O. Yu. Semchuk
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View article: Resonance energy transfer from a dye to a carbon nanotube
Resonance energy transfer from a dye to a carbon nanotube Open
In this work, we have studied the process of energy transfer from a fluorophore to the electronic energy levels of a single-walled carbon nanotube. Recently, carbon nanotubes have attracted considerable attention due to a number of potenti…
View article: Unraveling the competition between charge and energy transfer in 0D/2D nanographene-graphene heterojunctions
Unraveling the competition between charge and energy transfer in 0D/2D nanographene-graphene heterojunctions Open
The charge and energy transfer processes in photoexcited 0D/2D donor/graphene heterojunctions occur through multiple different pathways. A donor deexcitation event occurring in the most prevalent Förster energy transfer mechanism (strongly…
View article: Unraveling the competition between charge and energy transfer in 0D/2D nanographene-graphene heterojunctions
Unraveling the competition between charge and energy transfer in 0D/2D nanographene-graphene heterojunctions Open
The charge and energy transfer processes in photoexcited 0D/2D donor/graphene heterojunctions occur through multiple different pathways. A donor deexcitation event occurring in the most prevalent Förster energy transfer mechanism (strongly…
View article: Inductive-resonance energy transfer in hybrid carbon nanostructures
Inductive-resonance energy transfer in hybrid carbon nanostructures Open
Based on the first principles, we have shown that the decisive role in energy transfer from the fluorophore molecule to the carbon substrate (graphene) is played by the Förster-type inductive-resonance energy transfer mechanism. The Förste…
View article: Creation of 3D-products using carbon nanostructures and 3D-printing technologies (FDM, CJP, SLA, SLS)
Creation of 3D-products using carbon nanostructures and 3D-printing technologies (FDM, CJP, SLA, SLS) Open
The article discusses methods for obtaining carbon nanostructures (CNS), as well as their use to create three-dimensional (3D) products using FDM, CJP, SLA, SLS technologies. The process of manufacturing consumables for 3D printing technol…
View article: Solubility of hydrogen in metals and their alloys
Solubility of hydrogen in metals and their alloys Open
The review material reveals the question of the influence of impurities on the physical properties of alloys, as well as the influence of gases on processes in alloys. It has been established that the presence of hydrogen affects diffusion…
View article: Kinetic theory of magnetic absorption of laser irradiation by nanoparticles
Kinetic theory of magnetic absorption of laser irradiation by nanoparticles Open
When metal nanoparticles (MNPs) are illuminated with a monochromatic laser wave, the frequency of which is far from the plasmon frequency (the frequency of plasmon resonances), under certain conditions (depending on the frequency of the wa…
View article: Carbon based hybrid nanomaterials: overview and challenges ahead
Carbon based hybrid nanomaterials: overview and challenges ahead Open
In recent years, many new materials have been developed and prepared to improve the performance of light-harvesting technologies and to develop new and attractive applications. The problem of stability of long-term operation of various opt…
View article: Kinetic theory of absorption of ultrashort laser pulses by ensembles of metallic nanoparticles under conditions of surface plasmon resonance
Kinetic theory of absorption of ultrashort laser pulses by ensembles of metallic nanoparticles under conditions of surface plasmon resonance Open
This paper presents a theory that allows one to calculate the energy absorbed by spheroidal metal nanoparticles when irradiated by ultrashort laser pulses of different duration in the region of surface plasmon resonance. Simple analytical …
View article: Modeling of optical characteristics of organic solar cells based on poly (3,4-ethylene dioxythiophene): polystyrene sulfonate with incorporated silver nanoparticles
Modeling of optical characteristics of organic solar cells based on poly (3,4-ethylene dioxythiophene): polystyrene sulfonate with incorporated silver nanoparticles Open
Changing the geometric parameters of the elements of the organic solar cell (OSC) and its components, changes in its optical characteristics such as reflection, absorption and transmission of light were studied. In the simulation, the main…
View article: Kinetic theory of electroconductivity of metal nanoparticles in the condition of surface plasmon resonance
Kinetic theory of electroconductivity of metal nanoparticles in the condition of surface plasmon resonance Open
View article: Kinetic theory of surface plasmon resonance in metal nanoparticles
Kinetic theory of surface plasmon resonance in metal nanoparticles Open
In recent years, interest in studying the optical properties of metallic nanostructures has grown. This interest is primarily related to the possibility of practical application of such nanostructures in quantum optical computers, micro- a…
View article: Width of the surface plasmon resonance line in spherical metal nanoparticles
Width of the surface plasmon resonance line in spherical metal nanoparticles Open
In recent years, there has been increasing interest in the study of the optical properties of metallic nanostructures. This interest is primarily related to the practical application of such nanostructures in quantum optical computers, mic…
