Scientific divisions

Staff

Head of group

The group

Notable former group members

  • Prof. Dr. hab. Wojciech Kuczyński

  • Dr. hab. Jerzy Hoffmann, Prof. IFM PAN

  • Dr. hab. Wojciech Jeżewski, Prof. IFM PAN


Photo

Equipment

1. Equipment for investigations of the optical properties

  1. Olympus Fluoview 1000 IX83 confocal microscope

    The dye molecules are excited using diode laser (λ = 473 nm) with the beam power equal to 1.24 mW. The fluorescence signal is detected in the spectral range 490 - 540 nm. A pinhole discriminates against the regions above and below the selected volume. The pinhole size is adjusted depending on magnification and numerical aperture of the objective.
    To obtain the 3D image of the whole sample, the focused beam scans the sample in the horizontal plane (xy-directions) and then mechanical refocusing at different depth (z-direction) in the sample and repeating the horizontal scanning. Each horizontal scan produces a thin ‘optical slice’ with thickness determined by the resolution of FCPM. The intensity of fluorescence as the function of coordinates is measured and stored in the computer memory.

  2. Polarizing microscope BX53 firmy Olympus

    Experimental set-up for microscopic study of textures, phase transitions in temperature range 300 K–500 K with an accuracy of ± 0.01 K.

  3. Spectrophotometer UV-VIS-NIR model V-670 (JASCO)

    Equipment for optical spectroscopy in wavelenght range 190-2700 nm.

  4. Experimental set-up for investigations of birefringence of LC.
    (Hinds PEM 100 Photoelastic Modulator)

Equipment for dielectric measurements

Temperature range 300 K–500 K with an accuracy of ± 0.01 K.

  1. Experimental setup I for dielectric and electrooptic measurements
    (Impedance Analyzer HP 4192A + Lock-in voltmeter SR 850).

    • frequency range for dielectric measurements - 5 Hz–10 MHz,
    • frequency range for electrooptic measurements - 5 Hz–100 kHz.
  2. Experimental setup II for dielectric and electrooptic measurements
    (Impedance Analyzer Wayne Kerr 6440B + Lock-in voltmeter SR 530).

    • frequency range for dielectric measurements - 5 Hz–3 MHz,
    • measurements voltage 0.1 V – 10 V,
    • frequency range for electrooptic measurements - 5 Hz–100 kHz.
  3. Experimental set-up III for investigations of spontaneous polarization and switching current of LC in frequency range
    • frequency range – 0.05 Hz–10 kHz,
    • measurements voltage - 2 V – 400 V.

Additional equipment

High speed video system Olympus i-SPEED 2

For each experimental setup, the Olympus high speed camera can be attached.
The speed of the microscopic image registration -2000-3000 frame/s.

Publications

Publications: 2022, 2021, 2020, 2019, 2018, 2017, 2016, 2015, 2014, 2013, 2012, 2011, 2010, 2009, 2008, 2007, 2006, 2005, 2004, 2003, 2002, 2001

2022

  1. T. Yevchenko, D. Dardas, W. Kuczyński, A.C. Brańka
    Determining the Kerr constant in optically isotropic liquid crystals
    Physical Review E 106, 014701 (2022)
  2. S. Pieprzyk, T. Yevchenko, D. Dardas, A.C. Brańka
    Phase transitions and physical properties by a color texture analysis: Results for liquid crystals
    Journal of Molecular Liquids 362, 119699 (2022)
  3. D.M. Heyes, S. Pieprzyk, A.C. Brańka
    Bulk viscosity of hard sphere fluids by equilibrium and nonequilibrium molecular dynamics simulations
    Journal of Chemical Physics 157, 114502 (2022)
  4. S. Lalik, O. Stefańczyk, D. Dardas, A. Deptuch, T. Yevchenko, S.-i. Ohkoshi, M. Marzec
    Nanocomposites Based on Antiferroelectric Liquid Crystal (S)-MHPOBC Doping with Au Nanoparticles
    Molecules 27, 3663 (2022)

