A5022829602- Electron and X-Ray Spectroscopy Techniques
- X-ray Spectroscopy and Fluorescence Analysis
- ZnO doping and properties
- Chalcogenide Semiconductor Thin Films
- Semiconductor materials and interfaces
- Semiconductor materials and devices
- Quantum Dots Synthesis And Properties
- X-ray Diffraction in Crystallography
- Metal and Thin Film Mechanics
- Advanced Chemical Physics Studies
- Magnetic properties of thin films
- Boron and Carbon Nanomaterials Research
- Electronic and Structural Properties of Oxides
- GaN-based semiconductor devices and materials
- Crystallization and Solubility Studies
- Advanced Materials Characterization Techniques
- Silicon Nanostructures and Photoluminescence
- Semiconductor Quantum Structures and Devices
- Magnetic and transport properties of perovskites and related materials
- Bone Tissue Engineering Materials
- Intermetallics and Advanced Alloy Properties
- Surface and Thin Film Phenomena
- Advancements in Battery Materials
- nanoparticles nucleation surface interactions
- Ferroelectric and Piezoelectric Materials
Institute of Physics
2014-2024
Polish Academy of Sciences
2015-2024
Le Mans Université
2008
Centre National de la Recherche Scientifique
2008
University of Duisburg-Essen
2008
Shimane University
2008
University College London
2008
Case Western Reserve University
1997
Lawrence Berkeley National Laboratory
1996-1997
University of California, Berkeley
1996
Our study reports the ultrasound-assisted synthesis of SnS and SnS2 in form nanoparticles using aqueous solutions respective tin chloride thioacetamide varying sonication time. The presence both compounds is confirmed by powder X-ray diffraction, energy-dispersive spectroscopy, as well Raman FT-IR spectroscopic techniques. existence proven diffraction investigation high resolution transmission electron microscopy observations. size nanocrystallites are range 3–8 nm 30 50 for SnS, 1.5–10...
A comprehensive study of the electronic structure group-III nitrides (AlN, GaN, InN, and BN) crystallizing in wurtzite, zinc-blende, graphitelike hexagonal (BN) structures is presented. large set x-ray emission absorption spectra was collected at several synchrotron radiation facilities installations offering highest possible energy resolution. By taking advantage linear polarization making careful crystallographic orientation samples, bonds along c axis $(\ensuremath{\pi})$ ``in plane''...
The local order around Mn atoms in the Mn-implanted Si samples, with ferromagnetic properties, has been investigated by use of x-ray-absorption spectroscopy techniques. Analysis both extended fine structure and x-ray absorption near-edge spectra clearly indicates that ions are located neither substitutional nor interstitial position lattice, but depending on how samples were prepared, they have five to eight near neighbors.
The iron crosslinked chitosan (Ch-Fe-CL) and N-carboxylmethyl (N-CM-Ch-Fe) complexes were studied by complementary techniques: structurally sensitive Mössbauer X-ray absorption methods, as well static magnetic measurements. A detailed consistent description of these including, besides the overall behavior, spin ordering local atomic structure around Fe ions is presented. atoms in investigated samples are mostly penta-coordinated appear a high Fe3+ ionic state. In Ch-Fe-CL, two kinds near...
The development of the field biomaterials engineering is rapid. Various bioactive coatings are created to improve biocompatibility substrates used for bone regeneration, which includes formulation thin zirconia with pro-osteogenic properties. aim this study was assess biological properties ZrO2 films grown by Atomic Layer Deposition (ALD) technology (ZrO2ALD).The cytocompatibility obtained layers analysed using mice pre-osteoblastic cell line (MC3T3) characterized decreased expression...
X-ray absorption near edge structure (XANES) at the cadmium ${L}_{3}$ and oxygen $K$ edges for CdO thin films grown by pulsed laser deposition method, is interpreted within real-space multiple scattering formalism, FEFF code. The features in experimental spectra are well reproduced calculations a cluster of about six ten coordination shells around absorber Cd O, respectively. calculated projected electronic density states found to be good agreement with unoccupied data allows conclude that...
Recently, extreme ultraviolet (EUV) radiation has been increasingly used to modify polymers. Properties such as the extremely short absorption lengths in polymers and very strong interaction of EUV photons with materials may play a key role achieving new biomaterials. The purpose study was examine impact on cell adhesion surface modified that are widely medicine: poly(tetrafluoroethylene) (PTFE), poly (vinylidene fluoride) (PVDF), poly-L-(lactic acid) (PLLA). After modification, which...
We report details on the synthesis and properties of barium praseodymium tungstate, Ba2PrWO6, a double perovskite that has not been synthesized before. Room-temperature (RT) powder X-ray diffraction identified most probable space group (SG) as monoclinic I2/m, but it was only slightly distorted from cubic structure. photoelectron spectroscopy confirmed initial (postsynthesis) material contained in both 3+ 4+ charge states. The former (Pr3+) disappeared after exposure to UV light at RT....
