Zobrazeno 1 - 10
of 24
pro vyhledávání: '"Tatiana Sergan"'
Autor:
Claire Meyer, Patrick Davidson, Tatiana Sergan, Vassili Sergan, Daniel Stoenescu, Anamarija Knežević, Irena Dokli, Andreja Lesac, Ivan Dozov
Publikováno v:
Liquid Crystals. 50:157-173
The synthesis of bent-shaped mesogens and mesogenic dimers has renewed the field of liquid crystals in many ways during the previous decades, for example, through the discovery of ‘exotic’ mesophases such as the twist-bend nematic phase and the b
Publikováno v:
Molecular Crystals and Liquid Crystals. 413:537-544
We studied the optical performance of reflective polarizers made of a fine grid of conducting wires. The polarizer reflects visible light polarized along the grids and transmits light polarized perpendicular to the grid with low losses. We show that
Publikováno v:
Molecular Crystals and Liquid Crystals. 409:21-28
An aqueous solution of disodium cromoglycate (cromolyn) is known to form the chromonic N phase (i.e. a nematic lyotropic columnar phase) at room temperature and concentration range 13–17%, and the corresponding N∗ twisted nematic phase if chiral
Publikováno v:
Molecular Crystals and Liquid Crystals. 409:153-162
Polymer films possessing negative birefringence are used for the compensation of residual positive birefringence of liquid crystal displays in order to improve their viewing characteristics. We present several types of materials suitable for the fabr
Publikováno v:
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals. 367:143-150
we studied the director configuration in thin liquid crystalline layers of 5 CB using a null ellipsometry technique. Liquid crystal (LC) material was spin- coated on polyimide (PI) substrates. The influence of different treatment of PI substrates on
Publikováno v:
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals. 365:415-426
The spatial orientational order of films of a series of LC polymalonates with 4-hexyloxy-4'-nitroazobenzene side groups which differ in the length of the alkylene spacer in the main chain are studied using null ellipsometry and UV/Vis spectroscopy. I
Publikováno v:
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals. 359:259-267
We studied a liquid crystalline compound of disk-like molecules that has a mesophase in the temperature range 104–180°C. The compound exhibits schlieren textures typical to the discoidal nematic phase within this temperature range. Chemical modifi
Publikováno v:
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals. 359:245-257
We studied the distribution of optic axis and alignment of discotic molecules in discotic films with one free surface. The ncmatic structure of the films was fixed by photo-polymerization of discotic monomers. The distribution of optic axis within th
Publikováno v:
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals. 359:301-313
We studied the 3D distribution of azobenzene fragments in the films of two comb-like liquid crystalline azopolymers before and after irradiation by actinic UV light using a null ellipsometry techni...
Light induced structures in liquid crystalline side-chain polymers with azobenzene functional groups
Publikováno v:
The Journal of Chemical Physics. 114:5330-5337
We applied ellipsometry to study the distribution of azobenzene fragments in the films of two types of comblike polymers with azobenzene moieties in the side chains before and after ultraviolet (UV) light irradiation. The polymer with an alkyl chain