Sergey Aleksandrovich Bedin

Исследованы магнитные свойства и спектральные зависимости оптической плотности никелевых нанотрубок с золотым покрытием, полученных методом шаблонного синтеза. Изменение относительной интенсивности прошедшего через раствор нанотрубок оптического пучка в магнитном поле, перпендикулярном и параллельном ходу распространения луча, показывает возможност...

An Erratum to this paper has been published: https://doi.org/10.1134/S1062873824010039

The authors propose a way of identifying the composition of paints by means of surface enhanced Raman spectroscopy using signal-amplifying substrates with arrays of vertically standing silver nanowires. A model tempera paint based on egg white with inorganic pigments (red lead, massicot, and emerald green) is used to show that with a reduced concen...

Представлен дайджест патента на изобретение РФ, суть которого состоит в способе определения степени локального растрескивания металлического покрытия, нанесенного на поверхность диэлектрического материала. Новый метод основан на регистрации сигнала гигантского комбинационного рассеяния света «зондового» аналитического материала, нанесенного в низко...

Разработаны фундаментальные основы и рассмотрены возможности применения спектроскопии гигантского комбинационного рассеяния света (ГКРС) для анализа некоторых структурных характеристик поверхностей и агломератов наноструктур из плазмонных металлов. Представлен пример реализации неразрушающего дистанционного экспресс-метода ГКРС-диагностики степени...

We proposed a method for identifying the composition of paints used in painting using the method of Surface Enhanced Raman Spectroscopy using signal-amplifying substrates with an array of vertically standing silver nanowires. Using the example of a model tempera paint based on egg white with an inorganic pigment (red lead, massicot, emerald green),...

The properties of titanium foils that have been used for a long time in electron guns of e-beam-pumped excimer lasers have been studied. The tensile strength of these foils did not change when irradiated with e-beam pulses (300 keV) with doses up to 1 GGy. On the surface of Ti foils in contact with a fluorine-containing gas mixture during irradiati...

A method for synthesizing a magnetic fluid with ferromagnetic nanowires based on silicone oil is described, and a magnetorheological effect is demonstrated. The physical characteristics of the resulting ferrophase were studied using optical and scanning electron microscopy, energy-dispersive X-ray spectroscopy, and X-ray phase analysis. The size of...

This study presents a method for fabricating a film-based heating element using a polymer material with an array of intersecting conductive elements embedded within it. Track-etched membranes (TM) with a thickness of 10 μm were used as the template, and their pores were filled with metal, forming a three-dimensional grid. Due to the unique manufact...

A method for obtaining iron-nickel nanowires 5 μm in length and 100 nm in diameter using template synthesis based on track membranes is described. The actual length of the obtained FeNi nanowires was estimated by scanning electron microscopy, and their elemental composition and structure were studied. The possibility of using the synthesized nanowi...

This paper is devoted to the study of the structure and thermomechanical properties of PVDF-based ferroelectric polymer film. Transparent electrically conductive ITO coatings are applied to both sides of such a film. In this case, such material acquires additional functional properties due to piezoelectric and pyroelectric effects, forming, in fact...

The most relevant technique for portable (on-chip) sensors is Surface Enhanced Raman Scattering (SERS). This strategy crashes in the case of large (biorelevant) molecules and nano-objects, whose SERS spectra are irreproducible for “homeopathic” concentrations. We suggested solving this problem by SERS-mapping. We analyzed the distributions of SERS...

Dielectric properties of a linear polymer dielectric polypropylene and a ferroelectric copolymer vinylidene fluoride – tetrafluoroethylene VDF/TFE 94/6 using a graphene-based carbon material as electrodes were measured in wide frequency and temperature range. An additional dispersion region in the frequency dependencies of dielectric properties is...

The investigation of the mechanical properties of polymer track-etched membranes (TMs) has attracted significant attention in connection with the extended region of their possible applications. In the present work, the mechanical stress fields around the pores of an elongated polyethylene terephthalate TM and around the 0.3 mm holes in model polyme...

The identification of high-energy compounds in trace concentrations not only in the laboratory, but also in field conditions is of particular interest. The process should be clear, easy, and well-recognizable. We formed SERS-active substrates by using elongated nickel nanotubes synthesized by electrochemical deposition in the pores of ion-track mem...

When using track membranes for the template synthesis of nanomaterials, it is important to have data on their characteristics (porosity, pore distribution on the surface, etc.). A method for the segmentation of track-membrane images to search for pores on the surface using the UNet++ model is implemented. The result of the program is a binary mask,...

Based on regular porous polymeric membranes, the synthesis of metallic and dielectric spearhead structures with given morphological characteristics was carried out. Copper structures with 1 μm height and dielectric spearhead microstructures made of iodoic acid with 12 μm height and 1 μm diameter of were obtained. The possibility of using such optic...

Based on regular porous polymeric membranes, the synthesis ofmetal and dielectric spearhead structures with given morphologicalcharacteristics was carried out. Copper structures with the ~1 μm height and dielectric spearhead microstructures made from iodicacid with the 12 μm height and 1 μm diameter were obtained. Thepossibility is discussed of usi...

