REPOSITORY > RESULTS

Interactions between macromolecules are the basic events of life. Their characterization is thus a key to understanding the physiology and the underlying specificity of these events. Not only understanding of the final states (where the molecules get closest together), also understanding of the course of approach is mandatory to gain …

Ion beam sputtering induces morphological as well as compositional changes on the surfaces of ion-sputtered substrates. The surface undergoes kinetic processes, which lead to different morphological details: periodic ripples, substrate-defined etch pits or protuberant structures, roughening and smoothing are some possibilities for surface evolution. The aim of my doctoral dissertation …

The thesis presents experimental studies of colloidal interactions and novel colloidal structures in confined nematic liquid crystal using optical tweezers. Liquid crystal colloids are a novel class of composite materials with well-controlled periodic structures in the nanometer and micrometer ranges. Moreover, they also posses novel mechanical, optical and rheological properties, …

he thesis describes a study of aluminum nitride (AlN) powder hydrolysis in the temperature range between 5 °C and 90 °C. The analysis of the temperature dependence of the course of the hydrolysis and the reaction kinetics, along with a mechanistic model set up for the hydrolysis reactions, gives a …

This thesis presents studies of ultrafast carrier relaxation dynamics in charge density wave (CDW) materials by means of femtosecond time-resolved optical spectroscopy. In these experiments, a femtosecond pump pulse excites electrons via interband transitions, thereby changing the optical properties of the material. The dynamics of relaxation processes is then recorded …

Our research focused on the formation of Ti40Zr40-xNi20Cux (x=3, 5), Ti45Zr38-xNi17Cux (x=3, 5), Ti53Zr27-xNi20Cux (x=3, 5) and Ti58Zr24-xNi18Cux (x=3, 5) icosahedral (i-phase) quasicrystals by three different techniques and their subsequent characterization and high-pressure hydrogenation. The quasicrystals of this system are thermodynamically stable and they have a relatively good affinity for …

The stress dependence of the electrical permittivity offers a convenient way of measuring pressure. This effect is suitable for static and quasi-static stress applications, where the conventional method based on the piezoelectric effect becomes inadequate. Although the principle of applying this effect for pressure sensing has been known for almost …

This PhD thesis presents experimental results from the synthesis, crystal structure and microwave dielectric characterization of BaO-rich phases within the BaO-Nb2O5 and BaONb2O5- WO3 system. I was primarily interested in two compounds with unknown crystal structure, i.e., the binary Ba4Nb2O9 and the ternary Ba6Nb2WO14, which lie on a common virtual …

The sterilization efficiency of oxygen plasma was studied. Plasma was created in pure oxygen with an inductively coupled radiofrequency discharge. The discharge power was estimated to about 180 W. Plasma parameters were measured with a double Langmuir probe and a catalytic probe. Plasma parameters depended on pressure in the discharge …

The possible mechanisms for destruction of two types of bacteria with oxygen radicals were studied. Samples consisting of standard ATCC strains of Gram – positive bacteria Staphylococcus aureus and Gram – negative bacteria Escherichia coli were obtained. Bacteria were cultivated according to the standard procedures and fixed on substrates of …