2021

  1. S. Pieprzyk, S.B. Yuste, A. Santos, M. López de Haro, A.C. Branka
    Structural properties of additive binary hardsphere mixtures. II. Asymptotic behavior and structural crossovers
    Physical Review E 140, 024128 (2021)
  2. S. Pieprzyk, S.B. Yuste, A. Santos, M. López de Haro, A.C. Brańka
    Structural properties of additive binary hard-sphere mixtures. III. Direct correlation functions
    Physical Review E 104, 054142 (2021)
  3. D.M. Heyes, S. Pieprzyk, A.C. Brańka
    Application of cell models to the melting and sublimation lines of the Lennard-Jones and related potential systems
    Physical Review E 104, 044119 (2021)
  4. S. Lalik, O. Stefańczyk, D. Dardas, N. Górska, S.I. Ohkoshi, M. Marzec
    Modifications of FLC physical properties through doping with Fe2O3 nanoparticles (Part I)
    Materials 140, 4722 (2021)
  5. D. Dardas, I. Dierking
    Obituary professor Wojciech Kuczyński (1941-2020)
    Liquid Crystals Today 40, 60 (2021)
  6. J. Kreisel, A. Brańka, D. Dardas, K. Roleder
    Professor Wojciech Kuczyński (1941–2020)
    Phase Transitions 40, 63 (2021)
  7. N. Bielejewska, R. Hertmanowski
    Surface characterization of nanocomposite Langmuir films based on liquid crystals and cellulose nanocrystals
    Journal of Molecular Liquids, 323, 115065 (2021)

2020

  1. N. Bielejewska, R. Hertmanowski
    Functionalization of LC molecular films with nanocrystalline cellulose: A study of the self-assembly processes and molecular stability
    Colloids and Surfaces B: Biointerfaces 187, 110634 (2020)
  2. S. Pieprzyk, A.C. Brańka, D.M. Heyes, M.N. Bannerman
    A comprehensive study of the thermal conductivity of the hard sphere fluid and solid by molecular dynamics simulation
    Phys. Chem. Chem. Phys. 22, 8834 (2020)
  3. N. Bielejewska, A.C. Brańka, S. Pieprzyk, T. Yevchenko
    Another Look at Auxeticity of 2D Square Media
    Physica Status Solidi B, 257, 2000485 (2020)
  4. S. Lalik, A. Deptuch, T. Jaworska-Goła, P. Fryń, D. Dardas, O. Stefańczyk, M. Urbańska, M. Marzec
    Modification of AFLC Physical Properties by Doping with BaTiO3 Particles
    Journal of Physical Chemistry B 124, 6055-6073 (2020)
  5. S. Pieprzyk, A.C. Brańka, S.B. Yuste, A. Santos, M. Lopez de Haro
    Structural properties of additive binary hard-sphere mixtures
    Physical Review E 101, 012117 (2020)

2019

  1. S. Lalik, A. Deptuch, P. Fryń, T. Jaworska–Gołąb, D. Dardas, D. Pociecha, M. Urbańska, M. Tykarska, M. Marzec
    Systematic study of the chiral smectic phases of a fluorinated compound
    Liquid Crystals (2019) - online: 03 Jun 2019
  2. K. Nowicka, W. Kuczyński
    Angular dependence of the linear and nonlinear electro-optic responses in a polar smectic liquid crystal
    Liquid Crystals 46, 977 (2019)
  3. S. Pieprzyk, M.N. Bannerman, A.C. Brańka, M. Chudak, D.M. Heyes
    Thermodynamic and dynamical properties of the hard sphere system revisited by molecular dynamics simulation
    Phys. Chem. Chem. Phys. 21, 6886 (2019)
  4. Dorota Dardas
    Tuning the electro-optic and viscoelastic properties of ferroelectric liquid crystalline materials
    Rheologica Acta 58, 193 (2019)

2018

  1. W. Jeżewski
    Aggregation and fragmentation in liquids with dispersed nanoparticles
    Phys. Chem. Chem. Phys. 20, 18879 (2018)
  2. K. Nowicka, N. Bielejewska
    Third-order nonlinear electro-optic measurements in the smectic smectic-C∗α phase
    Phase Transitions 91, 151 (2018)
  3. S. Pieprzyk, A.C. Brańka, Sz. Maćkowiak, D.M. Heyes
    Comprehensive representation of the Lennard-Jones equation of state based on molecular dynamics simulation data
    Journal of Chemical Physics 148, 114505 (2018)
  4. A.C. Brańka, S. Pieprzyk, D.M. Heyes
    Thermodynamic curvature of soft-sphere fluids and solids Phys. Rev. E 97, 022119 (2018)