The effect of hyper enhancement of Raman scattering appearing on microcracks of the metal deposition (silver, gold) of uniaxially stretched track polymer membranes (TMs) is investigated. Deformation of membranes with a combination of high surface density and small diameter of their pores leads to the development of many microcracks in the metal coa...

A method for the formation of magneto-optical one-dimensional (1-D) nanostructures by the electrodeposition method into the pores of track-etched membranes is presented in this letter. Two possible techniques are considered: the synthesis of magnetic nanotubes and their subsequent coating with silver, as well as the synthesis of vertical-standing a...

A way of analyzing the spatial distribution of a solution on a substrate with a developed nanostructured surface (a metallized metasurface) is proposed. The technique is based on epi-luminescence microscopy and can be used to calculate the gain of the SERS signal on a surface with a complex highly-developed structure, where standard ways of estimat...

Three methods of obtaining regular porous structures in polyethylene-terephthalate polymer films are considered. A film is irradiated with synchrotron radiation at an X-ray lithography station through a mask based on a tantalum membrane perpendicular to its surface, followed by the chemical etching of destruction zones. To form regular porous struc...

При взаимодействии со светом микросферы формируют фотонную нанострую. Использование этого эффекта позволяет реализовать микроскопию сверхвысокого разрешения. Другим применением фотонной наноструи является усиление сигнала КРС. В работе показаны эффекты фотонной наноструи, применяемой для усиления КР-сигнала в комбинации с ГКР активными подложками п...

The development of actuators with remote control is important for the construction of devices for soft robotics. The present paper describes a responsive hydrogel of nontoxic, biocompatible, and biodegradable polymer carboxymethyl hydroxypropyl guar with dynamic covalent cross-links and embedded cobalt ferrite nanoparticles. The nanoparticles signi...

This paper presents a cost-effective approach for the template-assisted electrodeposition fabrication of substrates for surface-enhanced Raman scattering (SERS) with metal nanowires (NWs) grown in pores of polymer track-etched membranes (TM). This technique allows the synthesis of NWs array with its certain surface density and diameter (from dozen...

Vinylidene fluoride (VDF)/tetrafluoroethylene (TFE) 94/6 copolymer films obtained by low-temperature crystallization from acetone solution and by melt-crystallization under high pressure were studied. As shown in the X-ray diffraction patterns, β- and γ- phases coexist in the sample crystallized from a solution. At melt-crystallization, a number of...

Dielectric response of vinylidene fluoride‐hexafluoropropylene copolymer, crystallized in different polymorph modifications, to a high‐voltage electric field was studied. Polarization switching at high electric fields below coercive was detected. It was found that crystallization of the copolymer predominantly in nonpolar α‐phase is accompanied by...

Nanowires (NWs) of FeNi and FeCo alloys were obtained by matrix synthesis based on galvanic filling of pores in track membranes. The change in the elemental composition of NWs when changing the composition of the electrolyte and when changing the deposition potential was studied. The effect of anomalous co-deposition of Fe is observed in the FeNi N...

This paper presents an investigation of electrodeposition of metal in pores of track etched membranes in presence of magnetic field. Where were obtained as homogeneous and heterogeneous nanowires. There is shown that magnetic field affects both on deposition process and on structure of metal nanowires. Particularly, samples obtained were investigat...

Behavior of metallic nano-coating of the track membrane based on polyethylene terephthalate film under tension was investigated. In the vicinity of cracks in the coating, conical-shaped debondings of the coatings were observed. Debondings have the form of sharp cones, elongated along the tension axis and perpendicular to the cracks. Nanopores initi...

The tensile behavior of a metal nanocoating on a track-etched membrane based on a polyethylene terephthalate film was investigated. Near cylindrical pores in the substrate, conical debondings of the coating were detected for the first time. Nanopores initiate multiple cracking of the coating, and short microcracks mutually inhibit their growth. As...

Nanowires of Ni1−xFex compounds were obtained by electrochemical deposition in pores of flexible polymer track membranes with pore diameters of 30 and 70 nm. The elemental composition and growth conditions, allowing to control the length and aspect ratio of the nanowire, were established. Magnetic and Mössbauer spectroscopy measurements show that t...

Ferroelectric poly(vinylidene fluoride–hexafluoropropylene) films were prepared by low-temperature crystallization from the acetone and ethyl acetate solutions. Crystalline modifications of the obtained films were different (mixture of β- and γ-phases in case of acetone and predominantly α-phase in case of ethyl acetate). The dielectric spectroscop...

A method for forming regular dielectric and metallic microstructures based on polyethylene terephthalate films irradiated with a synchrotron radiation source through a mask with subsequent etching. To study their geometric parameters, scanning electron microscopy was used.

An effect of Rhodamine 6G dye introduced into vinylidenefluoride and tetrafluoroethylene copolymer on a number of its structural and electrical characteristics has been detected. It was shown that at film crystallization, the inserted dopant shifts the equilibrium distribution of isomers to the side of increasing concentrations of chains with the c...