View article: Physico-chemical properties and application of the conductive organic polymer poly-3,4 ethylenedioxythiophene-polystyrol sulfona
Physico-chemical properties and application of the conductive organic polymer poly-3,4 ethylenedioxythiophene-polystyrol sulfona Open
The history of the creation of conductive organic materials began in 1977, when, through the modification of polyacetylene, a material was created that conducts electricity almost as well as metals. These discoveries and other fundamental …
View article: Energy absorption of laser radiation by metal nanoparticles in the conditions of surface plasmon resonance
Energy absorption of laser radiation by metal nanoparticles in the conditions of surface plasmon resonance Open
A characteristic feature of metal nanoparticles is the dependence of their absorption of light (laser radiation) on the polarization of the wave and the shape of the particles, especially in the ultraviolet frequency range. Under the same …
View article: Electrical and optical properties of nanowires based solar cell with radial p-n junction
Electrical and optical properties of nanowires based solar cell with radial p-n junction Open
In our studies the absorption, transmittance and reflectance spectra for periodic nanostructures with different parameters were calculated by the FDTD (Finite-Difference Time-Domain) method.It is shown that the proportion of reflected ligh…
View article: Modeling optical spectra of periodic structures using the finite-difference time domain method
Modeling optical spectra of periodic structures using the finite-difference time domain method Open
The purpose of this article is to present theoretical calculations of the optical spectra of periodic silicon nanostructures dependent on their length. For calculations, the structure with silicon nanowires with a constant diameter and per…
View article: Laser-induced phase transition and ablation on the surface of solids (Review)
Laser-induced phase transition and ablation on the surface of solids (Review) Open
Phase transitions to be the basis of wide circle of processes of change of composition, structure and properties of materials flowing of that in time is determined by kinetics of transfer of warmth and mass in solids. By the basic distinct…
View article: Consideration of Boundary Conditions in the Scattering of Laser Radiation by Rough Fractal Surfaces
Consideration of Boundary Conditions in the Scattering of Laser Radiation by Rough Fractal Surfaces Open
The work within the scalar theory of Kirchhoff, solved the problem of scattering of laser light rough surface for the simulation which used two-dimensional modified Weierstrass function with a finite number of harmonics. Based on the analy…
View article: Absorption and relaxation of the laser pulse energy in substance (review)
Absorption and relaxation of the laser pulse energy in substance (review) Open
Each stage of interaction of laser radiation with the surface of the absorbing medium is considered in detail. First, processes occurring inside the electron and phonon subsystems are considered, then pulsed laser excitation and relaxation…
View article: THEORETICAL EVALUATION OF THE TEMPERATURE FIELD DISTRIBUTION IN THE SILICON PERIODIC NANOSTRUCTURES DURING THERMAL ANNEALING
THEORETICAL EVALUATION OF THE TEMPERATURE FIELD DISTRIBUTION IN THE SILICON PERIODIC NANOSTRUCTURES DURING THERMAL ANNEALING Open
Interesting direction of investigations is using surface-periodic structures in solar cells, because micrometer and nanometer periodic structures enlarge area of solar cells surface. At this, for using in solar cells, creation is proposed …
View article: Formation of Periodic Structures on the Solid Surface under Laser Irradiation
Formation of Periodic Structures on the Solid Surface under Laser Irradiation Open
Advances in the development of technologies aimed at the production of periodic structures on the surface of semiconductors, metals, and insulators have been reviewed. Particular attention was paid to the formation of periodic structures u…
View article: The peculiarity of absorption and emmision of light by free electrons in ferromagnetic semiconductors
The peculiarity of absorption and emmision of light by free electrons in ferromagnetic semiconductors Open
General expressions are got for an asorptance, and at presence of hot electrons, and for intensity of scattering light by free electrons in ferromagnetic semiconductors (FMSC) for a case, when dominant is electron-magnon interaction, in th…
View article: Theoretical and Experimental Investigations of Laser Annealing Non-Stoichiometric SiOx Films
Theoretical and Experimental Investigations of Laser Annealing Non-Stoichiometric SiOx Films Open
In this work, spreading of temperature profiles and influence of a temperature on forming silicon nanoparticles in non-stoichiometric SiOx films after laser annealing is investigated. Using parabolic thermal conductivity equation, mathemat…
View article: Kinetics of Interacting Quasi-Particles in Semiconductors in the Field of Coherent Light Beams
Kinetics of Interacting Quasi-Particles in Semiconductors in the Field of Coherent Light Beams Open
У дипольному наближенні та наближенні ефективної маси за допомогою нестаціонарного рівняння Шредінгера розраховано хвильову функцію електрона провідності в квазіоднорідному високочастотному електромагнітному полі. З використанням теорії кв…