rus
Nanotechnology
A.V.Blinov, Z.A.Rekhman, A.A.Gvozdenko, A.B.Golik, I.M.Shevchenko, M.A.Yasnaya, P.G.Sinyugina
SYNTHESIS AND STABILIZATION OF NANO-SIZED CALCIUM CARBONATE WITH METHYL CELLULOSE DOI: https://doi.org/10.22184/1993-8578.2023.16.7-8.408.415
This work presents a method for the synthesis of calcium carbonate nanoparticles stabilized by methylcellulose. Calcium acetate was used as a precursor, and ammonium carbonate acted as a precipitant. The microstructure of the surface of the obtained samples was studied by scanning electron microscopy, and as a result it was found that the sample was represented by hollow spheres with a diameter of about 2 μm, the particle size of which varied from 40 to 250 nm. To determine the optimal type of interaction between particles and the stabilizer, computer quantum chemical modeling was carried out. It was found that the process of stabilization of nano-sized calcium carbonate and methylcellulose is energetically favorable. Also, to confirm the modeling results, the samples were examined by Fourier transform IR spectroscopy. Analysis of the results revealed that the interaction of CaCO3 nanoparticles occurs with the charged OH- group.
SYNTHESIS AND STABILIZATION OF NANO-SIZED CALCIUM CARBONATE WITH METHYL CELLULOSE DOI: https://doi.org/10.22184/1993-8578.2023.16.7-8.408.415
This work presents a method for the synthesis of calcium carbonate nanoparticles stabilized by methylcellulose. Calcium acetate was used as a precursor, and ammonium carbonate acted as a precipitant. The microstructure of the surface of the obtained samples was studied by scanning electron microscopy, and as a result it was found that the sample was represented by hollow spheres with a diameter of about 2 μm, the particle size of which varied from 40 to 250 nm. To determine the optimal type of interaction between particles and the stabilizer, computer quantum chemical modeling was carried out. It was found that the process of stabilization of nano-sized calcium carbonate and methylcellulose is energetically favorable. Also, to confirm the modeling results, the samples were examined by Fourier transform IR spectroscopy. Analysis of the results revealed that the interaction of CaCO3 nanoparticles occurs with the charged OH- group.
Tags: calcium carbonate nanoparticles scanning electron microscopy карбонат кальция наночастицы сканирующая электронная микроскопия
L.I.Kravets, V.A.Altynov, R.V.Gainutdinov, E.V.Shesterikov, I.V.Kulinich, S.I.Tverdokhlebov
FORMATION OF COMPOSITE MEMBRANES WITH ASYMMETRY OF CONDUCTIVITY BY PLASMA CHEMICAL DEPOSITION OF SILICON DIOXIDE NANOPARTICLES DOI: https://doi.org/10.22184/1993-8578.2023.16.7-8.416.425
The surface and electrochemical properties of a poly(ethylene terephthalate) track-etched membrane, one side of which was coated with nanoscale silicon dioxide coating by plasma chemical deposition from the gas phase of the silane and nitrous oxide mixture, have been investigated. It is shown that the deposition of the silicon dioxide layer on the membrane surface leads to the creation of composite membranes that exhibit in electrolyte solutions conductance asymmetry.
FORMATION OF COMPOSITE MEMBRANES WITH ASYMMETRY OF CONDUCTIVITY BY PLASMA CHEMICAL DEPOSITION OF SILICON DIOXIDE NANOPARTICLES DOI: https://doi.org/10.22184/1993-8578.2023.16.7-8.416.425
The surface and electrochemical properties of a poly(ethylene terephthalate) track-etched membrane, one side of which was coated with nanoscale silicon dioxide coating by plasma chemical deposition from the gas phase of the silane and nitrous oxide mixture, have been investigated. It is shown that the deposition of the silicon dioxide layer on the membrane surface leads to the creation of composite membranes that exhibit in electrolyte solutions conductance asymmetry.
