A5039094258- Catalytic Processes in Materials Science
- Luminescence Properties of Advanced Materials
- Catalysis and Oxidation Reactions
- Quantum Dots Synthesis And Properties
- Laser-Ablation Synthesis of Nanoparticles
- Glass properties and applications
- Advanced Photocatalysis Techniques
- Electrocatalysts for Energy Conversion
- Chalcogenide Semiconductor Thin Films
- Bone Tissue Engineering Materials
- Diamond and Carbon-based Materials Research
- Copper-based nanomaterials and applications
- Nanocluster Synthesis and Applications
- Advanced Nanomaterials in Catalysis
- Luminescence and Fluorescent Materials
- Laser Material Processing Techniques
- nanoparticles nucleation surface interactions
- Random lasers and scattering media
- Graphene research and applications
- Thermal properties of materials
- Nuclear materials and radiation effects
- Gas Sensing Nanomaterials and Sensors
- Metal and Thin Film Mechanics
- Nonlinear Optical Materials Studies
- Advanced materials and composites
Polish Academy of Sciences
2016-2025
Włodzimierz Trzebiatowski Institute of Low Temperature and Structure Research
2018-2025
Wroclaw University of Applied Informatics "Horizon"
2018
National Academy of Sciences of Ukraine
2014-2015
Institute for Single Crystals
2013-2015
Functional colloidal nanoparticles capable of converting between various energy types are finding an increasing number applications. One the relevant examples concerns light-to-heat-converting that may be useful for localized photothermal therapy cancers. Unfortunately, quantitative comparison and ranking nanoheaters not straightforward as materials different compositions structures have photophysical chemical properties interact differently with biological environment. In terms properties,...
Pure and Pr
Ru evaporation from the surface of a Ru/CeO 2 catalyst is demonstrated.
Complex luminescence, structure (powder XRD, Raman spectroscopy), and reducibility (NAP-XPS H2-TPR) studies carried out on classic ceria-based materials have allowed us to develop a new luminescence-based technique for fast monitoring of the chemical state ceria catalyst under operating conditions. The proposed approach involves remote structural probe based Eu3+ luminescence Ce3+/Ce4+ ratio in matrix─a crucial factor determining catalytic activity materials. sensitivity, readout mode,...
The influence of synthesis conditions on morphology and structure CeO 2 nanocrystals prepared by microwave‐assisted hydrothermal method were studied XRD, TEM, Raman spectroscopy photoluminescence measurements. Decisive effect the OH ‐ /Ce 3+ molar ratio in reaction mixture size shape was established explained. Rise concentration groups at surface growing promotes transformation from irregular (spheroidal) to cube enables oriented attachment mode particle growth. I found that unit cell...
Understanding how reaction conditions affect metal-support interactions in catalytic materials is one of the most challenging tasks heterogeneous catalysis research. Metal nanoparticles and their supports often undergo changes structure oxidation state when exposed to reactants, hindering a straightforward understanding structure-activity relations using only ex situ or ultrahigh vacuum techniques. Overcoming these limitations, we explored interaction between gold ceria after exposure CO. A...
Complementary structure (powder XRD and STEM), reducibility (NAP-XPS H2-TPR), luminescence studies of Eu-doped ceria nanocrystals 11–102 nm in size have allowed to determine the advances limitations a new luminescence-based technique for fast remote monitoring Ce3+/Ce4+ ratio ceria-based materials─a key factor determining functional properties CeO2-based group catalysts. In addition, combination SEM-EDS UHV-XPS indicated presence segregation Eu on surface nanoparticles, which significantly...
This work investigates the surface chemistry of Ru/CeO2 catalyst under varying pretreatment conditions and during oxidation propane, focusing on both dry humid environments. Our results show that calcined in O2 at 500 °C initiates propane 200 °C, achieves high conversion rates above 400 demonstrates almost no change activity presence water vapor across entire studied temperature range 200–500 °C. Prereduction oxidized H2 significantly enhances its activity, though this enhancement diminishes...
The ordering of oxygen vacancies (in high Eu-doped (<italic>x</italic> ≥ 0.1) ceria nanoparticles) facilitates the process Ce<sup>4+</sup> to Ce<sup>3+</sup> reduction.
In this work, we prepared and investigated in ultra-high vacuum (UHV) two stoichiometric CeO2(111) surfaces containing low high amounts of step edges decorated with 0.05 ML gold using synchrotron-radiation photoelectron spectroscopy (SRPES) scanning tunneling microscopy (STM). The UHV study helped to solve the still unresolved puzzle on how one-monolayer-high ceria affect metal–substrate interaction between Au surface. It was found that concentration ionic Au+ species surface increases...
Control of metal–support interactions is one the major challenges in heterogeneous catalysis. In this study, we explored effect Eu doping on Au/Ce1–xEuxO2 catalysts applied oxidation CO. We probe with CO under realistic conditions by near-ambient-pressure X-ray photoelectron spectroscopy (NAP-XPS) and situ diffuse reflectance infrared Fourier transform (DRIFTS). NAP-XPS allows investigation surface reducibility ceria support charging Au nanoparticles. Both parameters are crucial, as they...
The aim of this research was to investigate the photothermal ability nanocrystalline hydroxyapatite (nHAp) incorporated with silver and gold. It studied by using a recently developed technique evaluating conversion efficiency. heating performance aqueous dispersions examined under 445 532 nm excitation. largest increase in temperature found for 2% Ag-nHAp reached above 2 °C per mg/mL sample (445 nm) 90 mW laser continuous irradiation an external light-to-heat efficiency 0.11 L/g cm. obtained...
Multicolor photon avalanche emission of Pr 3+ doped NaYF 4 nanocrystals under 852 nm excitation is enabled by co-doping sensitizer Yb ions.
We demonstrate a low-temperature synthesis of hydrophilic, penicillamine-stabilized hybrid CdS-Au nanoparticles (NPs) utilizing different Au concentrations. The obtained nanomaterials exhibit photoluminescence quenching and emission lifetime reduction in comparison with their raw semiconductor CdS NPs counterparts. An increase concentration present at the surface leads to lower intensity faster decays, suggesting more efficient charge separation when larger domains are present. For...
Lanthanide (Ln)-doped upconverting nanocrystals (LnNPs) exhibit suitable features as energy donors for Förster resonance transfer (FRET). The sensitivity of biosensors can be improved by optically active materials with anti-Stokes emission, narrowband absorption and emission spectral lines, long luminescence lifetimes. In contrast to reabsorption, between the upconversion (UCNPs) organic dyes attached their surface observed through donor quenching acceptor decreases in lifetimes donors....
Abstract Hydroxyapatite is one of the most widely used materials in biomedical applications reparative and regenerative medicine. Doping nanosized hydroxyapatite improves its bioactive properties, thus, synthesis different types nanohydroxyapatite with antimicrobial activity a perspective route modern science. In this study, undoped (HAp), doped silver (HAp 0.1, 0.5 1 mol% Ag + ions), silicate-substituted (Si-HAp ions) nanoparticles (NPs) were synthesized by microwave-assisted hydrothermal...
This work aims to investigate a possible strategy enhance the nonlinear optical absorption in well-known group of defect-rich ternary AgInS 2 quantum dots.