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Št. zadetkov: 5
Diffraction gratings formed by bent-core liquid crystals in the twist-bend nematic phase
Muhammad Ali, Nataša Vaupotič, Damian Pociecha
Doktorska disertacija
Oznake: bent-dimer liquid crystals;twist-bend nematic phase;undulation of pseudo-layers;polarization;diffraction grating;beam peopagation method;transfer matrix method;dissertations;
In this thesis, we study the structure and optical transmission properties of the twist-bend nematic liquid crystalline phase, made of bent dimers, confined in thin planar cells. Confinement leads to the formation of a periodic modulated structure, the formation of which is explained as follows. The ...
Leto: 2021 Vir: Fakulteta za naravoslovje in matematiko (UM FNM)
Modeling of the resonant X-ray response of a chiral cubic phase
Timon Grabovac, Ewa Górecka, Damian Pociecha, Nataša Vaupotič
Izvirni znanstveni članek
Oznake: chiral cubic phase;resonant X-ray scattering;theoretical modeling;tensor form factor;
The structure of a continuous-grid chiral cubic phase made of achiral constituent molecules is a hot topic in the field of thermotropic liquid crystals. Several structural models have been proposed so far. Resonant X-ray scattering (RXS), which gives information on the molecular orientation in the u ...
Leto: 2021 Vir: Fakulteta za naravoslovje in matematiko (UM FNM)
Unmasking the structure of a chiral cubic thermotropic liquid crystal phase by a combination of soft and tender resonant X-ray scattering
Timon Grabovac, Ewa Górecka, Chenhui Zhu, Damian Pociecha, Nataša Vaupotič
Izvirni znanstveni članek
Oznake: resonant X-ray scattering;chiral cubic thermotropic liquid crystal phase;structural models;carbon absorption edge;sulphur absorption edge;
A resonant X-ray scattering response for two structural models of a chiral cubic phase with a giant unit cell, one composed of a continuous grid and micelles and the other with three continuous grids, is studied theoretically and compared to experimental measurements. For both structural models reso ...
Leto: 2022 Vir: Fakulteta za naravoslovje in matematiko (UM FNM)
Interpretation of dielectric spectroscopy measurements of ferroelectric nematic liquid crystals
Vojko Matko, Ewa Górecka, Damian Pociecha, Joanna Matraszek, Nataša Vaupotič
Izvirni znanstveni članek
Oznake: liquid crystals;statistical physics;
The magnitude of the relative permittivity of the ferroelectric nematic phase (NF ) has been the subject of lively scientific discussion since the phase was recently discovered. Dielectric spectroscopy measurements (DSMs) give a huge value of relative permittivity, which depends on the cell thickn ...
Leto: 2024 Vir: Fakulteta za elektrotehniko, računalništvo in informatiko (UM FERI)
Photonic bandgap in achiral liquid crystals - a twist on a twist
Damian Pociecha, Nataša Vaupotič, Magdalena Majewska, Ewan Cruickshank, Rebecca Walker, John M. D. Storey, Corrie T. Imrie, Cheng Wang, Ewa Górecka
Izvirni znanstveni članek
Oznake: chirality;helical structures;liquid crystals;photonic bandgap;twist–bend phases;
Achiral mesogenic molecules are shown to be able to spontaneously assemble into liquid crystalline smectic phases having either simple or double-helical structures. At the transition between these phases, the double-helical structure unwinds. As a consequence, in some temperature range, the pitch of ...
Leto: 2021 Vir: Fakulteta za naravoslovje in matematiko (UM FNM)
Št. zadetkov: 5
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