Tags: composite membranes conductance asymmetry modification plasma chemical deposition from the gas phase silicon dioxide асимметрия проводимости poly (ethylene terephthalate) track-etch диоксид кремния композиционные мембраны модифицирование плазмохимическое осаждение из газовой фазы полиэтилентерефталатная трековая мембрана
A.V.Blinov, I.M.Shevchenko, A.A.Gvozdenko, Z.A.Rekhman, A.B.Golik, A.A.Blinova, M.V.Vakulenko
STUDY OF THE INFLUENCE OF PRECURSOR TYPE ON THE DISPERSION CHARACTERISTICS OF SELENIUM NANOPARTICLES DOI: https://doi.org/10.22184/1993-8578.2023.16.7-8.426.433
In the framework of this work, the influence of the type of precursor and stabilizer on the dispersion characteristics of selenium nanoparticles, in particular, the average hydrodynamic radius and ζ potential of the particles, was studied. Nanoparticles were obtained by chemical reduction in an aqueous medium. Lithium, sodium, and potassium selenites were used as a precursor, and ascorbic acid was used as a reducing agent, and 4 surfactants were used as a stabilizer: anionic – sodium laureth sulfate, cationic – CTAC, nonionic – Tween-80, amphoteric – cocamidopropyl betaine. For samples stabilized with sodium laureth sulfate, a negative value of this indicator is observed, while using other stabilizers, a positive value of the ζ-potential is observed. The optimal surfactant is cocamidopropyl betaine, which is due to the fact that when changing the concentrations of substances, it showed the smallest changes in the average hydrodynamic radius and ζ-potential of selenium nanoparticles. It is shown that the type and concentration of the precursor have little effect on the average hydrodynamic radius of selenium nanoparticles. It has been established that an increase in the concentration of the precursor leads to a decrease in modulus ζ-potential of particles. It is important to note that the type of precursor does not significantly affect the ζ potential of selenium nanoparticles.
STUDY OF THE INFLUENCE OF PRECURSOR TYPE ON THE DISPERSION CHARACTERISTICS OF SELENIUM NANOPARTICLES DOI: https://doi.org/10.22184/1993-8578.2023.16.7-8.426.433
In the framework of this work, the influence of the type of precursor and stabilizer on the dispersion characteristics of selenium nanoparticles, in particular, the average hydrodynamic radius and ζ potential of the particles, was studied. Nanoparticles were obtained by chemical reduction in an aqueous medium. Lithium, sodium, and potassium selenites were used as a precursor, and ascorbic acid was used as a reducing agent, and 4 surfactants were used as a stabilizer: anionic – sodium laureth sulfate, cationic – CTAC, nonionic – Tween-80, amphoteric – cocamidopropyl betaine. For samples stabilized with sodium laureth sulfate, a negative value of this indicator is observed, while using other stabilizers, a positive value of the ζ-potential is observed. The optimal surfactant is cocamidopropyl betaine, which is due to the fact that when changing the concentrations of substances, it showed the smallest changes in the average hydrodynamic radius and ζ-potential of selenium nanoparticles. It is shown that the type and concentration of the precursor have little effect on the average hydrodynamic radius of selenium nanoparticles. It has been established that an increase in the concentration of the precursor leads to a decrease in modulus ζ-potential of particles. It is important to note that the type of precursor does not significantly affect the ζ potential of selenium nanoparticles.
Tags: dispersion characteristics particle potential precursor selenium дисперсные характеристики nanoparticles наночастицы потенциал частиц прекурсор селен
Equipment for nanoindustry
I.V.Krasnogorov, A.A.Rusakov, V.N.Reshetov
USE OF A FORCE TRANSFORMER TO IMPROVE THE METROLOGICAL CHARACTERISTICS OF NANOHARDNESS TESTER DOI: https://doi.org/10.22184/1993-8578.2023.16.7-8.434.442
The equipment for instrumental nanoindentation traditionally represents a product containing a displacement sensor and a force-generating element operating in the nanoscale range of displacements and forces. At the same time, all working elements of the nanoindenter have a system of elastic attachment to a rigid body. However, part of the force generated by the actuator is spent on the deformation of the suspension system of the movable elements. This paper considers the design of a nanohardometer, in which a force cell is introduced that allows measuring the real value of the indentation force without the need to take into account the deformation losses of the elastic elements of the nanohardometer. Such modification of the product, according to the authors, allows to significantly increase the accuracy of measuring the mechanical properties of soft materials and thin coatings.