2017

  1. I. Śliwa, W. Jeżewski, A.V. Zakharov
    Local structural ordering in surface-confined liquid crystals
    Journal of Chemical Physics, 146, 24, 244704 (2017)
  2. I. Śliwa, A.V. Zakharov
    Diffusion processes in freely suspended smectic films
    Physics of The Solid State, 59, 8, 1648-1655 (2017)
  3. P. Perkowski, W. Kuczynski, K. Roleder
    Editorial Note
    Phase Transitions, 90, 8, SI, 763-764 (2017)
  4. M. Knapkiewicz, M. Sądej, W. Kuczyński, A. Rachocki
    Effect of polymer network on thermodynamic stability and switching behavior of the smectic-C∗α phase
    Physical Review E 96, 052702 (2017)
  5. Sz. Maćkowiak, D.M. Heyes, S. Pieprzyk, D. Dini, A.C. Brańka
    Non-Equilibrium Phase Behavior of Confined Molecular Films at Low Shear Rates
    Physica Status Solidi B, 1600862, (2017)
  6. D.M. Heyes, D. Dini, E.R. Smith, A.C. Brańka
    Nanowire Stretching by Non-Equilibrium Molecular Dynamics
    Physica Status Solidi B, 1600861, (2017)
  7. Sz. Maćkowiak, S. Pieprzyk, A.C. Brańka, D.M. Heyes
    A Nosé-Hoover Thermostat Adapted to a Slab Geometry
    Computational Methods in Science and Technology  23 (3), 211 (2017)
  8. K. Nowicka, M. Piosik, W. Kuczyński, A.C. Brańka
    Improvement of the blue phase stability in chiral nematic liquid crystal mixtures
    Phase Transitions 90, 95-98 (2017)
  9. S. Pieprzyk, A.C. Brańka, D.M. Heyes
    Representation of the direct correlation function of the hard-sphere fluid
    Phys. Rev. E 95, 062104 (2017)
  10. I. Śliwa, A.V. Zakharov
    Translational diffusion across a free-standing smectic film above the bulk smectic-A–isotropic transition temperature
    Phys. Rev. E 95, 012704 (2017)
  11. I. Śliwa, A.V. Zakharov
    Диффузионные процессы в свободно подвешенных смектических пленках
    Fizika Tverdogo Tela 59, 1624 (2017)

