J. Cebulski

Rzeszów University

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Joanna Depciuch

Institute of Nuclear Physics, Polish Academy of Sciences

E. M. Sheregiǐ

Rzeszów University

Yaroslav Shpotyuk

Lviv University

J. Polit

Rzeszów University

A. Marcelli

Istituto Nazionale di Fisica Nucleare

M. Piccinini

National Agency for New Technologies, Energy and Sustainable Economic Development

K. Szmuc

Rzeszów University

KŁ

Kornelia Łach

Rzeszów University

O. Shpotyuk

Vlokh Institute of Physical Optics

Ewa Kaznowska

Rzeszów University

Cooperative Institutions

Rzeszów University

130

Institute of Physics

Rzeszów University of Technology

Lviv University

Centre National de la Recherche Scientifique

Lviv Polytechnic National University

Polish Academy of Sciences

Pacific Northwest National Laboratory

Czech Academy of Sciences, Institute of Physics

Jan Długosz University

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Light-curing effects in acrylic-type dental nanocomposites probed by annihilating positrons: the case of densely monolith ЭCTA-3® restoratives

Applied Nanoscience (2020)

Olha Shpotyuk A. Ingram O. Shpotyuk Dmytro Slobodzyan J. Cebulski

Monolith

10.1007/s13204-020-01423-w

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Citations (1)

First identification of the effects of low frequency electromagnetic field on the micromolecular changes in adipose tissue-derived mesenchymal stem cells by fourier transform infrared spectroscopy

Journal of Medical Physics (2021)

Kornelia Łach J. Cebulski Radosław Chaber Beata Kocan Renata Wojnarowska‐Nowak

In this study, we hypothesize that exposure of adipose tissue-mesenchymal stem cells (AT-MSCs) to electromagnetic field (EMF) may impact adipose stem cells' micromolecular structure (analyzed using Fourier transform infrared spectroscopy [FTIR]).The AT-MSCs were exposed to continuous vertically applied sinusoidal EMF with a frequency of 50 Hz and a flux density of 1.5 mT for 24, 48, and 72 h. After an appropriate time (24, 48, 72 h) cells were washed with PBS, scrubbed, and immediately taken into FTIR analyses.EMFs affect AT-MSCs. The greatest differences were in the range of nucleic acids and proteins in the fingerprint region which occurred after 24 and 48 h of EMF exposure. However, in the case of 72 h of EMF exposure, no significant differences were noticed in the FTIR spectra towards the control.FTIR spectra show differences between samples under the influence of EMF before they will be manifested at the morphological level. The largest differences in the range of nucleic acids and proteins in the fingerprint region occurred at 24 and 48 h of EMF exposure. That means it was during the first 48 h after EMF exposure a great number of dynamic changes occurred. However, in the case of AT-MSCs in 72 h EMF and 72 h control, no significant differences were noted in the FTIR spectra, which means that the chemical composition in these two cases is similar. EMF is not neutral for stem cells, especially in the in the first hours of interaction (24 h, 48 h).

10.4103/jmp.jmp_57_21

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PtNiRu/SnO₂ Nanoframes as Anodic Catalyst for Direct Ethanol Fuel Cells

The Journal of Physical Chemistry C (2024)

K. Szmuc Natalia Lach J. Cebulski Bogumił Cieniek Anna Ruszczyńska

Searching for new energy sources and improving the already existing ones are among the most important tasks in physics, material sciences, and chemistry. These three disciplines especially come together in the development of new catalytic materials for fuel cell applications. Herein, a novel nanoframe-based PtNiRu/SnO2 catalyst for ethanol oxidation reaction (EOR) is proposed. Owing to properties resulting from chemical composition, shape, and structure, the catalyst shows enhanced electrocatalytic performance. The presented nanocatalyst is obtained from solid rhombic dodecahedral nanoparticles during galvanic replacement reaction with the following SnO2 nanoparticles deposition on its surface. PtNiRu/SnO2, as well as PtNiRu catalyst, were characterized by transmission electron microscopy and X-ray diffraction and tested electrochemically. PtNiRu/SnO2 nanocatalysts exhibit the highest activity toward EOR and have the lowest onset potential among all of the tested catalysts. The achieved results suggest that the presented nanocatalysts could find application as an anode in a direct ethanol fuel cell for ethanol oxidation.

