@article{MTMT:34762097,
	title = {Effect of Non‐Thermal Sulfur Hexafluoride Cold Plasma Modification on Surface Properties of Polyoxymethylene},
	url = {https://m2.mtmt.hu/api/publication/34762097},
	author = {Chodkowski, Michał and Terpiłowski, Konrad and Románszki, Loránd and Klébert, Szilvia and Mohai, Miklós and Károly, Zoltán},
	doi = {10.1002/cphc.202300709},
	journal-iso = {CHEMPHYSCHEM},
	journal = {CHEMPHYSCHEM: A EUROPEAN JOURNAL OF CHEMICAL PHYSICS AND PHYSICAL CHEMISTRY},
	unique-id = {34762097},
	issn = {1439-4235},
	abstract = {X‐ray photoelectron spectroscopy was employed to reveal the differences in the chemical structure of the topmost layer after plasma modification. It was found out that changes in the surface properties of the polymer could be observed even after 20 seconds of treatment. The surface becomes hydrophobic or superhydrophobic, with the water contact angles up to 160 degrees. Morphological changes and increased roughness can be observed only in the nanoscale, whereas the structure seems to be unaffected in the microscale. As a result of plasma modification a permanent hydrophobic effect was obtained on the polyoxymethylene surface.},
	year = {2024},
	eissn = {1439-7641},
	orcid-numbers = {Terpiłowski, Konrad/0000-0002-8078-3644; Klébert, Szilvia/0000-0002-3107-3371}
}

@article{MTMT:34561545,
	title = {The influence of precursor selection on electrochemical properties of radiofrequency thermal plasma synthesized graphene},
	url = {https://m2.mtmt.hu/api/publication/34561545},
	author = {Fronczak, Maciej and Károly, Zoltán and Banković, Predrag and Mojović, Zorica},
	doi = {10.1016/j.microc.2024.110079},
	journal-iso = {MICROCHEM J},
	journal = {MICROCHEMICAL JOURNAL},
	volume = {199},
	unique-id = {34561545},
	issn = {0026-265X},
	year = {2024},
	eissn = {1095-9149},
	orcid-numbers = {Fronczak, Maciej/0000-0002-8238-0232; Mojović, Zorica/0000-0003-4804-0776}
}

@article{MTMT:34125469,
	title = {Zirconia-Toughened Alumina (ZTA) Nanoceramics with a Gradient Microstructure: A Comparative Study of ZTA Ceramics with Fibrous and Granular Morphology},
	url = {https://m2.mtmt.hu/api/publication/34125469},
	author = {Bódis, Eszter and Károly, Zoltán},
	doi = {10.3390/mi14091681},
	journal-iso = {MICROMACHINES-BASEL},
	journal = {MICROMACHINES},
	volume = {14},
	unique-id = {34125469},
	abstract = {ZrO2-toughened Al2O3 (ZTA) ceramic composites with a porosity gradient and with improved mechanical properties have a wide range of possible applications. We fabricated nanofibrous and nanogranular Y-ZTA and Ce-ZTA composites with a gradient microstructure by creating a temperature gradient during SPS sintering, with the use of asymmetric graphite tool arrangement (ASY). In this study, we examined the morphology effect of the starting materials on the sintering process and on the final microstructure, as well as the mechanical properties of the composites. A large temperature difference was established for both the granular and fibrous samples fabricated in the ASY configuration, which resulted in gradient porosity along the ceramics bodies: the upper part of the ceramics showed a highly porous fine microstructure, while the opposite side was highly densified. The final microstructure of the composites can be tailored by varying the morphology of the starting ceramics or the graphite configuration. A highly porous skeleton-like structure was formed by sintering fibres in the ASY configuration, whereas the granular precursors resulted in a much less porous composite. The microstructure affected the mechanical properties of the composite. Improved hardness and more than 50% higher compression strength were obtained for the granular Ce-ZTA samples as compared to the fibrous sample. Gradient porosity with fibrous or granular morphology promotes the penetration of bioactive nanosized hydroxyapatite (HAp) into the pore structure. Fibrous ZTA absorbs HAp more effectively due to its higher porosity as well as its bimodal pore structure.},
	year = {2023},
	eissn = {2072-666X}
}

@article{MTMT:34077482,
	title = {Carbonization of Zr-loaded thiourea-functionalized styrene-divinylbenzene copolymers: An easy was to synthesize Nano-ZrO2@C and Nano-(ZrC, ZrO2)@C composites},
	url = {https://m2.mtmt.hu/api/publication/34077482},
	author = {Martiz Chalen, Jose Alejandro and Károly, Zoltán and Nagyné Bereczki, Laura and Trif, László and Farkas, Attila and Kállay-Menyhárd, Alfréd and Kótai, László},
	doi = {10.3390/jcs7080306},
	journal-iso = {J COMPOSITES SCI},
	journal = {JOURNAL OF COMPOSITES SCIENCE},
	volume = {7},
	unique-id = {34077482},
	year = {2023},
	eissn = {2504-477X},
	orcid-numbers = {Trif, László/0000-0002-3960-1829; Farkas, Attila/0000-0002-8877-2587}
}