2016

  1. N. Bielejewska
    Orientational order of spme liquid crystal/dye mixtures obtained from optical birefringence
    Phase Transitions 89, p.359-367 (2016)
  2. D. Dardas
    Electro-optic and viscoelastic properties of a ferroelectric liquid crystalline binary mixture
    Phase Transitions 89, p.368-375 (2016)
  3. I. Niezgoda, E. Szypszak, D. Dardas, Z. Galewski
    Influence of the ester chain length on the mesogenic behavior and optical anisotropy of 4-[[4-(butoxy)phenyl]phenyl alkanoates
    Phase Transitions 89, p.393-402 (2016)
  4. A. Dłubacz, M. Marzec, D. Dardas, M. Żurowska
    New antiferroelectric liquid crystal for use in LCD
    Phase Transitions 89, p. 349-358 (2016)
  5. Dominika Janiszewska, Iwona Frąckowiak, Natalia Bielejewska
    Application of Selected Agents for Wood Liquefaction and Some Properties of Particleboards Produced wit the Use of Liquefied Wood
    DOI: 10.12841/wood.1644-3985.C37.01 Wood. Research Papers, Reports, Announcements, 59, 197, 223-230 (2016)
  6. M. Bielejewski, K. Nowicka, N. Bielejewska, J. Tritt-Goc
    Ionic Conductivity and Thermal Properties of a Supramolecular Ionogel Made from a Sugar-Based Low Molecular Weight Gelator and a Quaternary Ammonium Salt Electrolyte Solution
    Fournal of the Electrochemical Society, 163 (13), G187-G195 (2016)
  7. K. Nowicka, W. Kuczyński
    Non-linear electro-optical effects in the study of the helical smectic liquid crystals
    Phase Transitions 89, p. 376-382 (2016)
  8. I. Śliwa, W. Jeżewski, A.V. Zakharov
    The effect of surfaces on molecular ordering in thin liquid-crystal systems
    Journal of Chemical Physics 145, 084905 (2016)
  9. D.M. Heyes, G. Rickayzen, S. Pieprzyk, A.C. Brańka
    The second virial coefficient and critical point behavior of the Mie Potential
    Journal of Chemical Physics 145, 084505 (2016)
  10. K. Nowicka, M. Knapkiewicz, N. Bielejewska, D. Dardas, W. Kuczyński, J. Hoffmann
    Application of second-harmonic electro-optical measurements in the study of polar liquid crystal phases
    Liquid Crystals, 43, no. 12, 1778–1783 (2016)
  11. W. Jeżewski
    Effect of long-range interactions on nanoparticle-induced aggregation
    Phys. Chem. Chem. Phys. 18, 22929 (2016)
  12. I. Śliwa, W. Jeżewski, W. Kuczyński
    Electric-field-induced weakly chaotic transients in ferroelectric liquid crystals
    Phys. Rev. E 93, 012702 (2016)
  13. K. Nowicka
    Linear and non-linear electro-optical measurements in the study of polar liquid crystal phases
    Liquid Crystals 43, p.1276-1281 (2016)
  14. Sz. Maćkowiak, D.M. Heyes, D. Dini, A.C. Brańka
    Non-equilibrium phase behavior and friction of confined molecular films under shear: A non-equilibrium molecular dynamics study
    Journal of Chemical Physics 145, 164704 (2016)
  15. I. Śliwa
    Optical reflectance in free-standing smectic films, Chemical
    Physics Letters 648, 36, 2016
  16. S. Pieprzyk, D.M. Heyes, A.C. Brańka
    Spatially dependent diffusion coefficient as a model for pH sensitive microgel particles in microchannels
    Biomicrofluidics 10, 054118 (2016)
  17. I. Śliwa, A.A. Vakulenko, A.V. Zakharov
    Squeezing-out dynamics in free-standing smectic films
    Physics Letters A 380, 1811-1816 (2016)
  18. Natalia Bielejewska, Dominika Janiszewska
    The Spectral Analysis of Absorption and Fluorescence Parameters of Liquefied Wood Treated with Different Solvents
    Ann. WULS - SGGW, Forestry and Wood Technol., 94, 304-307 ISSN, 1898-5912 (2016)
  19. I. Śliwa, A.V. Zakharov, A.A. Vakulenko
    Динамика послойного утоньшения свободно подвешенных смектических пленок
    Fizika Tverdogo Tela 58, 1419 (2016)
    Dynamics of layer-by-layer thinning of free-standing smectic films
    Physics of the Solid State 58, 7, 1469-1475 (2016)

2015

  1. I. Śliwa, A.V. Zakharov
    Surface tension, disjoining pressure and layer compression of free-standing smectic films in water
    Chem. Phys. Lett. 620, 98 (2015)
  2. S. Pieprzyk, D.M. Heyes, Sz. Maćkowiak, A.C. Brańka
    Galilean-invariant Nosé-Hoover-type thermostats
    Phys. Rev. E 91, 033312 (2015)
  3. A.V. Zakharov, I. Śliwa
    Squeezing-out dynamics in free-standing smectic films
    J. Chem. Phys. 142, 214703 (2015)
  4. D.M. Heyes, A.C. Brańka
    The Lennard-Jones melting line and isomorphism
    J. Chem. Phys. 143, 234504 (2015)
  5. W. Kuczyński, J. Hoffmann, D. Dardas, K. Nowicka, N. Bielejewska
    Flexo- and piezo-electric polarization of smectic layers in ferroelectric and antiferroelectric liquid crystals
    Appl. Phys. Lett. 107, 191908 (2015)
  6. W. Jeżewski
    Kinnetics of aggregation in liquids with dispersed nanoparticles
    Phys. Chem. Chem. Phys. 17, 8828 (2015)
  7. D.M. Heyes, D. Dini, A.C. Brańka
    Scaling of Lennard-Jones liquid elastic moduli, viscoelasticity and other properties along fluid-solid coexistence
    Phys. Status Solidi B 252, No 7, 1514 (2015)
  8. D.M. Heyes, P. Turner, R.J. English, R. Williams, A.C. Brańka
    Second virial coefficient of rod-shaped molecules and molecular dynamics simulations of the isotropic phase
    Phys. Rev. E 91, 042134 (2015)

