Now showing items 1-20 of 42

  • Scanning proximal microscopy study of the thin layers of silicon carbide aluminum nitride solid solution manufactured by fast sublimation epitaxy 

    Sobola, Dinara; Korostylev, Evgenij; Bilalov, Bilal; Tománek, Pavel (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 

    Škarvada, Pavel; Tománek, Pavel; Koktavý, Pavel; Sobola, Dinara (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 

    Bogatyreva, Nadezda; Bartlová, Milada; Aubrecht, Vladimír; Holcman, Vladimír (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 ...
  • On the Selection of Integration Intervals for the Calculation of Mean Absorption Coefficients 

    Kloc, Petr; Aubrecht, Vladimír; Bartlová, Milada; Coufal, Oldřich; Rümpler, Christian (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 ...
  • Novel Algorithm in Activation Process of GPON Network 

    Horváth, Tomáš; Münster, Petr; Jurčík, Michal; Filka, Miloslav (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 

    Horváth, Tomáš; Jurčík, Michal (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 

    Sedlák, Petr; Kuberský, Petr; Škarvada, Pavel; Hamáček, Aleš; Sedláková, Vlasta; Majzner, Jiří; Nešpůrek, Stanislav; Šikula, Josef (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 

    Kloc, Petr; Aubrecht, Vladimír; Bartlová, Milada (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 

    Pokorný, Josef (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 

    Talu, Stefan; Papež, Nikola; Sobola, Dinara; Tofel, Pavel (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 

    Sobola, Dinara; Papež, Nikola; Dallaev, Rashid; Ramazanov, Shihgasan; Hemzal, Dušan; Holcman, Vladimír (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 

    Bijalwan, Vijay; Tofel, Pavel (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 

    Knápek, Alexandr; Sobola, Dinara; Burda, Daniel; Daňhel, Aleš; Mousa, Marwan; Kolařík, Vladimír (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 

    Sobola, Dinara; Kaspar, Pavel; Oulehla, Jindřich; Papež, Nikola (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 

    Sedlák, Petr; Kuberský, Petr (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 ...
  • Investigation of structure of AlN thin films using Fourier-transform infrared spectroscopy 

    Dallaev, Rashid; Papež, Nikola; Sobola, Dinara; Ramazanov, Shihgasan; Sedlák, Petr (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 ...
  • Microstructural investigation of defects in photovoltaic cells by the electron beam-induced current method 

    Papež, Nikola; Dallaev, Rashid; Sobola, Dinara; Macků, Robert; Škarvada, Pavel (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 ...
  • Complementary SEM-AFM of Swelling Bi-Fe-O Film on HOPG Substrate 

    Sobola, Dinara; Ramazanov, Shihgasan; Konečný, Martin; Orudzhev, Farid; Kaspar, Pavel; Papež, Nikola; Knápek, Alexandr; Potoček, Michal (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 ...
  • Structure–Properties Relationship of Electrospun PVDF fibers 

    Částková, Klára; Kaštyl, Jaroslav; Sobola, Dinara; Petruš, Josef; Šťastná, Eva; Říha, David; Tofel, Pavel (MDPI, 2020-06-23)
    Electrospinning as a versatile technique producing nanofibers was employed to study the influence of the processing parameters and chemical and physical parameters of solutions on poly(vinylidene fluoride) (PVDF) fibers’ ...
  • Field emission properties of polymer graphite tips prepared by membrane electrochemical etching 

    Knápek, Alexandr; Dallaev, Rashid; Burda, Daniel; Sobola, Dinara; Allaham, Mohammad; Horáček, Miroslav; Kaspar, Pavel; Matějka, Milan; Mousa, Marwan (MDPI, 2020-07-01)
    This paper investigates field emission behavior from the surface of a tip that was prepared from polymer graphite nanocomposites subjected to electrochemical etching. The essence of the tip preparation is to create a ...