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January 2013 - present
January 1996 - present
Education
September 1995 - June 2000
Publications
Publications (136)
There has been a lot of study and advancement in the area of carbon allotropes in the last several decades, driven by the exceptional and diverse physical and chemical characteristics of carbon nanomaterials. For example, nanostructured forms such as carbon nanotubes (CNTs), graphene, and carbon quantum dots have the potential to revolutionize vari...
Supplemetary materials to our PRL paper, A. Kucherik, A. Osipov, V. Samyshkin, R. R. Hartmann, A. V. Povolotskiy, and M. E. Portnoi "Polarization-Sensitive Photoluminescence from Aligned Carbon Chains Terminated by Gold Clusters" Phys. Rev. Lett. 132, 056902 (2024).
We synthesize a thin film composed of long carbyne chains terminated by gold clusters and study its optical properties. The presence of gold particles stabilizes longer chains and leads to their alignment. We show that the gold clusters also act as a source of electron doping, thus, changing the intensity of photoluminescence from quadratic depende...
Arrays of memristive devices coupled with photosensors can be used for capturing and processing visual information, thereby realizing the concept of “in-sensor computing”. This is a promising concept associated with the development of compact and low-power machine vision devices, which is crucial important for bionic prostheses of eyes, on-board im...
A model is proposed for the convective flow of a liquid phase of a glycerol colloidal solution and noble metal nanoparticles (Ag, Au, Ag/Au) near a substrate. The diffusion approximation is used to describe the formation of nanocluster systems on the substrate. A model of diffusion-limited aggregation was implemented by applying a cellular automato...
We develop a method for the laser synthesis and deposition of carbon-gold films formed by a net of linear sp-carbon chains and stabilized by gold nanoparticles. The originality of the method is in the simultaneous production of carbon chains and gold nanoparticles due to the laser fragmentation of the amorphous carbon and hydrogen tetrachloroaurate...
A model was proposed for the convective flow of the liquid phase of a colloidal solution of glycerol and noble metal nanoparticles (Ag, Au, Ag/Au) near the substrate. The diffusion approximation is used to describe the formation of nanocluster systems on a substrate. The diffusion-limited aggregation model was implemented by applying a cellular aut...
We synthesize a thin film composed of long carbyne chains terminated by gold clusters and study its optical properties. The presence of gold particles stabilizes longer chains and leads to their alignment. We show that the gold clusters also act as a source of electron doping thus changing the intensity of photoluminescence from quadratic dependenc...
We present a method of synthesis of sp-carbon allotropes or carbynes. Linear chains of carbon atoms are obtained from graphite placed in a joint field of laser plasma and arc discharge. The combined action of laser and arc discharge allows to create conditions for the formation of a variety of carbon allotropes, whose structural composition is gove...
We observed a light-induced enhancement of the tunneling current propagating through an array of parallel carbon chains anchored between gold nanoparticles (NPs). In the presence of laser radiation characterized by a wavelength close to the plasmon resonance of the NPs, the current-voltage characteristics of carbon bundle tunnelling junctions demon...
In the paper we consider femtonanophotonics of the topological controlled low-dimensional dynamic structures in thin films induced by laser radiation on the surface of solids, using the achievements of quantum technologies and nonlinear dynamics for different regimes of electroconductivity.
We completed several laser procedures for obtaining nanost...
Shungite carbon (ShC) nanoparticles in the form of stable aqueous dispersions represent a promising solution for optical and biomedical applications. The dispersion is an interesting phenomenon from the point of view of stabilization of ShC nanoparticles and their structural constituents up to the basic structural unit, namely a graphene fragment....
The purpose of this work is to develop breakthrough technologies and technology transfer in the field of topological photonics, nanoelectronics and new materials with controlled functional and structural characteristics using a unique line of the Vladimir State University (VlSU) equipment (within the framework of the corresponding created structure...
We predict an optical effect associated with systems, which exhibit topologically protected states separated by a finite distance. We develop a tight-binding model to calculate the optical selection rules in linear chains of atoms of different lengths, and show the crucial importance of edge states. For long enough molecules the interband transitio...
We predict an optical effect associated with systems which exhibit topologically protected states separated by a finite distance. We develop a tight-binding model to calculate the optical selection rules in linear chains of atoms of different lengths, and show the crucial importance of edge states. For long enough molecules the interband transition...
