A5090011987- Ferroelectric and Piezoelectric Materials
- Advanced Memory and Neural Computing
- Electronic and Structural Properties of Oxides
- Acoustic Wave Resonator Technologies
- Multiferroics and related materials
- Microwave Dielectric Ceramics Synthesis
- Analytical chemistry methods development
- Magnetic and transport properties of perovskites and related materials
- Transition Metal Oxide Nanomaterials
- Electrochemical Analysis and Applications
- Advanced ceramic materials synthesis
- Radioactive element chemistry and processing
- Semiconductor materials and devices
- Advanced Condensed Matter Physics
- Metal and Thin Film Mechanics
- Bone Tissue Engineering Materials
- Geotechnical and Geomechanical Engineering
- Photorefractive and Nonlinear Optics
- X-ray Spectroscopy and Fluorescence Analysis
- Ferroelectric and Negative Capacitance Devices
- Advancements in Battery Materials
- Perovskite Materials and Applications
- Structural Engineering and Materials Analysis
- Recycling and utilization of industrial and municipal waste in materials production
- Aeroelasticity and Vibration Control
University of Silesia in Katowice
2014-2024
Institute of Physics
2013-2024
Forschungszentrum Jülich
2013
Katowice School of Technology
2011
Institute of Metallurgy and Materials Science
1989
A novel and selective sorbent for micro-solid phase extraction was synthesized by chemical functionalization of graphene oxide with glycine.
Abstract Molybdenum disulfide (MoS 2 ) was supported on graphene oxide (GO) by hydrothermal method. The resulting nanocomposite -rGO) characterized X-ray photoelectron spectroscopy, scanning electron microscopy, and transmission microscopy. experiments show that at pH 2, MoS -rGO has a great affinity for adsorption of hexavalent chromium ions while Cr(III) remain in aqueous sample. In the process, dominant role plays chemisorption. determined capacity is 583.5 mg g −1 . Parameters affecting...
In our study BiMnO3 ceramics has been sintered. The X-ray diffraction test shown that the crystal lattice symmetry is monoclinic and centrosymmetric. Grain structure stoichiometry determined by scanning electron microscopy whereas local disorder photoemission spectroscopy. Leakage currents dominated D–E hysteresis loop. Electric conductivity measured in 85–770 K range. studied fresh shows semiconductor properties. Charge-order transition occurrence deduced. dc resistance switching occurs...
Graphene oxide modified with mercapto-groups for the preconcentration of copper, zinc, lead and chromium species prior to EDXRF determination in surface seawaters.
Investigations presented in the present work are concerning other member of Aurivillius family, BaBi2Nb2O9 (BBN). This compound, which seems to be very interesting from potential applications point view. The dielectric characterization this materials and influence sintering condition on grain structure properties those had been widely described our previous paper. Now we would like hitherto unreported electric ceramics, investigated by impedance spectroscopy (IS). IS is nondestructive...
Fluorescence-lifetime imaging microscopy (FLIM) was applied to investigate the donor distribution in SrTiO3 single crystals. On surfaces of Nb- and La-doped SrTiO3, structures with different fluorescence intensities lifetimes were found that could be related concentrations Ti3+. Furthermore, inhomogeneous donors caused a non-uniform conductivity surface, which complicates production potential electronic devices by deposition oxide thin films on top doped Hence, we propose FLIM as convenient...
Sodium niobate crystals doped with manganese ions, Na(NbMn)O3, were annealed in a nitrogen N2 flow at 600, 670, and 930 K. It was verified that simultaneous doping Mn ions annealing enhanced the photocatalytic features of sodium niobate. The transmission ultraviolet-visible range measured room temperature. absorbance edge is from 3.4 to 2.3 eV. optical band gap Egap = 1.2–1.3 eV evaluated using Tauc relation. Crystals 670 K exhibited an additional shift absorption ∼20–40 nm toward longer...
Bismuth manganite ceramics, consisted of two phases: cubic I23 and orthorhombic Pbam, were obtained by high-temperature sintering in the air. The powdered ceramics sintered gaseous nitrogen flow at stabilized temperature TS = 870–1120 K for 4 h. Grain structure chemical composition checked scanning electron microscopy (SEM). We observed changes grain shapes, number size hexagon-based parallelepipeds increased. X-ray diffraction (XRD) test has shown that BiMn2O5 phase formation was favored....
Atomic Force Microscopy (AFM) measurements have been performed for Fe-doped SrTiO3 thin films with an Fe concentration of 1 and 2 at%. Thin a thickness 15–50 nm were grown by pulsed laser deposition on single crystalline SrTi0.99Nb0.01O3 substrates. Low-energy electron diffraction examination showed that the are crystalline. The regions treated AFM tip (applied dc voltage up to 6 V) inhomogeneity electrical conductivity. Resistive switching was studied use local conductive atomic force...
A series of ZnCr2-xHoxSe4 microcrystalline spinels (where x = 0.05, 0.075, and 0.10) containing holmium ions in octahedral coordination were obtained by sintering adequate reactants at high temperatures. The doped materials characterized X-ray diffraction, Scanning Electron Microscopy, UV-Vis-NIR, molecular field approximation, XPS spectroscopies. Their thermal properties also investigated. doping the ZnCr2S4 matrix with paramagnetic Ho3+ a content not more than 0.1 screened 4f shell...
AbstractIn this paper, the resistance switching effect has been studied in NaNbO3:Mn crystals. Samples were rejuvenated ambient air, below and above antiferroelectric phase transition. Dielectric spectroscopy exhibited weak dispersion. The influence of annealing on electronic structure determined with use X-ray photoelectron spectroscopy. Na2s, Nb3d, O1s, Mn2p lines aged as-grown crystal samples spectra have analyzed. Nb4+ states observed point to presence oxygen vacancies surface layer. Na...