A method for forming regular dielectric and metallic microstructures based on polyethylene terephthalate films irradiated with a synchrotron radiation source through a mask with subsequent etching. To study their geometric parameters, scanning electron microscopy was used.

The optical properties of track-etched membranes, obtained by irradiating a poly(ethylene terephthalate) film on a synchrotron through a mask with regularly spaced holes of 1 μm in diameter and subsequent chemical etching, have been investigated. These objects can be used as a template for fabricating regular plasmon resonance systems and two-dimen...

Hysteresis phenomena were observed under electric fields two orders of magnitude lower than the coercive ones in ferroelectric copolymer vinylidene fluoride–tetrafluoroethylene. From the field dependences of the electrical displacement hysteresis, the volumetric energy density of electric loss was calculated. Its value increases with increasing amp...

Electrical, electromechanical, and structural–optical properties of films of vinylidene fluoride copolymer with tetrafluoroethylene TFE, doped with Rhodamine 6G dye, have been investigated. It is found that the conductivity increases in doped films; at the same time, it “anomalously” decreases with an increase in the field. The hysteresis loop of l...

Magnetic nanowires (NWs) of pure Fe,Co, Ni, alloys FeCo, FeNi and layered Ni/Cu were obtained by galvanic deposition into the pores of track membranes. The process of deposition was investigated and non-linear character was found. The obtained ensembles of NWs were tested by SEM, TEM, X-ray, Magnetometry and Mässbayer spectroscopy. Element concentr...

An effect of electrode materials on the process of oriented film polarization of ferroelectric copolymers of vinylidenefluoride and tetrafuoroethylene has been studied. Electrodes of Al and Au were used, with their work function values being substantially different. Polarization was carried out by high-voltage impulse supply from which remnant pola...

The dielectric properties of nanocrystalline tungsten oxide are studied in the temperature range of 223–293 K and in the frequency range ν = 10–2–10⁶ Hz. Powders of WO3 with particle sizes of 110, 150, and 200 nm are prepared by the heat treatment of ammonium paratungstate at various temperatures. It is established that the frequency dependences of...

Iron nanowires (NWs) were obtained by template synthesis using polymer track membranes in the framework of development of a general method for the synthesis of regular metal nanostructures. The surface topography of NWs was studied by scanning electron microscopy, and the local state of iron atoms was determined by Mössbauer spectrometry.

Iron and nickel nanowires are grown by the matrix synthesis technique in the pores of the track membrane fabricated based on polyethylene terephthalate (PET). Scanning electron microscopy (SEM) and atomic force microscopy (AFM) are used to image the pores on the surface of the specimens and determine the 3d metal nanowires in a polymer bulk. The ma...

The structure of layered Cu/Ni nanowires obtained by template synthesis in 100-nm channels of track membranes has been investigated by transmission and scanning electron microscopy. The phase composition and main structural features of individual nanowires are determined. It is shown that nanowires consist of alternating Ni (Fm3m) and Cu (Fm3m) lay...

High-temperature processes of space charge relaxation in films of poly(vinylidene fluoride-trifluoroethylene) (70–30) have been investigated. The films were prepared by the crystallization from a solution in tetrahydrofuran at a room temperature. X-ray data analysis showed that initial films crystallize in metastable state: a paraelectric phase is...

The resistance of Fe0.56Ni0.44 alloy nanowires (fabricated by template synthesis using polymer track membranes) 60 and 100 nm in diameter to radiation with powerful pulsed 85% C⁺ + 15% H⁺ ions (E = 20 keV, j = 100 A/cm², τ = 90 ns) has been investigated. The conclusion that nanosized regions of explosive energy release, so-called thermal spikes, wh...

The dielectric properties of nanocrystalline tungsten oxide are studied in the temperature range of 223–293 K and in the frequency range ν = 10^–2–10^6 Hz. Powders of WO_3 with particle sizes of 110, 150, and 200 nm are prepared by the heat treatment of ammonium paratungstate at various temperatures. It is established that the frequency dependences...

Iron nanowires (NWs) were obtained by template synthesis using polymer track membranes in the framework of development of a general method for the synthesis of regular metal nanostructures. The surface topography of NWs was studied by scanning electron microscopy, and the local state of iron atoms was determined by Mössbauer spectrometry.

—Samples of arrays of nanowires are produced from iron, iron–cobalt and iron–nickel alloys via matrix synthesis based on polymer track membranes with pore diameters ranging from 30 to 300 nm. The influence of stress and pore diameter on the galvanic process and structure of nanowires is studied. The arrays of nanowires are examined by microscopy an...

Исследованы электрофизические, электромеханические и структурно-оптические свойства пленок сополимера винилиденфторида с тетрафторэтиленом, допированных красителем Родамин 6Ж. Обнаружено, что в допированных пленках повышается проводимость, которая “аномально” снижается с ростом поля. Петля гистерезиса локального пьезоэлектрического отклика имеет ас...