Papers by Alexey Kucherik
Bulletin of the Russian Academy of Sciences: Physics
2018 International Conference Laser Optics (ICLO), 2018
The formation of hybrid silicon-gold NPs as a result of the laser action on a mixed colloidal sol... more The formation of hybrid silicon-gold NPs as a result of the laser action on a mixed colloidal solution is observed. These hybrid NPs are characterized by the amplification and broadening of the near-field photoluminescence spectra compared to pure silicon NPs. A strong sensitivity of the spectral shape of the emitted light to the intensity of the exciting white light is documented. These results may be used for the realization of functional metasurfaces consisting of randomly distributed resonant NPs. Moreover, as the synthesized NPs emit in red, green and yellow they can be used for fabrication of luminescent color screens.
2016 International Conference Laser Optics (LO), 2016
In this work a method for the laser formation of C-Au-Ag clusters and complexes on the surface of... more In this work a method for the laser formation of C-Au-Ag clusters and complexes on the surface of an optically transparent media is discussed.
2018 International Conference Laser Optics (ICLO), 2018
Metal-carbon materials realize surface-enhanced Raman scattering. Such structures were synthesize... more Metal-carbon materials realize surface-enhanced Raman scattering. Such structures were synthesized using the laser irradiation of colloidal systems consisting of carbon and noble metal nanoparticles.
2017 Progress In Electromagnetics Research Symposium - Spring (PIERS), 2017
The drop deposition of colloidal nanoparticles was performed from water-based colloidal solutions... more The drop deposition of colloidal nanoparticles was performed from water-based colloidal solutions. The proposed procedure is based on the agglomeration of colloidal particles in evaporation processes. The evaporation process was resulted in the formation of clustered thin films on a glass substrate. In the experiments with bimetallic Au:Ag solutions, the clustered films are grown, the formation of the clustered films with the average height of 100 nm was achieved. Optical properties of the deposited structures were investigated experimentally. It is shown that the obtained films may become transparent and their properties are defined by their morphology.
Journal of Physics: Conference Series, 2019
This article presents the results of experimental studies on obtaining and measuring the electron... more This article presents the results of experimental studies on obtaining and measuring the electronically conductive properties of island semiconductor plumbum telluride nanofilms, as well as modeling their conductive properties within the hopping conductivity model and the classical model taking into account the structure within the DLA model using graph theory methods.
Journal of Physics: Conference Series, 2019
Titanium oxide films are photosensitive they have unusual optical properties. This article repres... more Titanium oxide films are photosensitive they have unusual optical properties. This article represents the possibility of the TiO objects (rolls) obtaining with predetermined optical parameters. The article also includes the comparison between numerical and physical experiments.
IOP Conference Series: Materials Science and Engineering, 2020
We used the nonlinear hydrodynamic model of the motion of molten flows to determine the basic geo... more We used the nonlinear hydrodynamic model of the motion of molten flows to determine the basic geometric characteristics of the resulting coatings in a laser experiment. To test the capabilities of the developed algorithm, a series of calculations was performed for various values of Reynolds numbers (Re) and certain sizes of the computational domains with several cavities with different configurations. The influence of the channel geometry is clearly noticeable in the case of a deep depression. The direction of motion of different structures (e.g. the vortex) was predicted. Using the convection model, we estimate the temperature field and velocity distribution in the system under consideration for various initial conditions and experimental regimes selected. The profile of the arising island on the surface was modeled by a scaling computational domain with the number of particles N = pS, where the parameter p – determined the viscosity of melted material, and S - the area of the comp...
Journal of Physics: Conference Series, Nov 1, 2019
<jats:title>Abstract</jats:title> <jats:p>In the framework of this paper, the r... more <jats:title>Abstract</jats:title> <jats:p>In the framework of this paper, the results of experimental studies on the production of thin labyrinth bimetallic films, as well as measurement of ampere characteristics from volts, are presented. In addition, the simulation of their electrically conductive properties is done.</jats:p>
Journal of Physics: Conference Series, 2018
Metal-carbyne materials, synthesized by laser irradiation of colloidal systems consisting of carb... more Metal-carbyne materials, synthesized by laser irradiation of colloidal systems consisting of carbon and noble metal nanoparticles, are promising objects to realize surfaceenhanced Raman scattering. The dependence of the Raman scattering intensity of the material composition has been investigated. The possibility of detecting of the organic dye Rhodamine 6G Raman spectrum was demonstrated.
Optical and Quantum Electronics, 2017
By method of laser-induced thermal deposition of colloidal particles laser we have produced the m... more By method of laser-induced thermal deposition of colloidal particles laser we have produced the metallic granular films for which the ability to control the change in its electrical properties does exist by variation of the topology for the system. The quantum states verification in cluster metallic structures by jump/tunneling electroconductivity and possible mechanisms for its implementation are considered in experiment and theory. The granular conductivity specificity has been under study. The current-voltage characteristics behavior has been measured for a gold (Au) and Au-carbyne clustered film. Two associated mechanisms for electroconductivity occur in the case, i.e. tunnel transition for electrons and electron activation in the frames of the shell model for a cluster system, in dependence on the nanostructure topology. Keywords Electroconductivity Á Tunneling Á Nanocluster structures Á Jump electroconductivity Á Topology control This article is part of the Topical Collection on Fundamentals of Laser Assisted Micro-and Nanotechnologies.
