rus
Nanotechnology
E.I.Diskaeva, O.V.Vecher, I.A.Bazikov, E.N.Diskaeva, K.S.Elbekyan, E.S.Lopatina
EVALUATION OF THE TEMPERATURE INFLUENCE EFFECT ON STABILITY AND PARTICLE SIZE OF NIOSOMAL DISPERSIONS BASED ON PEG-12 DIMETHICONE DOI: https://doi.org/10.22184/1993-8578.2025.18.1.8.15
In this paper, the dynamics of changes in the ζ potential and particle sizes of niosomal dispersions of various concentrations under temperature variation is studied by the method of dynamic light scattering. The average diameter changes of the niosomes and the polydispersity index were revealed. The most significant influence of temperature on the considered parameters was observed in the interval 303–313 K. The experimental data indicated an increase in the zeta potential with increasing temperature. Based on the analysis performed, possibility of increasing the niosomal dispersions stability by means of temperature influence was confirmed.
EVALUATION OF THE TEMPERATURE INFLUENCE EFFECT ON STABILITY AND PARTICLE SIZE OF NIOSOMAL DISPERSIONS BASED ON PEG-12 DIMETHICONE DOI: https://doi.org/10.22184/1993-8578.2025.18.1.8.15
In this paper, the dynamics of changes in the ζ potential and particle sizes of niosomal dispersions of various concentrations under temperature variation is studied by the method of dynamic light scattering. The average diameter changes of the niosomes and the polydispersity index were revealed. The most significant influence of temperature on the considered parameters was observed in the interval 303–313 K. The experimental data indicated an increase in the zeta potential with increasing temperature. Based on the analysis performed, possibility of increasing the niosomal dispersions stability by means of temperature influence was confirmed.
Tags: organosilicon niosomes polydispersity index stability zeta potential дзета-потенциал индекс полидисперсности кремнийорганические ниосомы стабильность
E.V.Panfilova, K.V.Mozer, A.A.Maltsev
TECHNOLOGY FOR PRODUCING SILK FIBROIN AND STRUCTURES BASED ON IT FOR WEARABLE ELECTRONICS PRODUCTS DOI: https://doi.org/10.22184/1993-8578.2025.18.1.16.29
Silk fibroin biopolymer is one of the promising materials for organic electronics. It is characterized by optical transparency, thermal stability sufficient for proteins, biocompatibility and high tensile strength. Silk fibroin-based structures can be used to manufacture sensor elements of wearable electronics. Their properties are determined by the conformation of the protein structure, which depends on the methods and modes of formation of regenerated fibroin from its native form. In this project, a process for the formation of silk fibroin solution, films and photonic crystal structures based on them was developed.
TECHNOLOGY FOR PRODUCING SILK FIBROIN AND STRUCTURES BASED ON IT FOR WEARABLE ELECTRONICS PRODUCTS DOI: https://doi.org/10.22184/1993-8578.2025.18.1.16.29
Silk fibroin biopolymer is one of the promising materials for organic electronics. It is characterized by optical transparency, thermal stability sufficient for proteins, biocompatibility and high tensile strength. Silk fibroin-based structures can be used to manufacture sensor elements of wearable electronics. Their properties are determined by the conformation of the protein structure, which depends on the methods and modes of formation of regenerated fibroin from its native form. In this project, a process for the formation of silk fibroin solution, films and photonic crystal structures based on them was developed.
Tags: biopolymers fibroin photonic crystal structures protein structures silk белковые структуры биополимеры фиброин фотонно-кристаллические структуры шелк
E.V.Gladkikh, G.Kh.Sultanova, A.A.Rusakov, A.S.Useinov, V.V.Molokanov, A.V.Krutilin, N.A.Palii
MECHANICAL PROPERTIES STUDY OF AMORPHOUS Co-ALLOY 84KHSR VARIABLE DIAMETER WIRE BY INSTRUMENTAL INDENTATION METHOD DOI: https://doi.org/10.22184/1993-8578.2025.18.1.30.38
The study of spatial distribution of mechanical properties in a "thick" amorphous wire of Co-alloy 84KHSR has been carried out. A cone sample of amorphous wire of variable diameter (70–300 μm) was obtained by the Ulitovsky-Taylor method by varying the drawing speed during the wire production process. After removing the glass sheath and checking for the conformity of the wire structure to the amorphous state, the mechanical properties of the cone wire samples with diameters of 100 and 270 μm were studied by the instrumental indentation method. It was found that amorphous wire in the range of diameters 70–300 μm retains stable values of hardness and modulus of elasticity in cross and longitudinal sections. Mechanical properties of wires of the studied diameters also practically do not change when moving from the center of the samples to the edge. The obtained data indicate high isotropy of the amorphous structure of the wire of variable diameter. The noted higher values of hardness and modulus of elasticity in the 270 µm diameter sample (Н = 9,8 GPa, Е = 212 GPa) compared to the 100 µm diameter sample (Н = 8,6 GPa, Е = 163 GPa) may be due to a more intensive formation of the cluster structure due to a decrease in the effective cooling rate of the "thicker" wire. It was noted that such wires may find application in the manufacture of new types of medical instruments.
