Browsing by Author "Popelka, A."
Now showing items 21-40 of 41
-
Highly transparent low sheet resistance electrodes for solar cell applications
Shikoh A.; Popelka A.; Touati F.; Benammar M.; Zhu Z.; Mankowski T.; Balakrishnan K.; Mansuripur M.; Falco C.... more authors ... less authors ( Institute of Electrical and Electronics Engineers Inc. , 2014 , Conference Paper)High aspect ratio copper nanowires were synthesized, using a solution-based approach. The nanowires along with reduced graphene oxide thin films were sprayed onto glass and flexible substrates and later annealed in order ... -
Influence of accelerated weathering on the physical and structural properties of poly(Lactic-acid)/ poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (pla/phbv) blends
Antunes, A.; Luyt, A. S.; Popelka, A.; Mahmoud, A.; Aljarod, O.; Hassan, M. K.; Kasak, P.... more authors ... less authors ( BME-PT and GTE , 2021 , Article)The paper aims to study the poly(lactic acid) (PLA) and poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) blend properties after their degradation under 2000 h of accelerated weathering conditions following the ASTM D4329 ... -
Investigation of beech wood modified by radio-frequency discharge plasma
Novak, I.; Popelka, A.; Spitalsky, Z.; Micusik, M.; Omastova, M.; Valentin, M.; Sedliasik, J.; Janigova, I.; Kleinova, A.; Slouf, M.... more authors ... less authors ( Elsevier Ltd , 2015 , Article)Low-temperature plasma was used to improve the surface and adhesive properties of wood. The pre-treatment of wood surfaces using radio-frequency (RF) discharge plasma is attractive for various wood applications, mainly ... -
Investigation of the temperature-relatedwear performance of hard nanostructured coatings deposited on a s600 high speed steel
Santecchia E.; Cabibbo M.; Hamouda A.M.S.; Musharavati F.; Popelka A.; Spigarelli S.... more authors ... less authors ( MDPI AG , 2019 , Article)Thin hard coatings are widely known as key elements in many industrial fields, from equipment for metal machining to dental implants and orthopedic prosthesis. When it comes to machining and cutting tools, thin hard coatings ... -
Light-Responsive Hybrids Based on Carbon Nanotubes with Covalently Attached PHEMA- g-PCL Brushes
Mosnackova, K.; Mrlik, M.; Micusik, M.; Kleinova, A.; Sasinkova, V.; Popelka, A.; Opalkova Siskova, A.; Kasak, P.; Dworak, C.L.; Mosnacek, J.... more authors ... less authors ( American Chemical Society , 2021 , Article)Carbon nanotube (CNT)-based materials allow for the direct conversion of light into heat and then into mechanical force in the so-called photo-mechanical effect. This effect has been observed almost solely in the form of ... -
Materials and technologies for the tertiary treatment of produced water contaminated by oil impurities through nonfibrous deep-bed media: A review
Sobolciak P.; Popelka A.; Tanvir A.; Al-Maadeed M.A.; Adham S.; Krupa I.... more authors ... less authors ( MDPI AG , 2020 , Article)This review covers various aspects of the treatment of emulsified oil/water mixtures and is particularly focused on tertiary treatment, which means the reduction of the oil content from 70-100 ppm to below 10 ppm, depending ... -
Modulation of wettability, gradient and adhesion on self-assembled monolayer by counterion exchange and pH
Mosn??ek J.; Popelka A.; Osicka J.; Filip J.; Ilcikova M.; Kollar J.; Yousaf A.B.; Bertok T.; Tkac J.; Kasak P.... more authors ... less authors ( Academic Press Inc. , 2018 , Article)In this study, two quaternary ammonium salts derived from L-lipoic acid were applied for self-assembled monolayers formation on rough structured gold surface. The derivatives differ in functionality since one possesses ... -
Morphology analysis
Popelka, A.; Zavahir, S.; Habib, S. ( Elsevier , 2020 , Book chapter)This chapter is dedicated to the surface morphology and topography analyses of various types of polymers in terms of their structural conformations and resulting material structures. The morphology of polymers includes ... -
Multi-functional wet-electrospun piezoelectric nanofibers sensing mat: Manufacturing, characterization, and applications
Hassanin, A.H.; Elnabawy, E.; Salah, M.; Nair, R.; Omran, N.; Popelka, A.; Kandas, I.; Shehata, N.; Fahmy, Gamal, M... more authors ... less authors ( Elsevier Ltd , 2023 , Article)This paper introduces the fabrication of multi-featured nanofibers membranes using wet-electrospinning process. Polyvinylidene fluoride (PVDF) nanofibers were wet-electrospun onto poly (3, 4-ethylenedioxythiophene) poly ... -
Piezoelastic PVDF/TPU nanofibrous composite membrane: Fabrication and characterization
Elnabawy E.; Hassanain A.H.; Shehata N.; Popelka A.; Nair R.; Yousef S.; Kandas I.... more authors ... less authors ( MDPI AG , 2019 , Article)Poly (vinylidene fluoride) nanofibers (PVDF NFs) have been extensively used in energy harvesting applications due to their promising piezoresponse characteristics. However, the mechanical properties of the generated fibers ... -