We report on the fabrication of fractal dendrites using laser-induced melting of aluminum alloys. We target boron carbide (B4C), which is one of the most effective radiation-absorbing materials characterized by a low coefficient of thermal expansion. Due to the high fragility of B4C crystals, we were able to introduce its nanoparticles into a stabi...
We report on the fabrication of fractal dendrites by laser induced melting of aluminum alloys. We target boron carbide (B4C) that is one of the most effective radiation-absorbing materials which is characterised by a low coefficient of thermal expansion. Due to the high fragility of B4C crystals we were able to introduce its nanoparticles into a st...
The formation of macroscale carbon structures characterised by an sp-sp2-hybridization is realised by self-assembly in colloidal solutions under an effect of laser irradiation and electromagnetic fields. The sponge-like morphology, sculptured with gold nanoparticles (NPs) was revealed by Scanning Electron Microscopy (SEM) imaging. Full structural a...
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 domain...
Models of the formation of roughnesses on the surface of materials and the movement of distributed flows in their presence are considered, which ultimately determines the functional properties of such topological materials of different compositions induced by laser radiation. The paper also presents simulation of crystallization of complex structur...
We applied a controlled method for producing nanostructures on glass substrates. We made detailed measurements to control the resulting micro-and nanostructures using as the principal example of surface modification of glassy carbon compositions under laser irradiation. The properties of the samples after laser irradiation were studied using atomic...
We studied monoatomic linear carbon chains stabilised by gold nanoparticles at- tached to their ends and deposited on a solid substrate. We observe spectral features of straight chains containing from 8 to 24 atoms. Low temperature PL spectra reveal characteristic triplet ne-structures that repeat themselves for carbon chains of dier- ent lengths....
We stabilize monoatomic carbon chains in water by attaching them to gold nanoparticles (NPs) by means of the laser ablation process. Resulting nanoobjects represent pairs of NPs connected by multiple straight carbon chains of several nanometer lengths. If NPs at the opposite ends of a chain differ in size, the structure acquires a dipole moment due...
Functional physical properties of laser-induced nanocluster structures of different topology in the thin films deposited on solid surface and 3D-crystallic structures by femto-nanoexperiments are studied. Physical basis and specific topology nanocluster view are under our consideration with regard to the functional properties variation (electrophys...
The article discusses the experimental results of the fractal metallic island nanofilms elaboration and their modeling in the DLA approximation. There is also presented the simulation of their optical properties using the Monte Carlo method and the scattering intensity, based on the fractal characteristics.
In the article we introduce the experiment of the photostimulation effect in the tunneling conductivity of free-standing thin carbyne-gold films. We observe a sharp increase of the conductivity of hybrid film due to the electromagnetic exciting at the frequencies which are close to the plasmon resonance of gold nanoparticles. The use of carbyne thr...
We stabilize monoatomic carbon chains in water by attaching them to gold nanoparticles (NPs) by means of the laser ablation process. Resulting nanoobjects represent pairs of NPs connected by multiple straight carbon chains of several nanometer lengths. If NPs at the opposite ends of a chain differ in size, the structure acquires a dipole moment due...
The results of experiments on the production of plumbum telluride semiconductor films are given. The models of ballistic and random deposition describing the profile of the films obtained are proposed. The performed simulation qualitatively correctly reflects the relief of the obtained films.
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.
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...
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.
We synthesise and deposit on a substrate monoatomic chains of carbon atoms stabilised by gold nanoparticles. Raman, absorption and photoluminescence (PL) spectra reveal resonant features of straight polyyne chains, that is significantly beyond the theoretical stability limit of 6 atoms for free-standing carbon chains. Polyyne is a direct band gap s...
An experimental method for fabrication of a nanocomposite metamaterial based on a self-assembly of titanium dioxide microtubes with encapsulated gold nanoparticles (NPs) is proposed. The formation of microtubes is induced by laser irradiation in the presence of an external magnetic field. It is shown that the variation of the metal NP concentration...
We studied laser-induced nanocluster structures of different types both in theory and experimentally (in topology and the element noble metal/carbon compositions) taking into account the correlations in nanoparticle ensemble by quantum states. The quantum size effects in both electrophysics and optics are discussed. The problem of high temperature...
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 e...
The problem to induce the Long Linear Carbon Chain (LLCC)/carbyne is very principal in both physics and applications, especially to control the electrophysical properties due to high polarizability. General approach to fabricate the LLCC is based on the concept to compensate the process of instability for linear chain (due to form of globules and b...