2014

  1. C. Gattinoni, Sz. Maćkowiak, D.M. Heyes, A.C. Brańka, D. Dini
    Boundary-controlled barostats for slab geometries in molecular dynamics simulations
    Phys. Rev. E 90, 043302 (2014)
  2. K. Nowicka, D. Dardas, W. Kuczyński, V.A. Belyakov, D.V. Shmeliova
    Director distribution and surface anchoring potential in Grandjean-Cano wedge
    Liquid Crystals, 41, 1448-1454, 2014
  3. J. Hoffmann, K. Nowicka, W. Kuczyński, N. Bielejewska
    Experimental Evidence of the Soft Mode in Smectic Ca* phase of  chiral ferroelectric liquid crystals
    Soft Matter, 2014, 10, 8548
  4. K. Nowicka, N. Bielejewska, W. Kuczyński, M. Knapkiewicz, J. Hoffmann
    Exploration of liquid crystal structures using fluorescent confocal polarizing microscopy
    Phase Transitions, 2014, http://dx.doi.org/10.1080/01411594.2014.953950
  5. K. Nowicka
    A reliable method for detecting phase transitions in liquid crystals with polar order
    Liquid Crystals 41, 197-201 (2014)
  6. K. Nowicka, N. Bielejewska, J. Hoffmann, W. Kuczyński
    Nonlinear electro-optical spectroscopy of liquid crystals possesing polar order
    Phase Transitions 87, 770-776 (2014)
  7. S. Pieprzyk, D.M. Heyes, A.C. Brańka
    Thermodynamic properties and entropy scaling law for diffusivity in soft spheres
    Physical Review E 90, 012106, 2014
  8. W. Jeżewski
    Complex superstructures in chiral liquid crystals: surface-induced helix destruction
    Physical Review E 89, 032501, 2014

2013

  1. K. Nowicka, D. Dardas, K. Garbat
    High permittivity of chiral tilted smectic phases in a binary mixture
    Phase Transitions, 86(2-3), 153 (2013)
  2. D. Dardas, K. Nowicka, W. Kuczyński
    Examination if three new fluorinated tilted smectics
    Phase Transitions, 86(2-3), 147 (2013)
  3. M. Iwamoto, I. Śliwa, A.A. Vakulenko, A.V. Zakharov
    Field-induced dependence of rotational diffusion processes in smectic films deposited on a solid surface
    Chem. Phys. Lett. 566 (2013), 32-37
  4. W. Jeżewski, I. Śliwa, W. Kuczyński
    Strongly nonlinear dynamics of ferroelectric liquid crystals
    The European Physical Journal E 36, 2, 2013

2012

  1. W. Kuczyński, D. Dardas, J. Hoffmann, K. Nowicka, W. Jeżewski
    Comparison of methods for determination of viscoelastic properties in chiral smectics C*
    Phase Trans. 85, 358-363 (2012)
  2. I. Śliwa, W. Wanarski
    Model of temperature dependence of spontaneous polarization of thiourea monocrystal in phase I
    Acta Physica Polonica A 122, 184 (2012)
  3. W. Jeżewski
    Effect of intralayer inhomogeneity on helical superstructures of liquid crystals
    Physical Review E 85, 051702 (2012)
  4. I. Śliwa, W. Jeżewski, W. Kuczyński, J. Hoffmann
    Solitons in surface stabilized ferroelectric liquid crystals and the determination of the twist elastic constant
    Phase Trans. 85, 345-352 (2012)
  5. M. Iwamoto, I. Śliwa, A.V. Zakharov
    Field-induced dependence of anchoring energy and surface tension in smectic liquid crystal films deposited on a solid surface
    Chemical Physics Letters 534, 23 (2012)
  6. I. Śliwa, K. Grygiel
    Periodic orbits, basins of attraction and chaotic beats in two coupled Kerr oscillators
    Nonl. Dynamics 67, 755-765 (2012)

