Ústav fyziky
Browse by
Recent Submissions
-
Interpretation of field emission current–voltage data: Background theory and detailed simulation testing of a user-friendly webtool
(Elsevier, 2022-05-19)In field electron emission (FE) studies, interpretation of measured current–voltage characteristics and extraction of emitter characterization parameters are usually carried out within the framework of “smooth planar ... -
Analysis of learning methods in the digital educational environment
(EDP Sciences, 2022-06-24)In this paper, modern ways of digitalization of the educational process are considered and analyzed. An alternative innovative solution can be a theory of inventive problem solving (TRIZ) a methodology, taking into account ... -
TRIZ already 35 years in the Czech Republic
(Elsevier B.V., 2016-02-10)In this paper the authors summarize the experience of teaching and implementation TRIZ at technical universities and findings from teaching and applications in companies in the Czech Republic and Slovakia for the last 35 years. -
Effect of extrusion process and various elongation ratios on the structural and dielectric properties of PVDF-based copolymer containing micro and nano-sized crystallites
(TANGER Ltd., 2021-07-11)In this contribution, the effect of the extrusion process of the poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-co-HFP) with the subsequent elongation/poling on its structural and dielectric properties is presented. ... -
The effects of molecular and processing parameters on energy harvesting capability of PVDF-based nanogenerators
(TANGER LTD, 2021-10-18)In the research of the alternative vibration sensing systems, the major potential is attributed to piezoelectric materials that can generate the electrical output from the waste vibration sources of the industrial machines. ... -
Triboelectric Response of Electrospun Stratified PVDF and PA Structures
(MDPI, 2022-01-22)Utilizing the triboelectric effect of the fibrous structure, a very low cost and straightforward sensor or an energy harvester can be obtained. A device of this kind can be flexible and, moreover, it can exhibit a better ... -
Water-Soluble Copper Ink for the Inkjet Fabrication of Flexible Electronic Components
(MDPI, 2021-04-26)The aim of this work is preparation and investigation of copper conductive paths by printing with a different type of functional ink. The solutions based on copper-containing complex compounds were used as inks instead of ... -
Crack resistance of bismuth ferrite films obtained on a flexible substrate
(EDP Sciences, 2021-07-26)Ultrathin BiOx and FeOx layers were obtained by Atomic Layer Deposition (ALD) on the surface of a flexible Kapton substrate (poly (4,4’-oxydiphenylene-pyromellitimide)) at a temperature of 250 °C. The layer thickness was ... -
Surface morphology and X-ray photoelectron spectroscopy of BiFeO3 thin films deposited on top of Ta2O5/Si layers
(EDP Sciences, 2021-07-26)In this study a comparison of the topography of BiFeO3 (BFO) thin films deposited on tantalum pentoxide substrates of different thicknesses is provided. The Ta2O5 substrates had a roughness increasing with the film thickness. ... -
Surface Analyses of PVDF/NMP/[EMIM][TFSI] Solid Polymer Electrolyte
(MDPI, 2021-08-11)Thermal treatment conditions of solid polymer polymer electrolyte (SPE) were studied with respect to their impact on the surface morphology, phase composition and chemical composition of an imidazolium ionic-liquid-based ... -
Characterization of GaAs Solar Cells under Supercontinuum Long-Time Illumination
(MDPI, 2021-01-19)This work is dedicated to the description of the degradation of GaAs solar cells under continuous laser irradiation. Constant and strong exposure of the solar cell was performed over two months. Time-dependent electrical ... -
Nanostructures for Achieving Selective Properties of a Thermophotovoltaic Emitter
(MDPI, 2021-08-19)This paper focuses on the research and development of a suitable method for creating a selective emitter for the visible and near-infrared region to be able to work optimally together with silicon photovoltaic cells in a ... -
Structure Tuning and Electrical Properties of Mixed PVDF and Nylon Nanofibers
(MDPI, 2021-10-15)The paper specifies the electrostatic spinning process of specific polymeric materials, such as polyvinylidene fluoride (PVDF), polyamide-6 (PA6, Nylon-6) and their combination PVDF/PA6. By combining nanofibers from two ... -
Stereometric analysis of Ta2O5 thin lms
(De Gruyter, 2020-01-27)The purpose of this work is the study of the correlation between the thickness of tantalum pentoxide thin lms and their three-dimensional (3D) micromorphology.The samples were prepared on silicon substrates by electron ... -
Morphological features in aluminum nitride epilayers prepared by magnetron sputtering
(De Gruyter Open, 2015-01-01)The aim of this study is to characterize the surface topography of aluminum nitride (AlN) epilayers prepared by magnetron sputtering using the surface statistical parameters, according to ISO 25178-2:2012. To understand ... -
Overview of the Current State of Gallium Arsenide-Based Solar Cells
(MDPI, 2021-06-04)As widely-available silicon solar cells, the development of GaAs-based solar cells has been ongoing for many years. Although cells on the gallium arsenide basis today achieve the highest efficiency of all, they are not ... -
On the Selection of Integration Intervals for the Calculation of Mean Absorption Coefficients
(Springer US, 2015-10-18)In radiation modeling of thermal plasmas non-grey models are applied where the radiative transport is described in several frequency bands (spectral intervals). Hereby mean absorption coefficients have to be calculated by ... -
SEM imaging and XPS characterization of doped PVDF fibers
(EDP Sciences, 2021-06-10)Polyvinylidene fluoride (PVDF) is one of the most promising electroactive polymers; it exhibits excellent electroactive behaviours, good biocompatibility, excellent chemical resistance, and thermal stability, rendering it ... -
Preparation of PVDF-CNT composite
(EDP Sciences, 2021-06-09)Limitations of ceramic piezomaterials (brittleness, toxicity of lead-containing samples, difficulties of complicated shapes preparations, etc.) call for the research in the field of piezoelectric polymers. One of them is ... -
Comparative Study of PVDF Sheets and Their Sensitivity to Mechanical Vibrations: The Role of Dimensions, Molecular Weight, Stretching and Poling
(MDPI, 2021-06-22)This paper is focused on the comparative study of the vibration sensing capabilities of poly(vinylidene fluoride) (PVDF) sheets. The main parameters such as molecular weight, initial sample thickness, stretching and poling ...
RSS 1.0