Optical Tamm states are defect electromagnetic modes which appear at the discontinuity of the optical crystal. Being trapped at the interface of a dielectric Bragg mirror and a metal they demonstrate a tight localization in the direction perpendicular to the interface. Here we study the trapping of the Tamm states in the interface plane by patterni...
The possibility of controlling the functional properties of nanostructured thin films of different topology and elemental composition deposited on solid substrates by laser radiation is under our study. Quantum-correlated states that emerge in the deposited granular nanocluster semiconductor/metal structures lead to both hopping/tunneling electroco...
We experimentally realize nano-antennas based on hybrid silicon-gold nanoparticles (NPs). The silicon particles covered by clusters of small metal NPs are fabricated from a liquid phase under the effect of the laser irradiation. The complex nanoclusters containing both Si and Au components provide the enhancement of the near-field intensity and the...
Nanocluster structures can be easily modified in necessary direction and by controlled way in femtonanophotonics experiments. The variation of the key topology parameters can result in new type of the quantum correlation states/size effect for charged particles.
In our earlier experiments we studied laser-induced topological nanoclusters structures...
The physical properties of solid structures depending on the boundary conditions in topologically ordered nanocluster systems are discussed. These systems are synthesized using various laser methods in the form of metal/semiconductor nanostructures/nanoclusters and thin films on solid substrates. A particular attention is paid to the possible mecha...
We synthesize macroscopically long linear carbon chains (carbynes) in a colloidal solution, then deposit them on a surface. The method is based on the formation of carbon threads by laser ablation in a colloid accompanied by the stabilization of resulting linear carbon chains by golden nanoparticles. We observe the signatures of the polyyne allotro...
The paper demonstrates that the laser ablation approach can be used for synthesis (with average nanoparticle size control) of silicon nanoparticles supporting strong resonant optical responses in the visible spectral range. Porous and monolithic crystalline silicon targets are considered. The generated colloidal solutions have been used for the for...
Metal–carbyne materials, synthesized by laser irradiation of colloidal systems consisting of carbon and noble metal nanoparticles, are promising objects to realize surface-enhanced Raman scattering. The dependence of the Raman scattering intensity of the material composition has been investigated. The possibility of detecting of the organic dye Rho...
A clear physical model for the quantum states verification in nanocluster structures with jump/tunneling electroconductivity are under study in both theory and experiment. The accent is made on consideration of low-dimensional structures when the structural phase transitions occur and the tendency to high enhancement electroconductivity obtained. T...
Obtaining thin films of today is unthinkable without use of mathematical modeling, numerical methods and complex programs. In this regard, the practical importance of this calculations is that it can be used to investigate the conductivity of nano-sized granular structures that expands the diagnostic capabilities of thin films, opens up new perspec...
Tamm plasmons are confined optical states at the interface of a metal and a dielectric Bragg mirror. Unlike conventional surface plasmons, Tamm plasmons may be directly excited by an external light source in both TE and TM polarizations. Here we consider the one-dimensional propagation of Tamm plasmons under long and narrow metallic stripes deposit...
We show that the laser ablation method can be efficiently employed for the synthesis of silicon nanoparticles (NP), which are characterized by a strong resonant optical response in the visible spectral range. A single layer composed of silicon NPs has been deposited from the colloidal solution generated by laser ablation. The formation of hybrid si...
The paper demonstrates that the laser ablation approach can be used for the synthesis (with average nanoparticle size control) of silicon nanoparticles supporting strong resonant optical responses in the visible spectral range. The addition of gold nanoparticles amplificates the luminescence and increases its diapason. Monolithic crystalline silico...
We produce bimetallic Au:Ag thin films by laser irradiation of the mixed solutions. After several laser scans, granular nanometric films are found to grow with a well-controlled composition, thickness and morphology. By changing laser scanning parameters, the film morphology can be varied from island structures to quasi-periodic arrays. The optical...
The conductivity of thin films composed by clusters of gold and silver nanoparticles has been studies in a wide range of temperatures. The switch from a linear to an exponential thermal dependence of the conductivity manifests the crossover between the tunnel and hopping regimes of the electronic transport at the temperature of 60C. The characteris...
Moving nanosecond laser system is used for laser-assisted thermodiffusion deposition of metallic nanoparticles from water-based colloidal solutions. The results obtained for both gold and silver nanoparticles show that film morphology strongly depends on laser scanning speed and the number of passages. We show, furthermore, the possibility of produ...