2011

  1. A. Modlińska, D. Dardas, J. Jadżyn, D. Bauman
    Characterization of some fluorinated mesogens for application in liquid crystal displays.
    Mol. Cryst. Liq. Crystals 542, 28-36, 2011
  2. I. Śliwa, W. Wanarski
    The model of ferroelectricity in thiourea,
    Acta Physica Polonica A 120, 516 (2011)
  3. M. Geppi, A. Marini, B. Mennucci, P. Kula, A. Spadło, W. Kuczyński, S. Urban
    Determination of order parameters in lateralny fluorosubstituted terphenyls by 19F-NMR, optical and dielectric anisotropies,
    Mol. Cryst. Liq. Crystals  541,  104 (2011)
  4. W. Kuczyński, K. Nowicka, D. Dardas, W. Jeżewski, J. Hoffmann
    Determination of viscoelastic properties in a chiral smectic C liquid using different methods,
    Mol. Cryst. Liq. Crystals  544,  65 (2011)
  5. K. Pogorzelec-Glaser, A. Pietraszko, J. Baran, B. Hilczer, J. Małecki, M. Połomska, P. Ławniczak
    Structure and molecular dynamics of bis-1H-1,2,4-triazole succinic acid complex crystals
    CrystEngComm 13, 3698-3709, 2011
  6. D. Dardas, W. Kuczyński, J. Hoffmann, W. Jeżewski
    Determination of twist elastic constant in antiferroelectric liquid crystals,
    Measurement Science and Technology 22, 085707 (2011)
  7. W. Jeżewski, W. Kuczyński, J. Hoffmann
    Solitons induced by alternating electric fields in surface-stabilized ferroelectric liquid crystals,
    Physical Review E 83, 042701 (2011)

2010

  1. W. Jeżewski, W. Kuczyński, D. Dardas, K. Nowicka, J. Hoffmann
    Field-induced dynamics of ferroelectric liquid crystals with elastic interfacial confinement.
    Soft Matter 6, 2786-2792, 2010
  2. W. Kuczyński
    Behavior of the helix in some chiral smectic-C* liquid crystals.
    Physical Review E 81, 021708, 2010
  3. W. Kuczyński, K. Nowicka, D. Dardas, W. Jeżewski, J. Hoffmann
    Determination of bulk values of twist elasticity coefiicient in a chiral smectic C* liquid crystal.
    Opto-Electronics Review 18(2), 176-180, 2010

2009

  1. W. Jeżewski, W. Kuczyński
    Defect dynamics in ferroelectric liquid crystals of the chevron structure.
    Physical Review B 79, 214206, 2009
  2. W. Kuczyński, D. Dardas, K. Nowicka
    Determination of the bulk rotational viscosity coefficient in a  chiral smectic C* liquid crystal.
    Phase Transitions Vol. 82, No. 6, 444-451, 2009
  3. D. Dardas, W. Kuczyński, J. Hoffmann, W. Jeżewski, K. Nowicka, J. Małecki
    Non-linear electrooptic effect in antiferroelectric liquid crystal.
    Opto-Electronics Review 17(1), 25-29, 2009
  4. I. Śliwa, P. Szlachetka, K. Grygiel
    Coexisting solutions and their chaotic neighborhood in the dynamical systems of nonlinear optics.
    Nonlinear Dynamics 57, 143-156, 2009
  5. K. Żygadło, D. Dardas, K. Nowicka, J. Hoffmann, Z. Galewski
    Liquid-crystalline polymorphism of symmetrial azobananas: bis)4-(4-alkylphenyl)azopheny) 2-nitroisophtalates.
    Molecular Cryststals and Liquid Crystals, vol. 509, 283-291, 2009
  6. S. Borsacchi, L. Calucci, J. Czub, R. Dąbrowski, M. Geppi, W. Kuczyński, A. Marini, B. Mennucci, S. Urban
    Orientational order of fluorinated mesogens containing 1,3,2-dioxaborinane ring: A multidisciplinary approch.
    Journal of Physical Chemistry B 15783-15794 (2009)
  7. W. Jeżewski, K.W. Wojciechowski
    Nonlinear dielectric relaxation in the isotropic phase and mesophases of cholesteryl oleyl carbonate.
    Journal of Physical Chemistry B 113, 9123-9128, 2009
  8. M. Heyes, S.M. Clarke and A.C. Brańka
    Soft-sphere soft glasses.
    Journal of Chemical Physics 131, 204506, 2009