MECHANICAL PROPERTIES STUDY OF AMORPHOUS Co-ALLOY 84KHSR VARIABLE DIAMETER WIRE BY INSTRUMENTAL INDENTATION METHOD DOI: https://doi.org/10.22184/1993-8578.2025.18.1.30.38
The study of spatial distribution of mechanical properties in a "thick" amorphous wire of Co-alloy 84KHSR has been carried out. A cone sample of amorphous wire of variable diameter (70–300 μm) was obtained by the Ulitovsky-Taylor method by varying the drawing speed during the wire production process. After removing the glass sheath and checking for the conformity of the wire structure to the amorphous state, the mechanical properties of the cone wire samples with diameters of 100 and 270 μm were studied by the instrumental indentation method. It was found that amorphous wire in the range of diameters 70–300 μm retains stable values of hardness and modulus of elasticity in cross and longitudinal sections. Mechanical properties of wires of the studied diameters also practically do not change when moving from the center of the samples to the edge. The obtained data indicate high isotropy of the amorphous structure of the wire of variable diameter. The noted higher values of hardness and modulus of elasticity in the 270 µm diameter sample (Н = 9,8 GPa, Е = 212 GPa) compared to the 100 µm diameter sample (Н = 8,6 GPa, Е = 163 GPa) may be due to a more intensive formation of the cluster structure due to a decrease in the effective cooling rate of the "thicker" wire. It was noted that such wires may find application in the manufacture of new types of medical instruments.
Tags: elastic modulus hardness instrumented indentation microwires "thick" amorphous wire "толстый" аморфный провод инструментальное индентирование модуль упругости твердость
A.I.Akhmetova, T.O.Sovetnikov, A.D.Terentiev, I.V.Yaminsky
SCANNING PROBE MICROSCOPY OF FIBROSARCOMA DOI: https://doi.org/10.22184/1993-8578.2025.18.1.40.46
Scanning capillary microscopy (SCM) has become a universal method for studying interactions in living cells and tissues. SCM finds successful application in biology and materials science in biophysical and electrochemical measurements. Initially, this type of microscopy was used mainly to record 3D morphology of cells in the natural environment, but soon the method began to develop due to the use of modified and multichannel capillaries, which made it possible to record active oxygen species near and inside the cell surface, evaluate deformation and other mechanical properties of the objects under study. Modern modifications of the SCM setup have made this method an important tool in bioanalytical, biophysical and materials science measurements. This paper presents a study of fibrosarcoma cells using the FemtoScan X Aion capillary microscope, developed on the basis of original electronics, mechanics and software systems.
SCANNING PROBE MICROSCOPY OF FIBROSARCOMA DOI: https://doi.org/10.22184/1993-8578.2025.18.1.40.46
Scanning capillary microscopy (SCM) has become a universal method for studying interactions in living cells and tissues. SCM finds successful application in biology and materials science in biophysical and electrochemical measurements. Initially, this type of microscopy was used mainly to record 3D morphology of cells in the natural environment, but soon the method began to develop due to the use of modified and multichannel capillaries, which made it possible to record active oxygen species near and inside the cell surface, evaluate deformation and other mechanical properties of the objects under study. Modern modifications of the SCM setup have made this method an important tool in bioanalytical, biophysical and materials science measurements. This paper presents a study of fibrosarcoma cells using the FemtoScan X Aion capillary microscope, developed on the basis of original electronics, mechanics and software systems.