Double metal cyanide (DMC) catalysts are commonly applied at industrial ring‐opening polymerization of the epoxides, being initial stage polyurethanes manufacturing route. This group is frequently used in industry, but knowledge on molecular nature their high activity and selectivity limited to some phenomenological hypotheses based overall chemical premises. To shine light relation between structural properties DMC activity, complementary X‐ray powder diffraction, photoelectron...
SnS and SnS2 powders were synthesized with the use of ultrasound. The indirect sonication was applied ultrasound frequency 40 kHz acoustic power 38 W/L. Products syntheses examined PXRD, TEM, EDX, XPS, UV–Vis (the Tauc method) investigations. resulting microparticles used for tip coating copper cathodes. These electrodes in degradation model azo-dye Metanil Yellow by electro-Fenton process. efficiencies using copper, SnS-coated SnS2-coated cathodes are compared. Kinetics process application...
Numerous efforts have already been made to optimize nitridation of crystalline sapphire (c-Al2O3) substrates whereas very little attention has paid amorphous aluminum oxide layers (a-AlO x ). An extensive analysis the reaction films with nitrogen species is thus needed clarify mechanisms incorporation into such and control their properties. In this work X-ray photoelectron spectroscopy was used determine chemical state formed by plasma treatment c-Al2O3 15 nm thick a-AlO grown atomic layer...
Atomic layer deposition (ALD) technology has started to attract attention as an efficient method for obtaining bioactive, ultrathin oxide coatings. In this study, using ALD, we have created titanium dioxide (TiO2) layers. The coatings were characterised in terms of physicochemical and biological properties. chemical composition coatings, well thickness, roughness, wettability, was determined XPS, XRD, XRR. Cytocompatibillity ALD TiO2 accessed applying model mouse pre-osteoblast cell line...
The energy distribution of the nitrogen antibonding electron states in hexagonal epitaxial layers AlN, GaN, and InN cubic GaN along pxy plane pz direction is reported. study was performed by polarized x-ray absorption at K edge N. A strong polarization dependence spectra indicating significant anisotropy conduction band found case samples. Very weak dependencies observed samples correspond well with defect anisotropy. Qualitatively different cation dependent point out role played a...
A comprehensive study of the nitrogen K edge and gallium ${\mathrm{M}}_{2,3}$ in nitride is presented. Results two different experimental techniques, x-ray absorption by total photocurrent measurements glancing-angle reflectivity, are presented compared with each other. First-principles calculations (polarization averaged) dielectric response ${\mathrm{\ensuremath{\epsilon}}}_{2}$(\ensuremath{\omega}) contributions from relevant core-level to conduction-band transitions derived spectral...
The objective of the study was to modify surface silicone rubber, using dielectric barrier discharge (DBD) improve its hydrophilic properties. influence exposure time, power, and gas composition—in which generated—on properties layer were examined. After modification, wetting angles measured. Then, value free energy (SFE) changes in polar components modified over time determined Owens–Wendt method. surfaces morphology selected samples before after plasma modification examined by...
Despite of intensive search for the proper semiconductor base materials spintronic devices working at room temperature no appropriate material based on ferromagnetic semiconductors has been found so far. We demonstrate that phase segregated system with MnSb hexagonal inclusions inside GaSb matrix, formed directly during molecular beam epitaxial growth reveals properties and is a good candidate exploitation in spintronics. Furthermore, only one crystalline structure were identified this...
Due to increasing aging of population prevalence age-related disorders including osteoporosis is rapidly growing. health and economic impact the disease, there an urgent need develop techniques supporting bone metabolism regeneration after fracture. imbalance between forming resorbing cells, healing process osteoporotic problematic prolonged. Thus searching for agents able restore homeostasis these cells strongly desirable. In present study, using ALD technology, we obtained homogeneous,...
X-ray absorption spectroscopy is used to determine the local atomic structure around iron atom from a soluble synthetic analogue of malaria pigment (hemozoin), cf. ferrimesoporphyrin IX mesohematin anhydride, in absence or presence chloroquine (CQ) dimethyl sulfoxide (DMSO). Of particular note are CQ-induced changes which might confirm formation CQ−ferrimesoporphyrin complex. Examination solutions anhydride dissolved DMSO reveals preservation dimerlike with central atoms ferric porphyrin...
Abstract Granular GaAs:(Mn,Ga)As films were prepared by annealing the Ga 0.985 Mn 0.015 As/GaAs layers at 500 °C or 600 °C. It is commonly accepted that this processing should result in formation of cubic hexagonal MnAs clusters, respectively. We demonstrate such a priori assumption not justified. If as grown sample there are many defects with interstitial atoms, only small clusters can be formed even after Moreover, containing solely GaMnAs ions ferromagnetically coupled room temperature....
The experimental and theoretical studies of the local atomic order chemical binding in tantalum oxide amorphous films are presented.
This comprehensive work showcases two novel, rock-salt-type minerals in the form of amphoteric cerium-tungstate double perovskite and ilmenite powders created via a high-temperature solid-state reaction inert gases. The presented studies have fundamental meaning will mainly focus on detailed synthesis description undoped structures, researching their possible polymorphism various conditions hinting at some nontrivial physicochemical properties like charge transfer for upcoming optical after...