2008

  1. W. Jeżewski, W. Kuczyński, J. Hoffmann
    Creep dynamics of structural defects in ferroelectric liquid crystals with chevron geometry.
    Physical Review B 77, 094101, 2008
  2. W. Jeżewski, W. Kuczyński, J. Hoffmann, D. Dardas
    Comarison of dielectric and optical responses of chevron ferroeelctric liquid crystals.
    Opto-Electronic Review 16(3), 282-286, 2008
  3. V.A. Belyakov, W. Kuczyński
    Motion of nonsigular walls in plane layer of twisted nematics.
    Molecular Crystals and Liquid Crystals Vol. 480, 243-261, 2008
  4. M. Geppi, A. Marini, C.A. Veracini, S. Urban, J. Czub, W. Kuczyński, R. Dąbrowski
    Orientational order of difluorinated liquid crystals: a comparative 13C-NMR, optical, and dielectric study in nematic and smectic B phases.
    Journal of Physical Chemistry B 112, 9663-9676, 2008

2007

  1. W. Jeżewski
    On the emergence of scaling in weighted networks.
    Physica A 379, 691-700, 2007
  2. J. Hoffmann, F. Giesselmann, W. Kuczyński
    Experimental evidence of the electric-field induced critical behaviour of the smectic C* - alpha phase.
    Phase Transitions Vol. 80, No. 8, 841-849, 2007
  3. W. Jeżewski, W. Kuczyński, J. Hoffmann
    Dielectric versus optical response in chevron ferroelectric liquid crystals.
    Liquid Crystals 34, 1299-1306 (2007)

2006

  1. W. Jeżewski, W. Kuczyński, J. Hoffmann
    Dielectric relaxation in chevron surface stabilized ferroelectric liquid crystals.
    Physical Review E 73, 061702, 2006
  2. D. Dardas, W. Kuczyński, J. Hoffmann
    Measurements of absolute values of electrooptic coefficients in a ferroelectric liquid crystal.
    Phase Transitions Vol. 79, No. 3, 213-222, 2006
  3. P. Zugenmaier, W. Kuczyński
    Comparison of the crystal and molecular structures of three similar 4-heptyl-biphenyl compounds: 4-heptyl-4’-cyanobiphenyl, 4-heptyl-3’-cyanobiphenyl, and 4-heptyl-4’-nitrobiphenyl.
    Molecular Crystals and Liquid Crystals Vol. 457, p. 93-103, 2006
  4. J.A. Małecki, J. Nowak
    Dielectric studies of molecular interactions in benzene solutions of 4-heptyl-4’-nitro-biphenyl.
    Journal of Molecular Liquids 129, 164-168, 2006
  5. M.B. Pandey, R. Dhar, W. Kuczyński
    Dielectric Investigations of induced twist grain boundary phase in the binary mixtures of cholesterol benzoate and di-heptyloxyazoxybenzene.
    Ferroelectrics, 343, 69-82, 2006
  6. F .Goc, Ch. Blanc, V. Lorman, M. Nobili, S. Samaritani, G. Galli, W. Kuczyński
    X-ray and electrooptical studies of liquid crystal siloxane with a de vries SmA* phase.
    Ferroelectrics, 343, 101-110, 2006

2005

  1. W. Kuczyński, J. Hoffmann
    Determination of piezoelectric and flexoelectric polarization in ferroelectric liquid crystals.
    Physical Review E 72, 041701-1 do 041701-6, 2005
  2. W. Jeżewski
    Scale-free properties of weghted networks with connectivity-driven topology.
    Physica A 354, 2005, 672-680
  3. V.A. Belyakov, W. Kuczyński
    Surface anchoring and twisting of thin nematic layers influenced by thermal fluctuations.
    Molecular Crystals and Liquid Crystals 438, 123[1687]-140[1704], 2005

2004

  1. J.A. Małecki
    Phenomenological model of nonlinear dielectric losses related to the intrinsic conductivity of dielectrics
    The European Physical Journal B 39, 235-240 (2004)
  2. J.A. Małecki
    Nonlinear dielectric losses and dynamics of intrinsic conductivity of dielectrics in “Nonlinear Dielectric Phenomena in Complex Liquids” eds. S.J.Rzoska and V.P.Zhelezny
    Kluwer Academic Publishers, 77-88 (2004)
  3. J. Hoffmann
    Extension of Maier-Meier Model on Cholesteric Liquid Crystals
    Acta Physica Polonica A, 105, 373-381 (2004)
  4. W. Jeżewski
    Scaling in weighted networks and complex systems
    Physica A 337, 336-356 (2004)
  5. D. Dardas, W. Kuczyński
    Non-linear electrooptical effects in chiral liquid crystals
    Opto-Electronics Review 12(3), 277-280 (2004)