Journal of Surface Investigation. X-ray, Synchrotron and Neutron Techniques, 2015
We present the experimental and theoretical results of the study of laser modification of the sol... more We present the experimental and theoretical results of the study of laser modification of the solid phase of thin epitaxial films of lead telluride under continuous irradiation. An ensemble of nanoparticles with bimodal distribution depending on the laser power, beam diameter, and scanning rate of the surface is formed under laboratory conditions The process of the laser heating of a thin film is simulated, and the change in the temperature field, depending on the conditions of laser exposure, is described. The experimental results are interpreted based on the defect–deformation theory of the formation of a bimodal ensemble of nanoparticles under continuous laser irradiation. The diffusion model of cluster growth in the bulk and on the surface of a thin film demonstrates the possibility of forming a bimodal size distribution of clusters.
Optics and Spectroscopy, 2016
Metal-carbon materials exhibiting surface-enhanced Raman scattering have been synthesized by lase... more Metal-carbon materials exhibiting surface-enhanced Raman scattering have been synthesized by laser irradiation of colloidal systems consisting of carbon and noble metal nanoparticles. The dependence of the Raman scattering intensity on the material composition and laser irradiation conditions has been investigated. The possibility of recording the Raman spectrum of organic dye rhodamine 6G, deposited in amount of 10-6 M on the substrate obtained from a colloidal solution is demonstrated.
Journal of Nanoparticle Research, 2016
We report the results of continuous wave laser interactions with both gold and silver targets in ... more We report the results of continuous wave laser interactions with both gold and silver targets in the presence of different liquids (deionized water, ethanol, and glycerol). Upon moderate laser irradiation at wavelength of 1.06 nm during 30 min, nanoparticle colloids are shown to be formed with surprisingly narrow size distributions and average dispersion as small as 15-20 nm. The average particle sizes range between 8 and 52 nm for gold and between 20 and 107 nm for silver. This parameter is shown to be stable and well-controlled by such laser parameters as intensity and effective irradiation time, as well as by the choice of the liquid phase. The possibilities of an efficient control over the proposed synthesis techniques are discussed, and the results of a bimetallic Au-Ag structure deposition from the obtained colloids are presented. The formation of the extended arrays of gold and silver nanoparticles with controlled morphology is examined. The changes in the optical properties of the obtained thin films are found to depend on their morphology, in particular, on the particle size, and distance between them.
2016 International Conference Laser Optics (LO), 2016
In this work, we investigated the influence of morphology (particle diameter in the colloid, the ... more In this work, we investigated the influence of morphology (particle diameter in the colloid, the distance between the deposited particles, the number of layers etc.) on the optical and electrical properties of the deposited thin film of bimetallic clusters.
Nanophotonics VI, 2016
Synthesis of transparent conductive coatings is a promising direction of modern nanotechnological... more Synthesis of transparent conductive coatings is a promising direction of modern nanotechnological research. Thin nanostructured noble-metallic films demonstrate nonlinear optical effects in visible spectral range because of their plasmonic properties [1]. In addition, optical characteristics of these thin films strongly depend on the period of the formed surface structures [2]. If the distance between deposited particles almost equals their sizes, the optical properties of the randomly deposited structures may considerably differ from these for periodical structures [3]. In this work, we have studied the degree of the morphology influence (particle diameter in the colloid, the distance between the deposited particles, the number of layers etc.) on the optical and electrical properties of the deposited thin film of bimetallic gold and silver clusters. In this work we used CW-laser with moderate intensity in liquid (water or ethanol) for synthesis nanoparticles of noble metals. For the formation of quasi-periodically arranged clusters, particle deposition from the colloidal systems is used. The optical properties of the deposited bimetallic films are shown to change as a function of composition and geometry in agreement with the modeling of the optical properties.
SPIE Proceedings, 2016
Gold nanoparticles (Au NPs) attract particular attention because of their unique size-dependent c... more Gold nanoparticles (Au NPs) attract particular attention because of their unique size-dependent chemical, physicochemical and optical properties and, hence, their potential applications in catalysis, nanoelectronics, photovoltaics and medicine. In particular, laser-produced colloidal nanoparticles are not only biocompatible, but also reveal unique chemical properties. Different laser systems can be used for synthesis of these colloids, varying from continuous wave (CW) to ultra-short femtosecond lasers. The choice of an optimum laser system is still a challenge in application development. To bring more light at this issue, we investigate an influence of laser parameters on nanoparticle formation from a gold target immersed in deionized water. First, an optical diagnostics of laser-induced hydrodynamic processes taking place near the gold surface is performed. Then, gold nanoparticle colloids with average particle sizes smaller than 10 nm and a very narrow dispersion are shown to be formed by CW laser ablation. The obtained results are compared with the ones obtained by using the second harmonics and with previous results obtained by using femtosecond laser systems.
Uploads
Papers by Alexey Kucherik