USE OF A FORCE TRANSFORMER TO IMPROVE THE METROLOGICAL CHARACTERISTICS OF NANOHARDNESS TESTER DOI: https://doi.org/10.22184/1993-8578.2023.16.7-8.434.442
The equipment for instrumental nanoindentation traditionally represents a product containing a displacement sensor and a force-generating element operating in the nanoscale range of displacements and forces. At the same time, all working elements of the nanoindenter have a system of elastic attachment to a rigid body. However, part of the force generated by the actuator is spent on the deformation of the suspension system of the movable elements. This paper considers the design of a nanohardometer, in which a force cell is introduced that allows measuring the real value of the indentation force without the need to take into account the deformation losses of the elastic elements of the nanohardometer. Such modification of the product, according to the authors, allows to significantly increase the accuracy of measuring the mechanical properties of soft materials and thin coatings.
Tags: actuator capacitive sensor force transformer hardness instrumental indentation loading system modulus of elasticity nanoindenter power cell актюатор емкостной датчик инструментальное индентирование модуль упругости наноиндентор силовая ячейка система нагружения твердость трансформатор силы
A.I.Akhmetova, T.O.Sovetnikov, N.E.Maksimova, A.D.Terentiev, А.А.Uzhegov, I.V.Yaminsky
THE HEART OF THE CAPILLARY MICROSCOPE DOI: https://doi.org/10.22184/1993-8578.2023.16.7-8.444.448
Scanning capillary or ion-conducting microscopy is a unique tool that allows one to obtain the 3D morphology of biological objects in a natural environment in a non-contact manner. At the same time, sample preparation is simple – there is no need to introduce fluorescent labels or fix the sample. The most important advantage of the method is that it is possible to monitor the dynamic processes of living cells and tissues. The device of a capillary microscope allows not only delicate visualization of soft biological objects, but also obtaining data on the biomechanical properties of the sample. This paper will discuss the intricacies of a capillary microscope.
THE HEART OF THE CAPILLARY MICROSCOPE DOI: https://doi.org/10.22184/1993-8578.2023.16.7-8.444.448
Scanning capillary or ion-conducting microscopy is a unique tool that allows one to obtain the 3D morphology of biological objects in a natural environment in a non-contact manner. At the same time, sample preparation is simple – there is no need to introduce fluorescent labels or fix the sample. The most important advantage of the method is that it is possible to monitor the dynamic processes of living cells and tissues. The device of a capillary microscope allows not only delicate visualization of soft biological objects, but also obtaining data on the biomechanical properties of the sample. This paper will discuss the intricacies of a capillary microscope.
Tags: biomechanics instrumentation living systems биомеханика живые системы приборостроение scanning capillary microscopy сканирующая капиллярная микроскопия
A.I.Akhmetova, I.V.Yaminsky, T.O.Sovetnikov
FEMTOSCAN ONLINE: 3D VISUALIZATION AND PROCESSING OF BIONANOSCOPY DATA DOI: https://doi.org/10.22184/1993-8578.2023.16.7-8.450.455
Atomic force microscopy is a unique tool for obtaining the 3D morphology of biological objects and measuring their properties. To apply the method and interpret the obtained data, an important role is played by software that allows you to correctly process the resulting images, remove scanning artifacts and collect valuable information about objects in the image [1, 2]. FemtoScan Online software implements several functions that greatly facilitate image processing and data collection about objects of interest.
FEMTOSCAN ONLINE: 3D VISUALIZATION AND PROCESSING OF BIONANOSCOPY DATA DOI: https://doi.org/10.22184/1993-8578.2023.16.7-8.450.455
Atomic force microscopy is a unique tool for obtaining the 3D morphology of biological objects and measuring their properties. To apply the method and interpret the obtained data, an important role is played by software that allows you to correctly process the resulting images, remove scanning artifacts and collect valuable information about objects in the image [1, 2]. FemtoScan Online software implements several functions that greatly facilitate image processing and data collection about objects of interest.