@{MTMT:33620312,
	title = {Eljárás mikroméretű nikkel-cink-ferrit (NixZn1-xFe2O4, 0 < x < 1) előállítására},
	url = {https://m2.mtmt.hu/api/publication/33620312},
	author = {Bódis, Eszter and Fazekas, Péter and Károly, Zoltán and Keszler, Anna Mária and Klébert, Szilvia and Kótai, László and Szépvölgyi, János},
	unique-id = {33620312},
	abstract = {Jelen találmány tárgya eljárás nikkel-cink-ferrit (NixZn1-xFe2O4, 0<x<1) előállítására. A nikkel és cink ferritek, valamint a vegyes nikkel-cink-ferrit kompozitok széles körben alkalmazott anyagok az elektronikai iparban, felületmódosító anyagként acél berendezéseken, mikrohullámú eszközökben és számos más alkalmazási területen. A technika állása szerinti módszerekkel csak nagy hőmérsékleten lehet előállítani a ferriteket, és mindezidáig nem sikerült olyan módszert kifejleszteni, amely könnyen, gyorsan és enyhe körülmények biztosításával, egyszerű anyagok felhasználásával, egyszerűen kivitelezhető technológiai rendszerben lehetővé tenné homogén fémion eloszlással és kis szemcseméretben a nikkel-cink vegyes ferritek előállítását. A jelen találmány szerinti eljárás megoldást biztosít a korábbi módszerek hátrányainak kiküszöbölésére egy új intermedier alkalmazásával.},
	year = {2023},
	orcid-numbers = {Klébert, Szilvia/0000-0002-3107-3371; Szépvölgyi, János/0000-0003-3727-4745}
}

@article{MTMT:33290419,
	title = {Enzymatic route for selective glycerol oxidation using covalently immobilized laccases},
	url = {https://m2.mtmt.hu/api/publication/33290419},
	author = {Bîtcan, Ioan and Petrovici, Andreea and Pellis, Alessandro and Klébert, Szilvia and Károly, Zoltán and Nagyné Bereczki, Laura and Péter, Francisc and Todea, Anamaria},
	doi = {10.1016/j.enzmictec.2022.110168},
	journal-iso = {ENZYME MICROB TECH},
	journal = {ENZYME AND MICROBIAL TECHNOLOGY},
	volume = {163},
	unique-id = {33290419},
	issn = {0141-0229},
	abstract = {Glycerol is an important starting material for the synthesis of many chemical compounds and its selective oxidation represents an efficient way to produce value-added compounds. Glyceric acid, one of these selective oxidation products, is an important intermediate in the food, medicine, cosmetics, and light industries. In this work, four commercially available native laccases were screened for glycerol oxidation using different initiators, and the two most efficient biocatalysts were covalently immobilized on functionalized magnetic and polymethacrylate (LifetechTM) solid supports. Apart from the mostly employed Fe3O4 magnetic particles, in this work Ni-Zn or Ni-Zn-Co spinel ferrite (MFe2O4) microparticles were used. Particularly, the utilization (for the first time for laccase immobilization) of Ni-Zn ferrite support Ni0.7Zn0.3Fe2O4 functionalized with 3-aminopropyl-trimethoxysilane, via crosslinking by glutaraldehyde and reduction with NaBH4 led to excellent biocatalytic efficiency and stability. These results confirm the feasibility of Trametes versicolor laccase for covalent bonding, as presumed by computational modelling. The resulted enzymatic preparations were characterized in detail in terms of stability and reusability, demonstrating enhanced storage, pH and thermal stability compared to the native enzymes. The most active biocatalysts (790.93 [U/g]) were successfully used for glycerol oxidation and the specific conversion in glyceric acid exceeded 50%.},
	keywords = {CONVERSION; ACID; NANOPARTICLES; AROMATIC-COMPOUNDS; composite; DEHYDROGENASE; Solvents; BIOCATALYSIS; glyceric acid; Catalytic efficiency; TEMPO; Glycerol oxidation; covalent binding; LACCASE IMMOBILIZATION},
	year = {2023},
	eissn = {1879-0909},
	orcid-numbers = {Klébert, Szilvia/0000-0002-3107-3371; Todea, Anamaria/0000-0001-7744-103X}
}

@article{MTMT:34502641,
	title = {Raman studies on carbon-containing phases in nanosized-ZrO2/C and nanosized-(ZrC,ZrO2)/C composites},
	url = {https://m2.mtmt.hu/api/publication/34502641},
	author = {Martiz Chalen, Jose Alejandro and Farkas, Attila and Károly, Zoltán and Paiva Franguelli, Fernanda and Samaniego Andrade, Samantha Kathiuska and Kállay-Menyhárd, Alfréd and Kótai, László},
	doi = {10.52340/ns.2022.07},
	journal-iso = {NANO STUDIES},
	journal = {NANO STUDIES},
	volume = {21-22},
	unique-id = {34502641},
	issn = {1987-8826},
	year = {2022},
	pages = {177-186},
	orcid-numbers = {Farkas, Attila/0000-0002-8877-2587}
}