Direct-ethanol fuel cell

10.1021/acs.jpcc.4c01130

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Effect of bismuth modification on crystallization of chalcogenide glasses

Materiały Ceramiczne /Ceramic Materials (2017)

J. Szlęzak Yaroslav Shpotyuk Catherine Boussard‐Plédel J. Cebulski Bruno Bureau

Bismuth

Chalcogenide glass

Source

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Identification of chemical changes in healthy breast tissue caused by chemotherapy using Raman and FTIR spectroscopy: A preliminary study

Infrared Physics & Technology (2019)

Joanna Depciuch Agata Stanek‐Widera Martyna Warchulska Dariusz Lange Karolina Sarwa

Chemical structure

10.1016/j.infrared.2019.102989

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Probing calorimetric heat transfer phenomena in multi-nanophase substances: A case study of some over-stoichiometric nanoarsenicals

Thermochimica Acta (2021)

O. Shpotyuk A. Kozdraś S. A. Kozyukhin Yaroslav Shpotyuk J. Cebulski

Nanocrystalline material

Stoichiometry

Temperature cycling

Realgar

10.1016/j.tca.2021.178955

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Determination of platinum-resistance of women with ovarian cancer by FTIR spectroscopy combined with multivariate analyses and machine learning methods

Scientific Reports (2024)

Marta Kluz-Barłowska Tomasz Kluz Wiesław Paja Jaromir Sarzyński Edyta Barnaś

Patients with high-grade ovarian cancer have a poor prognosis, thus effective treatment remains an unmet medical issue of high importance. Moreover, finding the reason for resistance to cisplatin is a crucial task for the improvement of anti-cancer drugs. In this study, we showed for the first time a chemical difference in a serum collected from platinum-resistance and platinum-sensitive women suffering from ovarian cancer using Fourier Transform InfraRed (FTIR) spectroscopy followed by a data analysis by Principal Component Analysis (PCA), Hierarchical Component Analysis (HCA) and 4 different machine learning algorithms. Obtained results showed a shift of PO2-symmetric vibrations, amide III and amide II were observed on the FTIR spectrum of the serum collected from platinum-resistance women in comparison with the spectrum of the serum from platinum-sensitive women. Furthermore, PCA analysis clearly demonstrated the most important role of amide II and amide I in the differentiation of platinum-sensitive and platinum-resistance women. In addition, machine learning algorithms showed the important role of wavenumber at 1631 cm-1(amide I) and wavenumber at 2993 cm-1 (asymmetric stretching CH3 vibrations). The accuracy of the obtained results was above 92%. Summarizing, FTIR can be used in detection platinum-resistance phenomena.

10.1038/s41598-024-76965-y

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MAGNETOPHONON RESONANCE IN Mn_xCd_yHg_1-x-yTe

International Journal of Modern Physics B (2007)

Dariusz Płoch J. Cebulski E. M. Sheregiǐ

The aim of this work is to analyze the band-structure parameters of Mn x Cd y Hg 1- x - y Te (MMCT) alloys by means of Magnetophonon Resonance (MPR) and to compare that obtained for Zn x Cd y Hg 1- x - y Te (ZMCT). MPR was observed for two samples of Mn x Cd y Hg 1- x - y Te (MMCT) (I- x =0.095 and y =0.09, II-0.04 and y =0.19). The measurements of MPR were performed in pulsed magnetic fields at different temperatures ranging from 77 K to 200 K. The several wide maxima are clearly visible on the experimental curves corresponding to four series of peaks. These series are related to three kinds of phonons analogous to ZMCT. The system of MPR peaks in MMCT is shifted significantly to the higher magnetic fields in comparison with the ZMCT resonance curves of approximately the same content of Zn . The value of effective mass obtained by MPR experiment is of 66% greater than those calculated in the framework of three-band Kane model, in which the value of E g , was extracted from the photoconductivity data.

