Browsing Ústav fyziky by Issue Date
Now showing items 1-20 of 67
-
Scanning proximal microscopy study of the thin layers of silicon carbide aluminum nitride solid solution manufactured by fast sublimation epitaxy
(EDP Sciences, 2013-05-03)The objective of the study is a growth of SiC/(SiC)1-x(AlN)x structures by fast sublimation epitaxy of the polycrystalline source of (SiC)1-x(AlN)x and their characterisation by proximal scanning electron microscopy and ... -
Microscopic optoelectronic defectoscopy of solar cells
(EDP Sciences, 2013-05-03)Scanning probe microscopes are powerful tool for micro- or nanoscale diagnostics of defects in crystalline silicon solar cells. Solar cell is a large p-n junction semiconductor device. Its quality is strongly damaged by ... -
P1-approximation for radiative transfer: application to SF6 + Cu arc plasmas
(De Gruyter Open, 2014-12-01)The objective of the paper consists of a theoretical prediction of radiative heat transfer in arc plasmas of SF6 (sulphur hexafluoride) with various admixtures of copper vapours. As a mathematical tool the P1-approximation ... -
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 ... -
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 ... -
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. -
Novel Algorithm in Activation Process of GPON Network
(Croatian Communications and Information Society, 2016-02-17)Passive optical networks are dominating access networks around the world due to its their economical aspect, bandwidth, and penetration. It is necessary to deal with specification of these networks. -
Visualization Tool for Control Signalling in NG-PON2
(Croatian Communications and Information Society, 2016-07-01)Požadavky uživatelů na kvalitu připojení k Internetu a služeb nutí poskytovatelé služeb a technické komunity, navrhnout a zavést nové technologie, které mohou reagovat na tuto požadavky. Nejslibnější řešení v tomto ohledu ... -
Current-fluctuation measurements of amperometric gas sensors prepared by three different technology procedures
(Polish Academy of Sciences, 2016-12-13)The paper focuses on usage of noise measurement (electric current-fluctuation measurement) for evaluation of electrochemical sensors which were prepared by different fabrication processes: (i) lift-off and drop-casting ... -
Numerically optimized band boundaries of Planck mean absorption coefficients in air plasma
(IOP Publishing, 2017-08-02)Radiation heat transfer plays an important role in the energy balance of plasma in an electric arc and its accurate prediction is essential for the development of new electrical devices. Unfortunately, a very complex ... -
PROGRAM PROCESSING DATABASE DATA FOR CALCULATION OF SPECTRAL LINES WIDTH AND SHIFT IN PLASMA
(ČVUT, 2017-09-04)Electric and magnetic fields cause splitting of energy levels in an atom. Transition of electrons among these levels could be seen as broadening and shift of spectral lines. We recognize various types of effects, the most ... -
Fractal Analysis of the 3-D surface Topography of GaAs Solar Cells
(DEStech Publications, Inc., 2018-02-11)This article is devoted to study of Atomic Force Microscopy (AFM) images of solar cells based on gallium arsenide (GaAs). Mathematical processing of data involves obtaining additional information about topography. The ... -
Characterization of nanoblisters on HOPG surface
(De Gruyter OPEN, 2019-08-07)We report on influence of the surface functionalization on the properties of highly oriented pyrolytic graphite. The samples were processed in nitric acid and characterized by XPS, Raman and EDX spectroscopies, AFM, SEM ... -
Synthesis of high density sub-10 µm (Ba0.85Ca0.15) (Zr0.1Ti0.9)O3-xCeO2 lead-free ceramics using a twostep sintering technique
(TAYLOR & FRANCIS LTD, 2019-10-29)(Ba0.85Ca0.15)(Zr0.1Ti0.9)O3-xCeO2, (BCZTCe) lead-free piezoelectric ceramics were processed conventionally using a two-step sintering technique. The results suggest that two-step sintering is an effective technique to ... -
Polymer Graphite Pencil Lead as a Cheap Alternative for Classic Conductive SPM Probes
(MDPI, 2019-12-10)This paper presents polymer graphite (PG) as a novel material for the scanning tunneling microscopy (STM) probe. Conductive PG is a relatively modern nanocomposite material used for micro-pencil rells containing a polymer-based ... -
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 ... -
The Effect of the Orientation Towards Analyte Flow on Electrochemical Sensor Performance and Current Fluctuations
(MDPI, 2020-02-14)Analyte flow influences the performance of every gas sensor; thus, most of these sensors usually contain a diffusion barrier (layer, cover, inlet) that can prevent the negative impact of a sudden change of direction and/or ... -
Microstructural investigation of defects in photovoltaic cells by the electron beam-induced current method
(Elsevier, 2020-02-19)This work aims to clarify the application of electron beam-induced current (EBIC) method for the morphological analysis and detection of local defects and impurities in semiconductor structures such as solar cells. One of ... -
Investigation of structure of AlN thin films using Fourier-transform infrared spectroscopy
(Elsevier, 2020-02-19)This study focuses on structural imperfections caused by hydrogen impurities in AlN thin films obtained using atomic layer deposition method (ALD). Currently, there is a severe lack of studies regarding the presence of ... -
Complementary SEM-AFM of Swelling Bi-Fe-O Film on HOPG Substrate
(MDPI, 2020-05-23)The objective of this work is to study the delamination of bismuth ferrite prepared by atomic layer deposition on highly oriented pyrolytic graphite (HOPG) substrate. The samples’ structures and compositions are provided ...