Recent Submissions

  • 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 ...
  • Surface Analyses of PVDF/NMP/[EMIM][TFSI] Solid Polymer Electrolyte 

    Sedlák, Petr; Sobola, Dinara; Gajdoš, Adam; Dallaev, Rashid; Nebojsa, Alois; Kuberský, Petr (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 ...
  • SEM imaging and XPS characterization of doped PVDF fibers 

    Smejkalová, Tereza; Ţălu, Ştefan; Dallaev, Rashid; Částková, Klára; Sobola, Dinara; Nazarov, Anton (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 

    Misiurev, Denis; Ţălu, Ştefan; Dallaev, Rashid; Sobola, Dinara; Goncharova, Mariya (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 

    Mrlík, Miroslav; Osička, Josef; Cvek, Martin; Ilčíková, Markéta; Srnec, Peter; Gorgol, Danila; Tofel, Pavel (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 ...
  • Lignin-Based Gel Polymer Electrolyte for Cationic Conductivity 

    Nabi, Shabanov; Rabadanov, Kamil; Gafurov, Malik; Isaev, Abdulgalim; Sobola, Dinara; Suleimanov, Sagim; Amirov, Akhmed; Asvarov, Abil (MDPI, 2021-07-14)
    The article presents the results of the preparation and study of a gel-polymer electrolyte based on lignin obtained from Pinus sylvestris. Sulfonation and subsequent chlorination of lignin make possible implementation of ...
  • PVDF Fibers Modification by Nitrate Salts Doping 

    Sobola, Dinara; Kaspar, Pavel; Částková, Klára; Dallaev, Rashid; Papež, Nikola; Sedlák, Petr; Trčka, Tomáš; Orudzhev, Farid; Kaštyl, Jaroslav; Weiser, Adam; Knápek, Alexandr; Holcman, Vladimír (MDPI, 2021-07-24)
    The method of inclusion of various additives into a polymer depends highly on the material in question and the desired effect. In the case of this paper, nitride salts were introduced into polyvinylidene fluoride fibers ...
  • 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 ...

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