Tags: atomic force microscopy bionanoscopy data processing scanning probe microscopy substrate alignment атомно-силовая микроскопия бионаноскопия выравнивание подложки обработка данных сканирующая зондовая микроскопия
D.M.Mohovikov, A.A.Guliaeva, I.V.Kulinich, A.A.Talovskaya, A.S.Myrzakhmetov
THE INTEGRAL-OPTICAL POLARIZATION CONVERTER BASED ON SiN DOI: https://doi.org/10.22184/1993-8578.2023.16.7-8.456.461
This paper presents the results of the study of the influence of geometrical design parameters of an integrated-optical (IO) polarization converter, realized based on a comb waveguide structure on silicon nitride on insulator (SNOI), on the polarization rotation efficiency and output optical power of the device. As a result, a mathematical model of an IO polarization converter with polarization rotation efficiency >96 % and output power >98 % was developed. The design of the polarization converter IO with a mirror-reflected polarization rotation section was also proposed, which allows reducing the influence of technological error of the device geometry reproducibility to ±215 nm.
THE INTEGRAL-OPTICAL POLARIZATION CONVERTER BASED ON SiN DOI: https://doi.org/10.22184/1993-8578.2023.16.7-8.456.461
This paper presents the results of the study of the influence of geometrical design parameters of an integrated-optical (IO) polarization converter, realized based on a comb waveguide structure on silicon nitride on insulator (SNOI), on the polarization rotation efficiency and output optical power of the device. As a result, a mathematical model of an IO polarization converter with polarization rotation efficiency >96 % and output power >98 % was developed. The design of the polarization converter IO with a mirror-reflected polarization rotation section was also proposed, which allows reducing the influence of technological error of the device geometry reproducibility to ±215 nm.
Tags: io polarization converter rib optical waveguide silicon nitride гребенчатый оптический волновод ио конвертор поляризации нитрид кремния
V.V.Anashin, G.A.Gusev, A.A.Zhukov, A.A.Krasnov, V.S.Kuzminykh, P.A.Piminov, A.M.Semenov
DESCRIPTION OF THE 4+ GENERATION SYNCHROTRON RADIATION SOURCE SRF “SKIF” VACUUM SYSTEM DOI: 10.22184/1993-8578.2023.16.7-8.462.475
The paper considers the key decisions taken as a basis in the vacuum system design of the future synchrotron radiation source SRF "SKIF" (Koltsovo, Novosibirsk region, Russia). The focus is on the trade-off of using combined lumped pumps along with distributed pumping based on non-evaporable getters (NEG). An estimate of the time required for training the vacuum beam pipe of the SKIF storage ring is given. Designs of the main elements for the vacuum system are considered.
DESCRIPTION OF THE 4+ GENERATION SYNCHROTRON RADIATION SOURCE SRF “SKIF” VACUUM SYSTEM DOI: 10.22184/1993-8578.2023.16.7-8.462.475
The paper considers the key decisions taken as a basis in the vacuum system design of the future synchrotron radiation source SRF "SKIF" (Koltsovo, Novosibirsk region, Russia). The focus is on the trade-off of using combined lumped pumps along with distributed pumping based on non-evaporable getters (NEG). An estimate of the time required for training the vacuum beam pipe of the SKIF storage ring is given. Designs of the main elements for the vacuum system are considered.
Tags: non-evaporable getter storage ring synchrotron radiation source ultra-high vacuum источник си накопитель нераспыляемый геттер сверхвысокий вакуум
D.M.Ivankov, A.S.Lomakin, S.P.Bychkov, A.A.Kopylov
TEMPERATURE OPERATING MODES OF PROPORTIONAL GAS VALVES DOI: https://doi.org/10.22184/1993-8578.2023.16.7-8.476.480
This paper describes the results of experiments to study the effects of the temperature of a proportional gas valve on its main technical characteristics – the output gas flow and the width of the hysteresis loop. A comparative analysis of the results of measurements of the output gas flow rate for the Russian valve being developed and the most popular models of foreign valves – ASCO 202 and Norgren IMI FAS was carried out.
TEMPERATURE OPERATING MODES OF PROPORTIONAL GAS VALVES DOI: https://doi.org/10.22184/1993-8578.2023.16.7-8.476.480
This paper describes the results of experiments to study the effects of the temperature of a proportional gas valve on its main technical characteristics – the output gas flow and the width of the hysteresis loop. A comparative analysis of the results of measurements of the output gas flow rate for the Russian valve being developed and the most popular models of foreign valves – ASCO 202 and Norgren IMI FAS was carried out.
Tags: output gas flow temperature characteristics пропорциональный газовый клапан расход газа температурные характеристики proportional gas valve
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