Tags: biomechanics fibrosarcoma living systems scanning capillary microscopy биомеханика живые системы сканирующая капиллярная микроскопия фибросаркома
F.A.Uskov, I.V.Veryuzskii
MORPHOLOGICAL SURFACE ANALYSIS OF SPIN GAPLESS CoFeMnSi SEMICONDUCTOR THIN FILMS GROWN BY PULSED LASER DEPOSITION DOI: https://doi.org/10.22184/1993-8578.2025.18.1.48.58
CoFeMnSi spin gapless semiconductor thin films were grown on a (100) oriented MgO substrate by pulsed laser deposition. In this work, we explored the dependence of CoFeMnSi thin film’s surface morphology on different parameters of growth process. It was shown that an island-like CoFeMnSi thin film with an average grain diameter of D50% = 16.48 nm and roughness parameters Ra = 1.29 nm, Rz = 13.06 nm grows on a (100) oriented MgO substrate if a laser pulse frequency is 1–2 Hz and a pulse energy is 150 mJ. Reducing the frequency of laser pulses to 0.5 Hz with the same pulse energy led to a change in the film growth mechanism to a mixed growth. The film initially grows in the layer-by-layer mode and then 3D islands gradually form. Roughness parameters of the films deposited in this mode decrease to Ra = 0.61 nm and Rz = 11.51 nm. It became possible to implement layer-by-layer film deposition mode by introducing time pauses of 1–2 minutes between the depositions of each CoFeMnSi atomic layer. We found out that the layer-by-layer grown films had solid structure, defects and irregularities of their surface microrelief were smoothed out. The roughness parameters of the samples grown in the layer-by-layer mode decreased to Ra = 0.31 nm and Rz = 4.60 nm. The production of CoFeMnSi thin films with high quality of surface opens up opportunities for fabrication of CoFeMnSi-based heterostructures. With the selected technological parameters of growth process we fabricated MgO/CoFeMnSi/Co thin film with average surface roughness of Ra = 0.17 nm using selected above technological parameters of growth process. The results of this work can be used in fabrication of multilayer structures based on CoFeMnSi and their application in spintronic devices.
MORPHOLOGICAL SURFACE ANALYSIS OF SPIN GAPLESS CoFeMnSi SEMICONDUCTOR THIN FILMS GROWN BY PULSED LASER DEPOSITION DOI: https://doi.org/10.22184/1993-8578.2025.18.1.48.58
CoFeMnSi spin gapless semiconductor thin films were grown on a (100) oriented MgO substrate by pulsed laser deposition. In this work, we explored the dependence of CoFeMnSi thin film’s surface morphology on different parameters of growth process. It was shown that an island-like CoFeMnSi thin film with an average grain diameter of D50% = 16.48 nm and roughness parameters Ra = 1.29 nm, Rz = 13.06 nm grows on a (100) oriented MgO substrate if a laser pulse frequency is 1–2 Hz and a pulse energy is 150 mJ. Reducing the frequency of laser pulses to 0.5 Hz with the same pulse energy led to a change in the film growth mechanism to a mixed growth. The film initially grows in the layer-by-layer mode and then 3D islands gradually form. Roughness parameters of the films deposited in this mode decrease to Ra = 0.61 nm and Rz = 11.51 nm. It became possible to implement layer-by-layer film deposition mode by introducing time pauses of 1–2 minutes between the depositions of each CoFeMnSi atomic layer. We found out that the layer-by-layer grown films had solid structure, defects and irregularities of their surface microrelief were smoothed out. The roughness parameters of the samples grown in the layer-by-layer mode decreased to Ra = 0.31 nm and Rz = 4.60 nm. The production of CoFeMnSi thin films with high quality of surface opens up opportunities for fabrication of CoFeMnSi-based heterostructures. With the selected technological parameters of growth process we fabricated MgO/CoFeMnSi/Co thin film with average surface roughness of Ra = 0.17 nm using selected above technological parameters of growth process. The results of this work can be used in fabrication of multilayer structures based on CoFeMnSi and their application in spintronic devices.