Piezoresponse, mechanical, and electrical characteristics of synthetic spider silk nanofibers
Shehata N.; Kandas I.; Hassounah I.; Sobol?iak P.; Krupa I.; Mrlik M.; Popelka A.; Steadman J.; Lewis R.... more authors ... less authors ( MDPI AG , 2018 , Article)This work presents electrospun nanofibers from synthetic spider silk protein, and their application as both a mechanical vibration and humidity sensor. Spider silk solution was synthesized from minor ampullate silk protein ... -
Preparation of progressive antibacterial LDPE surface via active biomolecule deposition approach
Habib S.; Lehocky M.; Vesela D.; Humpolíček P.; Krupa I.; Popelka A.... more authors ... less authors ( MDPI AG , 2019 , Article)The use of polymers in all aspects of daily life is increasing considerably, so there is high demand for polymers with specific properties. Polymers with antibacterial properties are highly needed in the food and medical ... -
Probing the fibrillation of lysozyme by nanoscale-infrared spectroscopy
Islam, Z.; Ali, M.H.; Popelka, A.; Mall, R.; Ullah, E.; Ponraj, J.; Kolatkar, P.R.... more authors ... less authors ( Taylor and Francis Ltd. , 2021 , Article)Amyloid fibrillation is the root cause of several neuro as well as non-neurological disorders. Understanding the molecular basis of amyloid aggregate formation is crucial for deciphering various neurodegenerative diseases. ... -
Some theoretical aspects of tertiary treatment of water/oil emulsions by adsorption and coalescence mechanisms: A review
Sobolciak P.; Popelka A.; Tanvir A.; Al-Maadeed M.A.; Adham S.; Krupa I.... more authors ... less authors ( MDPI AG , 2021 , Article Review)The massive increase in the volumes of oily contaminated produced waters associated with various industrial sectors has initiated considerable technological and scientific efforts related to the development of new cleaning ... -
Sulfobetaine-based polydisulfides with tunable upper critical solution temperature (UCST) in water alcohols mixture, depolymerization kinetics and surface wettability
Abdulkareem, A.; Kasak, P.; Nassr, M.G.; Mahmoud, A.A.; Al-Ruweidi, M.K.A.A.; Mohamoud, K.J.; Hussein, M.K.; Popelka, A.... more authors ... less authors ( Academic Press Inc. , 2021 , Article)Hypothesis: Synthesis of a new family of polymers having a polydisulfide structure can be conducted from sulfobetaine-based derivative of natural (R)-lipoic acid. A polydisulfide backbone of polymer can be depolymerized ... -
Superhydrophobic Polyester/Cotton Fabrics Modified by Barrier Discharge Plasma and Organosilanes
Novák I.; Valentin M.; Špitalský Z.; Popelka A.; Sestak J.; Krupa I.... more authors ... less authors ( Taylor and Francis Inc. , 2018 , Article)In this paper, diffuse coplanar surface barrier discharge plasma at atmospheric pressure has been used for surface modification of polyester/cotton (PESc) fabric, which was subsequently modified by sol–gel process using ... -
Surface Behavior of Polyamide 6 Modified by Barrier Plasma in Oxygen and Nitrogen
Novak, I.; Popelka, A.; Valentin, M.; Chodak, I.; Spirkova, M.; Toth, A.; Kleinova, A.; Sedliacik, J.; Lehocky, M.; Maronek, M.... more authors ... less authors ( Taylor & Francis , 2014 , Article)Polyamide (PA) 6 was modified by diffuse coplanar surface barrier discharge (DCSBD) plasma in an atmosphere of nitrogen and oxygen. The surface roughness decrease of PA 6 was detected by AFM and nano-indentation after ... -
Surface functionalization of a polyurethane surface via radio-frequency cold plasma treatment using different gases
Abusrafa, A.E.; Habib, S.; Popelka, A. ( MDPI AG , 2020 , Article)Herein, the surface treatment of polyurethane (PU) films via air, O2, N2, Ar, and their mixtures were tested. The treatment was performed to incorporate new polar functionalities on the polymer surface and achieve improved ... -
Surface modification of low-density polyethylene with poly(2-ethyl-2- oxazoline) using a low-pressure plasma treatment
Popelka, A.; Kronek, J.; Novak, I.; Kleinova, A.; Micusik, M.; Spirkova, M.; Omastova, M.... more authors ... less authors ( Elsevier Ltd , 2014 , Article)Low-density polyethylene (LDPE) is a suitable polymer for biomedical applications due to its good physiochemical properties, but its insufficient biocompatibility is often an issue. Therefore, biocompatible substances such ... -
Surface modification of polyethylene/graphene composite using corona discharge
Popelka A.; Khanam P.N.; Almaadeed M.A. ( Institute of Physics Publishing , 2018 , Article)Polyethylene/graphene composites are suitable for electromagnetic interference shielding applications and are often fabricated as sandwich structures. However, the hydrophobic character of these composites can lead to ...