@article{MTMT:33272193,
	title = {Preparation and characterization of fibrous alumina and zirconia toughened alumina ceramics with gradient porosity},
	url = {https://m2.mtmt.hu/api/publication/33272193},
	author = {Bódis, Eszter and Molnár, Kolos and Móczó, János and Károly, Zoltán},
	doi = {10.3390/nano12234165},
	journal-iso = {NANOMATERIALS-BASEL},
	journal = {NANOMATERIALS},
	volume = {12},
	unique-id = {33272193},
	abstract = {This paper investigated a synthesis process for highly porous Al2O3, Y-ZTA, and Ce-ZTA ceramic nanocomposites with gradient microstructure and improved mechanical properties. Ceramic nanofibres were synthesized as the starting material. The gradient microstructure was developed during spark plasma sintering using an asymmetric graphite arrangement that generated significant temperature differences (80–100 °C) between the opposite sides of the samples. Structural and mechanical properties of the fibrous ceramic composites were investigated. The effect of the temperature gradient on properties was also discussed. While the asymmetric configuration resulted in a gradient porosity, reference samples fabricated in standard graphite configuration were uniformly porous. The gradient structure and the ZrO2 addition led to improved hardness and compression strength of the sintered samples. However, the opposite sides of the samples exhibited considerable variations in both microstructure and in terms of properties. The upper part of the Ce-ZTA ceramic showed a highly porous structure with 18.2 GPa hardness, while the opposite side was highly densified with 23.0 GPa hardness. Compressive strength was 46.1 MPa and 52.1 MPa for Y-ZTA and Ce-ZTA sintered at 1300 °C, respectively, despite their high porosity. The research provided a promising approach to prepare highly porous ZTA composites with high strength for a wide range of applications.},
	year = {2022},
	eissn = {2079-4991},
	orcid-numbers = {Molnár, Kolos/0000-0002-9331-4652}
}

@article{MTMT:33199936,
	title = {Immobilization of Metronidazole on Mesoporous Silica Materials},
	url = {https://m2.mtmt.hu/api/publication/33199936},
	author = {Szentmihályi, Klára and Klébert, Szilvia and May, Zoltán and Bódis, Eszter and Mohai, Miklós and Trif, László and Feczkó, Tivadar and Károly, Zoltán},
	doi = {10.3390/pharmaceutics14112332},
	journal-iso = {PHARMACEUTICS},
	journal = {PHARMACEUTICS},
	volume = {14},
	unique-id = {33199936},
	issn = {1999-4923},
	abstract = {Metronidazole (MTZ) is a widely used drug, but due to its many side effects, there is a growing trend today to use a minimum dose while maintaining high efficacy. One way to meet this demand is to reduce the size of the drug particles. A relatively new method of size reduction is attaching the drug molecules to a mesoporous carrier. In this paper, we studied the fixation of MTZ molecules on mesoporous silica carriers. The drug was immobilized on two mesoporous silica materials (Syloid, SBA-15) with the use of a variety of immersion techniques and solvents. The immobilized drug was subjected to physicochemical examinations (e.g., SEM, XPS, XRD, nitrogen uptake, DSC) and dissolution studies. A significantly higher immobilization was attained on SBA-15 than on a Syloid carrier. Among the processing parameters, the type of MTZ solvent had the highest influence on immobilization. Ultrasonic agitation had a lower but still significant impact, while the concentration of MTZ in the solution made no difference. Under optimal conditions, with the application of an ethyl acetate solution, the surface coverage on SBA-15 reached as much as 91%. The immobilized MTZ exhibited a ca. 10% faster dissolution rate as compared to the pure micron-sized drug particles.},
	year = {2022},
	eissn = {1999-4923},
	orcid-numbers = {Klébert, Szilvia/0000-0002-3107-3371; Trif, László/0000-0002-3960-1829}
}

@article{MTMT:32945366,
	title = {Effect of Metallic and Non-Metallic Additives on the Synthesis of Fullerenes in Thermal Plasma},
	url = {https://m2.mtmt.hu/api/publication/32945366},
	author = {Keszler, Anna Mária and Kováts, Éva and Bódis, Eszter and Károly, Zoltán and Szépvölgyi, János},
	doi = {10.3390/condmat7030044},
	journal-iso = {CONDENS MATTER},
	journal = {CONDENSED MATTER},
	volume = {7},
	unique-id = {32945366},
	year = {2022},
	eissn = {2410-3896},
	pages = {44-55},
	orcid-numbers = {Szépvölgyi, János/0000-0003-3727-4745}
}