A5083669905- Shape Memory Alloy Transformations
- Magnetic Properties and Applications
- Microstructure and Mechanical Properties of Steels
- Metallic Glasses and Amorphous Alloys
- Semiconductor materials and interfaces
- Intermetallics and Advanced Alloy Properties
- Microstructure and mechanical properties
- Phase-change materials and chalcogenides
- Biopolymer Synthesis and Applications
- Polymer composites and self-healing
- nanoparticles nucleation surface interactions
- Surface and Thin Film Phenomena
- Silicon and Solar Cell Technologies
- biodegradable polymer synthesis and properties
- Silicon Nanostructures and Photoluminescence
- Metal and Thin Film Mechanics
- Bee Products Chemical Analysis
- Bone Tissue Engineering Materials
- Magnetic Properties of Alloys
- Copper Interconnects and Reliability
- Ion-surface interactions and analysis
- Chalcogenide Semiconductor Thin Films
- Semiconductor materials and devices
- Advanced materials and composites
- Advanced Polymer Synthesis and Characterization
University of Debrecen
2016-2025
Czech Academy of Sciences, Institute of Physics
2022
National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”
2006
G.V. Kurdyumov Institute for Metal Physics
2006
Institute for Solid State Physics and Optics
1990-2000
Hungarian Academy of Sciences
1998
Acoustic emission, AE, belonging to a rubber-like deformation in martensitic state after the stabilization aging of stress-induced martensite (SIM aging) Ni51Fe18Ga27Co4 single crystals compression, were investigated. AE activity plateau regions stress–strain loop is due massive reorientation from variants produced by SIM preferred compressive stress (perpendicular used and vice versa. For unloading, large just at knee point stress–stain curve attributed difficulty re-nucleation...
Developed method to optimize green CNDs synthesis & measure concentration in baked goods. Extracted characterized using TEM, Raman, UV-Vis fluorescence.
Silica aerogels are extensively used as catalyst supports due to their mesoporous structure and chemical inertness. In this study, SiO2–AuNP containing gold nanoparticles (AuNPs) were synthesized using the sol-gel method followed by supercritical CO2 drying. The inclusion of polyvinyl pyrrolidone (PVP) a stabilizing agent preserved particle sizes during gelation process. contrast, without PVP contained enlarged AuNP aggregates, resulting in shift plasmon resonance color from red bluish or...
Copper ferrite nanoparticles for use as MRI contrast agents were synthesized using two different methods. A novel microwave-assisted (MW) solvothermal method was developed and compared to a conventional 12-hour synthesis (Reflux) an eco-friendlier approach. This innovative successfully produced with enhanced properties traditional materials. The nanoparticles’ morphological magnetic evaluated tested in in-vivo studies. results revealed both similarities differences between the...
Candida auris biofilms exhibit decreased susceptibility to echinocandins, which is associated with poorer clinical outcomes. Farnesol a quorum-sensing molecule enhancing the activity of antifungals; therefore, we evaluated in vitro effect farnesol anidulafungin, caspofungin, or micafungin against using fractional inhibitory concentration indexes (FICI), Bliss independence model, LIVE/DEAD-assay and scanning electron microscopy. Based on mathematical models, caused synergism eleven out twelve...
Electrospinning has recently been recognized as a potential method for use in biomedical applications such nanofiber-based drug delivery or tissue engineering scaffolds. The present study aimed to demonstrate the electrospinning preparation and suitability of β-tricalcium phosphate-modified aerogel containing polyvinyl alcohol/chitosan fibrous meshes (BTCP-AE-FMs) bone regeneration under vitro vivo conditions. mesh physicochemical properties included 147 ± 50 nm structure, aqueous media...
Monolithic silica aerogels are nanostructured solids characterized with exceptionally high porosity and specific surface area. Although their strength can be improved by treatment polymers, none of them has been tested yet as a filler in biocompatible polymer composites. The new aerogel–poly(methyl methacrylate) composites were prepared free radical bulk polymerization neat methyl methacrylate the presence natural functionalized at 60°C, using cumene hydroperoxide initiator 4, N ,...
The jerky character of austenite-martensite phase transformation in ${\mathrm{Ni}}_{2}\mathrm{MnGa}$ single crystals (with 10M martensite structure) has been investigated by thermal cycling using a differential scanning calorimeter (DSC) and detection acoustic emissions (AEs) at low cooling heating rates (0.1 K/min below). It is illustrated that, besides the rate, mass surface roughness are also important parameters optimizing best signal/noise ratio order to obtain individual peaks suitable...
Toluene diamine (TDA) is a major raw material in the polyurethane industry and thus, its production highly important. TDA obtained through catalytic hydrogenation of 2,4-dinitrotoluene (2,4-DNT). In this study special catalyst has been developed by decomposition cobalt ferrite nanoparticles onto natural clay-oxide nanocomposite (bentonite) surface using microwave-assisted solvothermal method. The particles were examined TEM X-ray diffraction. palladium immobilized on bentonite crystal was...
The present work aimed at the preparation and investigation of different epoxy-polyurethane (EP-PU) co-networks. EP-PU co-networks were obtained by applying two synthetic strategies, in which coupling element, Diels⁻Alder (DA) adduct, was prepared previously or formed "in situ" reaction between furan functionalized polyurethane furfuryl amine-diglycidyl ether bisphenol-A oligomers (FA_DGEBA). For synthesis these networks, poly(ε-caprolactone)-diol (PCD, Mn = 2 kg/mol) poly(ε-caprolactone)...
Simultaneous thermal, acoustic, and magnetic emission (AE ME) measurements during thermally induced martensitic transformation in ${\text{Ni}}_{2}\text{MnGa}$ single crystals demonstrate that all three types of the above noises display many coincident peaks same start finish temperatures. The amplitude energy distribution functions for AE ME avalanches satisfy power-law behavior, corresponding to symmetry martensite. At zero external field asymmetry exponents was obtained: their value larger...
ABSTRACT Crosslinked polyurethanes (PUs) containing irreversible (allophanate) and reversible Diels‐Alder chemical bonds were synthesized using various diisocyanates (methylene diphenyl diisocyanate MDI, 1,6‐hexamethylenediisocyanate HDI) poly(ɛ‐caprolactone) ((PCL) with different molecular weights ( M n = 10 kg/mol, 25 50 kg/mol) as diol component. The melting/crystallization of PCL the DA acted temperature‐activated switches for shape memory performances, while allophanate network provided...
Gold nanoparticles (AuNPs) display surface plasmon resonance (SPR) as a result of their irradiation at targeted light frequency. SPR also results in heat production that increases the temperature surrounding environment, affecting polymerization. The aim was to investigate effect AuNPs on dimethacrylate-based photopolymer system. tested composites were designed overlap illumination required for polymerization and effect. 5 nm-sized dodecanethiol capped applied different concentrations matrix...