A5030150698- Luminescence Properties of Advanced Materials
- Solid State Laser Technologies
- Laser-Ablation Synthesis of Nanoparticles
- Glass properties and applications
- Laser Material Processing Techniques
- Photorefractive and Nonlinear Optics
- Diamond and Carbon-based Materials Research
- Optical properties and cooling technologies in crystalline materials
- Nonlinear Optical Materials Studies
- Lanthanide and Transition Metal Complexes
- Graphene research and applications
- Perovskite Materials and Applications
- Quantum Dots Synthesis And Properties
- Laser-induced spectroscopy and plasma
- Radiation Detection and Scintillator Technologies
- Thermal Radiation and Cooling Technologies
- Catalytic Processes in Materials Science
- Crystal Structures and Properties
- Graphene and Nanomaterials Applications
- Microwave Dielectric Ceramics Synthesis
- Magnetic and transport properties of perovskites and related materials
- Solid-state spectroscopy and crystallography
- Ocular and Laser Science Research
- Carbon Nanotubes in Composites
- Advancements in Battery Materials
Polish Academy of Sciences
2016-2025
Włodzimierz Trzebiatowski Institute of Low Temperature and Structure Research
2016-2024
University of Wrocław
2015-2020
Institute of Physics
2020
National Academy of Sciences of Ukraine
2019-2020
Institute for Single Crystals
2019
University College London
2019
Institute of Electronic Materials Technology
2019
Université d'Angers
2019
College Track
2019
A new type of near infrared absorbing emitting (NANE) luminescent nanothermometer is presented, whose physical background relies on efficient and temperature dependent Nd<sup>3+</sup> to Yb<sup>3+</sup> energy transfer under 808 nm photo-excitation.
Abstract Laser induced white light emission was observed from porous graphene foam irradiated with a focused continuous wave beam of the infrared laser diode. It found that intensity increases exponentially increasing power density, having saturation level at ca. 1.5 W and being characterized by stable conditions. also is spatially confined to focal point dimensions illuminating light. Several other features were discussed. highly dependent on electric field intensity, allowing one modulate...
The luminescence spectral properties of La0.95Nd0.05MnO3 were investigated upon irradiation with a focused 808 nm CW (continuous wave) laser excitation. An anti-Stokes broadband emission in the visible range centered at 670 and Stokes band infrared around 2000 recorded. Their intensities increased exponentially excitation power. mechanism laser-induced is discussed terms an intervalence charge transfer involving Mn3+–Mn4+ ionic pair.
The laser induced white emission (LIWE) from Sr2CeO4 nanocrystals upon irradiation with a focused IR beam was investigated. It observed to be threshold phenomenon its intensity increasing exponentially the excitation power density. This process investigated under double simultaneous in UV range leading Stokes visible and anti-Stokes LIWE. With LIWE intensity, strongly decreased. is accompanied by efficient photocurrent generation depending on density followed multiphoton absorption...
Transparent light-converting ${\mathrm{Y}}_{3}{\mathrm{Al}}_{5}{\mathrm{O}}_{12}:\mathrm{Ce}$ (YAG:$\mathrm{Ce}$) ceramics have become promising materials for advanced light-emitting diode and laser-driven white-light-generation technology. However, their functionality is highly dependent on factors such as structural quality, uniformity of dopant distribution, the presence defects, cost fabrication. The emission YAG:$\mathrm{Ce}$ remains thermally stable when high-power-density laser...
This paper focuses on the kinetics of Cr4+ formation in Cr,Ca:YAG ceramics prepared by solid-state reaction sintering. The was studied annealing ambient air under different temperatures at times, resulting transformation Cr3+ to Cr4+. activation energy (Ea) oxidation determined Jander model 2.7 ± 0.2 eV, which is good correlation with innergrain oxygen diffusion YAG lattice. It concluded that limited through grain body. established ceramics, intralattice cation exchange, ions exchange...
In order to obtain Gd2.97Pr0.03Ga3Al2O12 powders with different crystallite sizes, a modified Pechini (sol–gel) method was used. Powders were then used for the preparation of ceramics by high-pressure low-temperature sintering method. The impact size and pressure applied during procedure on conventional persistent luminescence investigated analyzed. It found that emission color is strictly dependent size, as such phenomenon may be in field advanced anti-counterfeiting. spectroscopic...
Abstract In the present work, influence of Cr and Ca co‐additives on phase formation under conditions emulated real sintering process 4+ : YAG ceramics is studied. The XRD analysis treated samples revealed difference in rates intermediate phases between with without 2 O 3 additive. solid‐state reaction Y Al observed to shift toward higher temperatures (ie, stage fast shrinkage) if mixture CaO added. reason for such appearance new intermediate, which contains ions perovskite structure, as has...
Along with the ongoing developments in field of luminescence thermometry, especially concerning ratiometric methods, opportunity presents itself to broaden scope their application potential.
Abstract In this work we report the white light emission in transparent Cr:YAG ceramic pellet upon irradiation with focused beam of CW infrared laser diode. It was found that phenomenon is specifically related to interaction a surface pellet. The emitted outside an irradiated spot at and did not penetrate inside Moreover, red two-photon absorption along penetrating Cr 3+ :YAG observed. Interaction leads efficient from outer side resulting entry back Multiphoton ionization leading...
Focused 808 nm excitation was able to produce bright warm white light from La 1-x Nd x AlO 3 nanocrystals. The concentration of 3+ influenced the intensity dependence on power and pressure along with photoconductivity. An IVCT mechanism proposed.
Graphene nanoplatelets (GNPs) were prepared using the electrolytic exfoliation method on graphite foil in an ammonium sulfate solution. A series of experiments conducted order to optimize production flakes by varying pH solution, applied voltage and current, duration electrolysis, temperature system, type ultrasound interaction. The quality produced graphene was analyzed X-ray diffraction, Raman IR spectroscopy, TEM.
This paper presents the synthesis and characterization of graphene–polymer composites, focusing on their mechanical antibacterial properties. Graphene flakes were obtained via an electrochemical method integrated into polyamide 6 (PA6) matrices using melt intercalation. Various techniques confirmed quality graphene flakes, including X-ray diffraction (XRD), Raman spectroscopy, infrared (IR) as well scanning transmission electron microscopy (SEM TEM) imaging. Mechanical tests showed increase...