A5083980516- Spectroscopy and Quantum Chemical Studies
- Luminescence Properties of Advanced Materials
- Photochemistry and Electron Transfer Studies
- Molecular Junctions and Nanostructures
- Advanced Chemical Physics Studies
- Theoretical and Computational Physics
- Glass properties and applications
- Photorefractive and Nonlinear Optics
- Lanthanide and Transition Metal Complexes
- Inorganic Fluorides and Related Compounds
- Economic and Business Development Strategies
- Electrochemical Analysis and Applications
- Atmospheric chemistry and aerosols
- Mechanical Engineering and Vibrations Research
- Soil Mechanics and Vehicle Dynamics
- Ferroelectric and Piezoelectric Materials
- Technical Engine Diagnostics and Monitoring
- Microwave Dielectric Ceramics Synthesis
- Advanced Thermodynamics and Statistical Mechanics
- Economic Issues in Ukraine
- nanoparticles nucleation surface interactions
- Solid State Laser Technologies
- Advanced Manufacturing and Logistics Optimization
- Optical properties and cooling technologies in crystalline materials
- Quantum Mechanics and Applications
Institute of Chemical Kinetics and Combustion
2013-2024
Siberian Branch of the Russian Academy of Sciences
2006-2022
Kyiv National University of Construction and Architecture
2022
Ukrainian State University of Railway Transport
2019
Russian Academy of Sciences
2007
Novosibirsk State University
2005
In technology we widely use semi-Markov processes, because with their help someone can model a large number of production systems. For increasing automated flexibility and reliability workers storage devices in different roles, such as inter- operational buffers conveyor production, loading unloading solutions, modules the ability to store products, etc. On other hand, during operation, off-cycle time losses (downtime) occur, which have significant impact on system. this regard, problems...
We use two water based synthetic approaches to LaF3:Nd3+ nanoparticles (NPs), hydrothermal microwave treatment (HTMW) and co-precipitation (CO) technique, with different temperature of the reaction mixture study correlation between degree crystallinity NPs their fluorescence properties. showed that spectra quenching kinetics can be a powerful tool reveal crystal lattice defects, namely agglomerations dopant ions (Nd3+) OH− positioned in volume doped NPs. found reduced number such defects as...
The differential and integral binary theories of hopping quenching were used to calculate the kinetics, its stationary rate, luminescence quantum yield assuming Markovian random walk excitation dipole–dipole energy transfer acceptors. It is shown that theory results are not valid for high concentration acceptors, however, kernel (mass operator) defined. On contrary, which exact immobile donors as well so-called Burshtein model, appropriate at least useful interpolations between ‘‘migration...
The competence of the reversible exciplex formation and parallel quenching excitation (by electron or energy transfer) was considered using a non-Markovian pi-forms approach, identical to integral encounter theory (IET). General equations accounting for are derived in contact approximation. Their general solution obtained adopted most common case when ground state particles great excess. Particular cases only photoionization just separately studied earlier by means IET reproduced. In...
The impurity quenching of incoherent excitation accelerated by resonance migration in solid solutions is studied. It shown that a lower bound for the survival probability N(t) established so-called encounter theory, which linear quencher concentration and predicts an exponential decay at end migration-accelerated stage following short static decay. Another bound, not leaving site where was initially created, decays much more slowly very process. crossover point these bounds establishes upper...
Photoinduced charge transport in lithium niobate for standard illumination, composition and temperature conditions occurs by means of small polaron hopping either on regular or defective lattice sites. Starting from Marcus-Holstein’s theory frequency we draw a quantitative picture illustrating two underlying microscopic mechanisms besides experimental observations, namely direct trapping migration-accelerated transport. Our observations will be referred to the typical outcomes transient...
The excitation quenching by reversible exciplex formation, combined with irreversible but distant electron transfer, is considered means of the integral encounter theory (IET). Assuming that quenchers are in great excess, set IET equations for excitations, free ions, and exciplexes derived. Solving these gives Laplace images all populations, used to specify quantum yields corresponding reaction products. It appears diffusion facilitates production transfer. On other hand stronger transfer...
Two series of stable aqueous colloidal solutions Nd3+: LaF3 single-phase well-crystallized nanoparticles (NPs), possessing a fluorcerite structure with different activator concentrations in each series, were synthesized. A hydrothermal method involving microwave-assisted heating (HTMW) two Berghof speedwave devices equipped one magnetron (type I) or magnetrons II) was used. The average sizes NPs are 15.4 ± 6 nm and 21 7 II). Both types have size distribution that is well described by double...
Creation of exciplexes from the charged products photoionization is considered by means Integral Encounter Theory. The general kinetic equations such a reaction following Weller scheme II are developed. special attention given to particular case irreversible remote ionization primary excited electron donor. Kinetics exciplex formation at fast biexponential geminate transformation in cage that gives way subsequent bulk equilibrated controlled power law recombination ions. It shown initial...
An original method was proposed to reduce the quenching of NIR fluorescence colloidal solutions 0.1 at. % Nd3+: LaF3 nanoparticles (NPs) synthesized by aqueous co-precipitation followed hydrothermal microwave treatment. For this, an solution NPs precipitated centrifugation and dissolved in same volume DMSO. The kinetics static Nd3+ donors doped dispersed two solvents analyzed determine compare concentrations OH- acceptors uniformly distributed throughout NPs. dependences relative quantum...