Font

10.1142/s0217979207043300

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Influence of hydrogen on hydrogenated cadmium telluride optical spectra

Physica status solidi. C, Conferences and critical reviews/Physica status solidi. C, Current topics in solid state physics (2009)

M. Pociask J. Polit E. M. Sheregiǐ J. Cebulski A. Kisiel

Abstract The presence of oxygen impurity in semiconducting materials affects the electrical properties of crystals and significantly limits their application. To remove oxygen impurity, ultra‐pure hydrogen is used while growing Te‐containing crystals such as CdTe, CdZnTe, and ZnTe. The hydrogenation of CdTe crystals is a technological process that purifies the basic material from oxygen, mainly cadmium and tellurium oxide compounds incorporated in CdTe crystalline lattice. In the present work we analyses the deformations induced by hydrogen and oxygen atoms in CdTe crystals looking at their influence on the near fundamental band (NFB), middle infrared (MIR) and far infrared (FIR) reflectivity spectra as well as on cathodoluminescence (CL) spectra. Comparison of the hydrogenated CdTe phonon structure profiles confirms the presence of hydrogen atoms bounded inside the lattice. The possible localization of hydrogen and oxygen ions within the tetrahedron coordinated lattice is discussed in the framework of a model that shows a good agreement with recent NFB, MIR and FIR experiments carried out on hydrogenated CdTe crystals. Measured reflection spectra in the wavelength range 190‐1400 nm (NFB) indicate the appearance in CdTe(H M ) and CdTe(H L ) of additional maxima at 966 nm related to the electron transitions from level about 0.2 eV above the valence band. The CL spectra confirmed existence of this electron level. We present a possible H 2 alignment similar to the single H model i.e., over the face (at about 0.38 Å). For this model the angle from the central atom to the H atoms is equal to 64° which is also close to the bonding angle of CdH 2 (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

Cadmium telluride photovoltaics

Tellurium

Cathodoluminescence

Chalcogen

10.1002/pssc.200881761

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Characterization Of Oxide Layers Produced On The AISI 321 Stainless Steel After Annealing

Archives of Metallurgy and Materials (2015)

Wojciech Bochnowski Andrzej Dziedzic S. Adamiak M. Berchenko M. Trzyna

Abstract In this study, the structure, chemical composition and topography of oxide layers produced on the surface of the AISI 321 austenitic steel in the annealing process were analyzed. Heat treatment was done at 980°C temperature for 1 hour time in different conditions. The annealing was done in a ceramic furnace in oxidation atmosphere and in vacuum furnaces with cylindrical molybdenum and graphite chambers. The analysis was carried out using the following methods: a scanning electron microscope (SEM) equipped with an energy-dispersive X-ray spectrometer (EDX), a transmission electron microscope (TEM) equipped with an energy-dispersive X-ray spectrometer (EDX), an X-ray diffractometer (XRD), a secondary ion mass spectrometer with time-of-flight mass analyzer (TOF SIMS) and an atomic force microscope (AFM). The oxide layer formed during annealing of the AISI 321 steel at 980°C consisted of sub-layers, diversified in the chemical composition. The thickness of the oxidized layer is depended on the annealing conditions. In a ceramic furnace in oxidation atmosphere, the thickness of the oxide layer was of 300-500 nm, in a vacuum furnace with molybdenum and graphite heating chambers, it ranged from 40 to 300 nm and from a few to 50 nm, respectively. TOF SIMS method allows to get average (for the surface of 100 μm × 100 μm) depth profiles of concentration of particular elements and elements combined with oxygen. In oxide layers formed in vacuum furnaces there are no iron oxides. Titanium, apart from being bounded with carbon in carbides, is a component of the oxide layer formed on the surface of the AISI 321 steel.

Diffractometer

10.1515/amm-2015-0380

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Citations (2)