Recent Submissions

  • 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 ...
  • Electrical and optical characterization of Os-substituted rare-earth orthoferrite YbFeO3-gamma powders 

    Polat, Özgür; Coskun, Mustafa; Sobola, Dinara; Kurt, B. Zengin; Caglar, Mujdat; Turut, Abduelmecit (Springer Nature, 2021-01-02)
    The electrical properties of Os-doped YbFeO3 (YbFO) powders prepared by solid-state reaction have been studied by Impedance Spectrometer/Impedance Spectrometer. SEM, XPS and Raman spectroscopy were utilized for understanding ...
  • Case Study of Polyvinylidene Fluoride Doping by Carbon Nanotubes 

    Kaspar, Pavel; Sobola, Dinara; Částková, Klára; Dallaev, Rashid; Šťastná, Eva; Sedlák, Petr; Knápek, Alexandr; Trčka, Tomáš; Holcman, Vladimír (MDPI, 2021-03-15)
    Modern material science often makes use of polyvinylidene fluoride thin films because of various properties, like a high thermal and chemical stability, or a ferroelectric, pyroelectric and piezoelectric activity. Fibers ...
  • An Electrochemical Amperometric Ethylene Sensor with Solid Polymer Electrolyte Based on Ionic Liquid 

    Kuberský, Petr; Navrátil, Jiří; Syrový, Tomáš; Sedlák, Petr; Nešpůrek, Stanislav; Hamáček, Aleš (MDPI, 2021-01-21)
    An electrochemical amperometric ethylene sensor with solid polymer electrolyte (SPE) and semi-planar three electrode topology involving a working, pseudoreference, and counter electrode is presented. The polymer electrolyte ...
  • Characterization of GaAs Solar Cells under Supercontinuum Long-Time Illumination 

    Papež, Nikola; Dallaev, Rashid; Kaspar, Pavel; Sobola, Dinara; Škarvada, Pavel; Ţălu, Ştefan; Ramazanov, Shikhgasan; Nebojsa, Alois (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 ...
  • 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 ...
  • Influence of metal vapours on radiation characteristics of air arc plasmas 

    Bartlová, Milada; Kloc, Petr; Aubrecht, Vladimír; Bogatyreva, Nadezda (ČVUT, 2020-11-18)
    This paper deals with the evaluation of radiation properties of air arc plasma with various admixtures of Cu, Ag, and Fe, respectively. Under assumption of isothermal plasma cylinder, the net emission coefficients were ...
  • Poling procedures and piezoelectric response of (Ba0.85Ca0.15Zr0.1T0.9)O-3 ceramics 

    Bijalwan, Vijay; Sokolov, Ilya; Tofel, Pavel (Taylor & Francis, 2020-12-23)
    The goal of the current report was to find the optimal poling conditions: poling field, poling time and poling temperature for lead-free (Ba0.85Ca0.15Zr0.1T0.9)O-3 ceramic. It has been noticed that the low poling field (< ...
  • Fractal Dimension Analysis of Three-Point Bending Concrete Test Specimens 

    Sobek, Jakub; Frantík, Petr; Trčka, Tomáš; Lehký, David (EDP Sciences, 2020-10-05)
    The paper deals with the analysis of the fractal dimension of fracture surfaces of concrete specimens tested in a three-point bending configuration. Fifteen representative specimens were chosen out of a bigger set for the ...
  • 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 ...
  • The effect of thermal treatment on ac/dc conductivity and current fluctuations of PVDF/NMP/[EMIM][TFSI] solid polymer electrolyte 

    Sedlák, Petr; Gajdoš, Adam; Macků, Robert; Majzner, Jiří; Holcman, Vladimír; Sedláková, Vlasta; Kuberský, Petr (NATURE RESEARCH, 2020-12-03)
    The experimental study deals with the investigation of the effect of diverse crystallinity of imidazolium ionic-liquid-based SPE on conductivity and current fluctuations. The experimental study was carried out on samples ...
  • Characterization of Polyvinylidene Fluoride (PVDF) Electrospun Fibers Doped by Carbon Flakes 

    Kaspar, Pavel; Sobola, Dinara; Částková, Klára; Knápek, Alexandr; Burda, Daniel; Orudzhev, Farid; Dallaev, Rashid; Tofel, Pavel; Trčka, Tomáš; Grmela, Lubomír; Hadaš, Zdeněk (MDPI, 2020-11-24)
    Polyvinylidene fluoride (PVDF) is a modern polymer material used in a wide variety of ways. Thanks to its excellent resistance to chemical or thermal degradation and low reactivity, it finds use in biology, chemistry, and ...
  • Atomic Layer Deposition of Mixed-Layered Aurivillius Phase on TiO2 Nanotubes: Synthesis, Characterization and Photoelectrocatalytic Properties 

    Orudzhev, Farid; Ramazanov, Shihgasan; Sobola, Dinara; Isaev, Abdulgalim; Wang, Chuanyi; Magomedova, Asiyat; Kadiev, Makhmud; Kaviyarasu, Kasinathan (MDPI, 2020-11-02)
    For the first time, one-dimensional phase-modulated structures consisting of two different layered Aurivillius phases with alternating five and six perovskite-like layers were obtained by atomic layer deposition (ALD) on ...
  • Effect of the Different Crystallinity of Ionic Liquid Based Solid Polymer Electrolyte on the Performance of Amperometric Gas Sensor 

    Sedlák, Petr; Kuberský, Petr; Gajdoš, Adam; Majzner, Jiří; Sedláková, Vlasta; Macků, Robert; Holcman, Vladimír (MDPI, 2020-11-14)
    Solid polymer electrolytes (SPE) based on ionic liquid, poly-(vinylidene fluoride) and solvent N-methyl-pyrrolidone represent an effective component in electrochemical sensors. The advantage lies in their composition, which ...
  • Piezoelectric Current Generator Based on Bismuth Ferrite Nanoparticles 

    Orudzhev, Farid; Ramazanov, Shihgasan; Sobola, Dinara; Alikhanov, Nariman; Holcman, Vladimír; Škvarenina, Ľubomír; Kaspar, Pavel; Gadjilov, Gamzat (MDPI, 2020-11-25)
    Bismuth ferrite nanoparticleswith an average particle diameter of 45 nmand spatial symmetry R3c were obtained by combustion of organic nitrate precursors. BiFeO3-silicone nanocomposites with various concentrations of ...
  • Surface Modification and Enhancement of Ferromagnetism in BiFeO3 Nanofilms Deposited on HOPG 

    Ramazanov, Shihgasan; Sobola, Dinara; Orudzhev, Farid; Knápek, Alexandr; Polčák, Josef; Potoček, Michal; Kaspar, Pavel; Dallaev, Rashid (MDPI, 2020-10-09)
    BiFeO3 (BFO) films on highly oriented pyrolytic graphite (HOPG) substrate were obtained by the atomic layer deposition (ALD) method. The oxidation of HOPG leads to the formation of bubble regions creating defective regions ...
  • Aluminum Nitride Nanofilms by Atomic Layer Deposition Using Alternative Precursors Hydrazinium Chloride and Triisobutylaluminum 

    Dallaev, Rashid; Sobola, Dinara; Tofel, Pavel; Škvarenina, Ľubomír; Sedlák, Petr (MDPI, 2020-10-03)
    The aim of this study is motivated by the pursuit to investigate the performance of new and as yet untested precursors such as hydrazinium chloride (N2H5Cl) and triisobutylaluminum Al(C4H9)3 in the AlN atomic layer deposition ...
  • 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 ...
  • 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’ ...
  • 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.

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