Tags: cofemnsi alloy gapless semiconductor laser deposition spintronics surface morphology thin films бесщелевой полупроводник лазерное осаждение морфология поверхности спинтроника сплав cofemnsi тонкие пленки
Nanomaterials
A.V.Botkin, E.P.Volkova, G.D.Khudododova, O.B.Kulyasova, R.K.Islamgaliev, R.Z.Valiev
RESEARCH AND DEVELOPMENT OF MAGNESIUM ALLOY Mg-1%Zn-0.06%Ca FOR APPLICATION IN MEDICINE DOI: https://doi.org/10.22184/1993-8578.2025.18.1.70.79
Biodegradable and biocompatible magnesium alloy materials show a promising future in medical applications and are currently the subject of active research. This paper presents the results of using combined thermomechanical processing by means of equal-channel angular pressing (ECAP) and subsequent extrusion, to produce the long-sized rods from magnesium alloy Mg-1%Zn-0.06%Ca with an ultrafine-grained structure and enhanced mechanical properties. The thermomechanical conditions have been determined through the use of computer modeling, with specific attention paid to intervals of strain rates, the degree of deformation, and the stress-strain state during the ECAP and extrusion processes. An experimental deformation was conducted, and the structure of the rods obtained through combined processing was investigated. The results demonstrate that the combined processing of the initial homogenized alloy, comprising ECAP and subsequent extrusion, enabled the formation of UFG structure with a grain size of approximately 1 µm and the creation of nano-sized particles, which led to a significant increase in the mechanical properties of the alloy in the rod-shaped samples intended for the manufacture of promising implants in maxillofacial surgery.
RESEARCH AND DEVELOPMENT OF MAGNESIUM ALLOY Mg-1%Zn-0.06%Ca FOR APPLICATION IN MEDICINE DOI: https://doi.org/10.22184/1993-8578.2025.18.1.70.79
Biodegradable and biocompatible magnesium alloy materials show a promising future in medical applications and are currently the subject of active research. This paper presents the results of using combined thermomechanical processing by means of equal-channel angular pressing (ECAP) and subsequent extrusion, to produce the long-sized rods from magnesium alloy Mg-1%Zn-0.06%Ca with an ultrafine-grained structure and enhanced mechanical properties. The thermomechanical conditions have been determined through the use of computer modeling, with specific attention paid to intervals of strain rates, the degree of deformation, and the stress-strain state during the ECAP and extrusion processes. An experimental deformation was conducted, and the structure of the rods obtained through combined processing was investigated. The results demonstrate that the combined processing of the initial homogenized alloy, comprising ECAP and subsequent extrusion, enabled the formation of UFG structure with a grain size of approximately 1 µm and the creation of nano-sized particles, which led to a significant increase in the mechanical properties of the alloy in the rod-shaped samples intended for the manufacture of promising implants in maxillofacial surgery.
Tags: computer finite element modeling ductility equal-channel angular pressing extrusion magnesium alloy microhardness ultimate tensile strength ultrafine-grained structure компьютерное конечно-элементное моделирование магниевый сплав микротвердость пластичность предел прочности равноканальное угловое прессование ультрамелкозернистая структура экструзия
Equipment for nanoindustry
D.V.Vasilyev, A.N.Saurov, V.V.Amelichev
HIGH-SENSITIVE MAGNETIC FIELD TRANSDUCER BASED ON SPIN-TUNNEL MAGNETORESISTIVE NANOSTRUCTURES WITH SYNTHETIC ANTIFERROMAGNET DOI: https://doi.org/10.22184/1993-8578.2025.18.1.60.69
The results of a study of mock-ups of magnetic field transducers (MFT) based on spin-tunnel magnetoresistive nanostructures (STMR) with a synthetic antiferromagnet (SAF) are presented. The absolute sensitivity to the magnetic field of the studied MFT-SAF mock-ups was 217 mV/Oe in the magnetic field range ±5 Oe (±0.5 mT) at a supply voltage of 5 V.
HIGH-SENSITIVE MAGNETIC FIELD TRANSDUCER BASED ON SPIN-TUNNEL MAGNETORESISTIVE NANOSTRUCTURES WITH SYNTHETIC ANTIFERROMAGNET DOI: https://doi.org/10.22184/1993-8578.2025.18.1.60.69
The results of a study of mock-ups of magnetic field transducers (MFT) based on spin-tunnel magnetoresistive nanostructures (STMR) with a synthetic antiferromagnet (SAF) are presented. The absolute sensitivity to the magnetic field of the studied MFT-SAF mock-ups was 217 mV/Oe in the magnetic field range ±5 Oe (±0.5 mT) at a supply voltage of 5 V.
Tags: magnetic field transducer magnetic flux concentrators spin-tunnel magnetoresistive nanostructures synthetic antiferromagnet wheatstone bridge scheme концентраторы магнитного поля мостовая схема преобразователь магнитного поля синтетический антиферромагнетик спин-туннельные магниторезистивные наноструктуры