2003

  1. W. Kuczyński, J. Małecki
    Dielectric Relaxation in Liquid Crystal Phases with Polar Order
    Ferroelectrics , 296, 1-15 (2003)
  2. W. Kuczyński
    Przejścia fazowe w ciekłych kryształach
    Przemiany fazowe, A. Graja, A.R. Ferchmin (Eds.) Ośrodek Wydawnictw Naukowych OWN Poznań (2003), 65-77
  3. W. Kuczyński
    Electrooptical studies of relaxation processes in chiral smectic liquid crystals
    Relaxation Phenomena (Liquid Crystals, Magnetic Systems, Polymers, High-Tc Superconductors, Metalic Glasses) Eds. W. Haase, S. Wróbel, 422-444, Springer Verlag Berlin, Heidelberg, 2003)
  4. W. Kuczyński, F. Goc
    Metastable states in liquid-crystalline mixtures
    Liquid Crystals, 30 (6), 701-709 (2003)
  5. J. Hoffmann
    Determination of the Dielectric Anisotropy of Cholesteric Liquid Crystals
    Acta Physica Polonica A, 103, 41-46 (2003)
  6. S. Urban, B. Gestblom, W. Kuczyński, S. Pawlus, A. Würflinger
    Nematic order parameter as determined from dielectric relaxation data and other methods
    Phys, Chem. Chem. Phys. 5, 924-928 (2003)

2002

  1. W. Kuczyński, F. Goc, D. Dardas, R. Dąbrowski, J. Hoffmann, B. Stryła, J. Małecki
    Phase transitions in a liquid crystal with long-range dipole order
    Ferroelectrics, 274, 83-100 (2002)
  2. J. Małecki, J. Nowak
    Linear and Nonlinear Dielectric Properties of 4-Heptyl-4’-Cyano-biphenyl Solutions in Benzene
    Polish J. Chem., 76, 435 (2002)
  3. W. Jeżewski
    Stationary and nonstationary properties of evolving networks with preferential linkage
    Phys. Rev. E 66, 067102 1-4 (2002)
  4. W. Jeżewski
    Singularity spectra of strongly inhomogeneous multifractals
    Eur. Phys. J. B 26, 473-478 (2002)
  5. W. Kuczyński, B. Żywucki, J. Małecki
    Determination of orientational order parameter in various liquid-crystalline phases
    Mol. Cryst. Liq. Cryst., 381, 1-19 (2002)

2001

  1. W. Kuczyński, F. Goc, R. Dąbrowski
    Kinetics of the transition between ferroelectric and antiferroelectric states in liquid-crystalline mixtures
    Mol. Cryst. Liq. Cryst., 366, 771-784 (2001)
  2. J. Małecki
    Dynamics of the Radiation-induced Conductivity in Presence of Spatial Charge
    J. Electrostatics, 50/2, 109 (2001)
  3. W. Jeżewski
    Multiscaling and multifractality in an one-dimensional Ising model
    Eur. Phys. J. B 19, 133-138 (2001)
  4. W. Jeżewski
    Complex multifractal measures and a generalized multifractal formalism
    Physica A 298, 419-430 (2001)
  5. R. Dąbrowski, W. Drzewiński, K. Czupryński, S. Gauza, K. Kenig, W. Kuczyński, F. Goc
    Systems with enhanced antiferroelectric phase. Phase diagrams, dielectric and electro-optic studies
    Mol. Cryst. Liq. Cryst., 365, 199-211 (2001)
  6. S. Gauza, K. Czupryński, R. Dąbrowski, W. Kuczyński, D. Pociecha
    Bicomponent system with induced antiferroelectric SmCA* phase
    Mol. Cryst. Liq. Cryst., 365, 189-198 (2001)

Staff

Head of group

The group

Notable former group members

  • Prof. Dr. hab. Jan Jadżyn

  • M. Sc. Grzegorz Czechowski

Research

Liquids

  • viscous properties of the hydrogen-bonded systems;
  • static and dynamic dielectric properties of the high conducting liquids;
  • studies of the dynamics of molecular interactions by nonlinear dielectric spectroscopy.

Liquid crystals

  • kinetics of the mesogens aggregation (nonlinear dielectric spectroscopy);
  • molecular dynamics in the different liquid crystalline phases (linear dielectric spectroscopy);
  • elastic properties of nematics.

Supramolecular polymers

Subcategories