A new approach to analyzing the conductivity of metal microcontacts of the fractal type is proposed. It is shown that the resistance of such a microcontact depends strongly on its morphology (total characteristic including the size, shape, and spatial organization, which are determined by atomic force microscopy). A method for calculating the resis...
Continuous wave (CW) radiation from Yb-fiber laser (central wave length is 1064 nm, power 1-200 W) is used to initiate ablation of material Au target in deionized water and synthesize bare (unprotected) Au nanoparticles. We show that the formed nanoparticles present a single low-size-dispersed population with the mean size of the order of 10 nm, wh...
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...
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 has been investigated. The possibility of detecting of the Raman spectrum of organic due...
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 has been investigated. The possibility of detecting of the Raman spectrum of organic due...
We studied in both theory and experiment the nanocluster structures of different types (due to topology and composition) taking into account the correlations in nanoparticle-ensemble by quantum states. The problem of high temperature superconductivity due to topological surface structures with localized states has been under our consideration. Dram...
The optical properties of multilayer bimetallic films composed of silver and gold nanoparticles have been investigated. The dependence of the transmission spectra of the films on their morphology is demonstrated. A finite-difference time-domain (FDTD) simulation has confirmed that there is a dependence of the transmission spectra on the average dis...
The synthesis of nanostructured metal–carbon materials by laser irradiation is an actual branch of laser physics and nanotechnology. Laser sources with different pulse duration allow to change the heating rate with realization of different transition scenarios and synthesis materials with various physical properties. We study the process of the for...
We consider experimentally and theoretically the detection of quantum states in nanocluster semiconductor/metal structures upon the registration of hopping/tunneling electrical conductivity and possible mechanisms of realization of such states. We obtain nanostructured thin films on the substrates using different technologies, including laser ablat...
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...
In this work the results of a bimetallic Au-Ag structure deposition from the colloidal system by nanosecond laser radiation are presented. The formation of the extended arrays of gold and silver nanoparticles with controlled morphology is examined. We report the results of formation bimetallic islands films with various electrical and optical prope...
A method is proposed for the synthesis of linear carbon chains under irradiation of colloidal systems consisting of schungite nanoparticles by an ytterbium fibre laser with a pulse duration of 100 ns and an energy up to 1 mJ. Colloidal systems have been previ¬ously prepared by laser ablation of a schungite target in distilled water using a Nd3+ : Y...
Methods of laser modification allow us to observe macroscopic quantum phenomena in nanostructured (cluster) materials. The laser synthesis of nanoparticles/nanoclusters with different topologies in semiconductor PbTe samples is performed via direct laser modification of thin films under the action of continuous laser radiation with a wavelength of...
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 disp...
The laser synthesis technique for producing nanoparticles/nanoclusters of different topology for semiconductor samples (PbTe) is presented by two laser ablation methods: direct laser modification of thin films and laser evaporation of substance from the target in liquid (ethanol) to produce a colloidal system, and the subsequent laser deposition of...
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...
Synthesis of nanotructured metal-carbon materials by laser irradiation is an actual branch of laser physics and nanotechnology. Laser sources with different pulse duration allow changing the heating rate with realization of different transition scenarios and synthesis materials with various physical properties. We study the process of the formation...
The results from experiments on the laser irradiation of metallic targets of the copper group immersed in liquid are reported. Comparative studies of the formation of colloids during the laser irradiation of targets with varying (from moderate to ultrahigh) radiation intensities are conducted. The dependence of the size of obtained particles on las...
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...
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 T...
We report experimental results on laser formation of carbon nanostructures produced during irradiation of a target placed in water. We have performed comparative experiments on laser heating of carbon targets by millisecond and femtosecond laser pulses. It is shown that under different conditions of laser irradiation
of targets made of schungite, g...
The formation of gold-silver cluster structures on surfaces of glasses has been investigated. The properties of these structures are analyzed in dependence on the weight ratio of metal nanoparticles and the particle concentration in the colloid. It is shown that the optical properties of these structures may change significantly with a change in th...
The nanostructures with different morphology have been obtained by us by methods of both direct laser modification (from cw to fs laser radiation) of the target surface/thin films and laser evaporation of the target substance in liquid to produce the colloid systems, and then – to deposite substance on substrate from colloid, and also – by a single...
