Electro-optical effects in hybrid aligned flexoelectric nematic layers"
Journal of Applied Physics, 114, (17)173510-1 - 173510 - 5, (2013)
16. M. Buczkowska, G. Derfel
Role of flexoelectricity in electro-optical properties of hybrid aligned nematic layers”,
Applied Physics Letters, 103, 211115-1 - 211115-4 (2013)
17. M. Buczkowska, G. Derfel
“Backflow in flexoelectric nematic layers deformed by electric field”,
Liquid Crystals, 42, (2) 169-175 (2014)
Office hours in winter semester 2019/2020
Tuesday, 14.15 - 15.00
Wednesday, 13.15 - 14.00
Room 3.09, Institute of Physics
Textures of liquid crystals observed under polarizing microscope during exercises at Liquid Crystals Physics Laboratory.