J. Zieliński
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View article: Positron-Positronium Converters in Reflection and Transmission Geometry for Gravitational Experiments with Antihydrogen using Moiré Deflectometry
Positron-Positronium Converters in Reflection and Transmission Geometry for Gravitational Experiments with Antihydrogen using Moiré Deflectometry Open
In the context of the Antihydrogen Experiment: Gravity, Interferometry, Spectroscopy (AEgIS) located at CERN, positron-positronium converters with a high positron-positronium conversion efficiency have been designed in both reflection and …
View article: Electric, Magnetic, Acoustic Properties and Viscosity of Liquid Crystals
Electric, Magnetic, Acoustic Properties and Viscosity of Liquid Crystals Open
In the paper, the viscosity and the electric, magnetic and acoustic properties of liquid crystals, especially nematics, are discussed.All these properties are very important for applications of liquid crystals, and all of them are anisotro…
View article: Optical properties of liquid crystals
Optical properties of liquid crystals Open
The paper presents the basic optical properties of liquid crystals. It focuses in particular on nematic and cholesteric liquidcrystals, which exhibit particularly interesting and practical optical properties. The article also briefly cover…
View article: Dielectric properties of liquid crystals
Dielectric properties of liquid crystals Open
In the paper, dielectric properties of liquid crystals, especially the nematic phase, arediscussed. An outline of the development of theories describing these properties is presented. Thestatic theory of dielectric permittivity of anisotro…
View article: Elastic properties of liquid crystals
Elastic properties of liquid crystals Open
The paper presents elastic properties of liquid crystals, especially their nematic phase. Anoutline of a development of theories describing these properties is given. The model describing liquidcrystal as continuous medium is formulated. T…
View article: Mesomorphic state and types of mesophases
Mesomorphic state and types of mesophases Open
The paper presents basic types of liquid-crystalline phases obtained in different ways and supermolecular arrangement in those phases. Characteristic features of molecular structure of mesogens are discussed, moreover their influence on li…
View article: Theories of mean molecular field for liquid crystalline state
Theories of mean molecular field for liquid crystalline state Open
Theories of a mean molecular field developed for nematic liquid crystals are discussed. Their advantages and disadvantages are highlighted. The role of the order parameter in the description of a liquid crystalline phase is shown. The role…
View article: History of the research of liquid crystals
History of the research of liquid crystals Open
A historical view of studies on liquid crystals is presented. Application of those materials are also taken into account. Special attention is paid to the studies conducted at Polish scientific centres since the thirties of the last centur…