rus
Nanotechnology
I.V.Yaminsky, А.I.Akhmetova
PROBE MICROSCOPY WORKSHOP AT THE PHYSICAL DEPARTMENT OF LOMONOSOV MOSCOW STATE UNIVERSITY https://doi.org/10.22184/1993-8578.2022.15.6.328.332
. Scanning probe microscopy is a simple method to study materials, including polymers and biopolymers at nanometre resolution in liquid and air. Probe microscopy allows of visualizing the surface structure of samples, assess their conformation, adhesion and adsorption on different substrates. The method does not require time-consuming sample preparation, it is sufficient t to just place a sample on an atomically smooth substrate, such as graphite and mica. Probe microscope skills and ability to process the data present an important step in the training programme for young professionals. To develop these competences, the Physical department of MSU is continuously improving and upgrading the probe microscopy workshop. The workshop is composed of eight laboratory work sessions on key topics and includes training in both basic and advanced skills in microscope handling, processing and interpretation of the probe microscopy data.
PROBE MICROSCOPY WORKSHOP AT THE PHYSICAL DEPARTMENT OF LOMONOSOV MOSCOW STATE UNIVERSITY https://doi.org/10.22184/1993-8578.2022.15.6.328.332
. Scanning probe microscopy is a simple method to study materials, including polymers and biopolymers at nanometre resolution in liquid and air. Probe microscopy allows of visualizing the surface structure of samples, assess their conformation, adhesion and adsorption on different substrates. The method does not require time-consuming sample preparation, it is sufficient t to just place a sample on an atomically smooth substrate, such as graphite and mica. Probe microscope skills and ability to process the data present an important step in the training programme for young professionals. To develop these competences, the Physical department of MSU is continuously improving and upgrading the probe microscopy workshop. The workshop is composed of eight laboratory work sessions on key topics and includes training in both basic and advanced skills in microscope handling, processing and interpretation of the probe microscopy data.
Tags: 3d imaging biopolymers femtoscan polymers scanning probe microscopy scanning tunnelling microscopy биополимеры полимеры сканирующая зондовая микроскопия сканирующая туннельная микроскопия трехмерная визуализация
E.V.Gladkikh, K.S.Kravchuk, V.N.Reshetov, A.A.Rusakov, A.S.Useinov
SIMULATION OF THE INDENTATION OF EUROFER97 STEEL AFTER ION RADIATION BY THE FINITE ELEMENT METHOD https://doi.org/10.22184/1993-8578.2022.15.6.336.343
The combination of ion irradiation and nanoindentation presents a vast field of research which includes not only experiments but also modeling that can reveal the features of the deformation behavior of materials at the micro- and nanoscale. The modeling carried out in the work made it possible to evaluate the correspondence between the strength parameters measured in the course of tensile tests of macrosamples irradiated with neutrons and the results of dynamic instrumental indentation of the samples that were used in the experiment on ion irradiation. The increase in hardness calculated during the simulation turned out to be comparable with that obtained experimentally, which indicates efficiency of the technique. The plastic behavior inherent in the samples subject to the experiment which manifests itself in a decrease in the height of the rolls with an increase in the irradiation dose was also confirmed in the simulation.
SIMULATION OF THE INDENTATION OF EUROFER97 STEEL AFTER ION RADIATION BY THE FINITE ELEMENT METHOD https://doi.org/10.22184/1993-8578.2022.15.6.336.343
The combination of ion irradiation and nanoindentation presents a vast field of research which includes not only experiments but also modeling that can reveal the features of the deformation behavior of materials at the micro- and nanoscale. The modeling carried out in the work made it possible to evaluate the correspondence between the strength parameters measured in the course of tensile tests of macrosamples irradiated with neutrons and the results of dynamic instrumental indentation of the samples that were used in the experiment on ion irradiation. The increase in hardness calculated during the simulation turned out to be comparable with that obtained experimentally, which indicates efficiency of the technique. The plastic behavior inherent in the samples subject to the experiment which manifests itself in a decrease in the height of the rolls with an increase in the irradiation dose was also confirmed in the simulation.
Tags: elastic-plastic deformation eurofer97 steel finite element method hardness indentation ion irradiation индентирование метод конечных элементов облучение ионами сталь eurofer97 твердость упруго-пластическая деформация
Nanomaterials
V.I.Kapustin, I.P.Li, N.E.Kozhevnikova
TRACE IMPURITIES HAVE SYNERGISTIC EFFECTS ON ELECTRONIC STRUCTURE OF OXIDE-NICKEL CATHODES DOI: https://doi.org/10.22184/1993-8578.2022.15.6.354.359
Using the methods of electron spectroscopy for chemical analysis (ESCA) and characteristic electron energy losses (EEL), it was found that the joint doping of barium oxide crystallites with nickel and such elements as yttrium, rhenium, palladium and strontium leads to a synergistic effect – a decrease in the curvature of the energy bands of crystallites at their surface, that is, to a decrease in the work function of the material.
TRACE IMPURITIES HAVE SYNERGISTIC EFFECTS ON ELECTRONIC STRUCTURE OF OXIDE-NICKEL CATHODES DOI: https://doi.org/10.22184/1993-8578.2022.15.6.354.359
Using the methods of electron spectroscopy for chemical analysis (ESCA) and characteristic electron energy losses (EEL), it was found that the joint doping of barium oxide crystallites with nickel and such elements as yttrium, rhenium, palladium and strontium leads to a synergistic effect – a decrease in the curvature of the energy bands of crystallites at their surface, that is, to a decrease in the work function of the material.
Tags: cathode material influence of micro-impurities metal-porous cathodes thermionic emission влияние микропримесей катодный материал термоэлектронная эмиссия
V.V.Syzrantsev
THE ROLE OF THE SURFACE STRUCTURE OF NANOPARTICLES IN THEIR HARDENING OF EPOXY RESIN https://doi.org/10.22184/1993-8578.2022.15.6.346.353
A comparative study of the hardening of the cured epoxy resin with SiO2 and Al2O3 nanoparticles obtained by various methods has been carried out. The relationship between the strength of the centres on the surface of the particles, the value of their fractal dimension, and the thickness of the interfacial layer they create is shown.
THE ROLE OF THE SURFACE STRUCTURE OF NANOPARTICLES IN THEIR HARDENING OF EPOXY RESIN https://doi.org/10.22184/1993-8578.2022.15.6.346.353
A comparative study of the hardening of the cured epoxy resin with SiO2 and Al2O3 nanoparticles obtained by various methods has been carried out. The relationship between the strength of the centres on the surface of the particles, the value of their fractal dimension, and the thickness of the interfacial layer they create is shown.
Tags: fractal dimension nanoparticles nanoparticle synthesis polymer nanocomposite surface centers наночастицы поверхностные центры полимерный нанокомпозит синтез наночастиц фрактальная размерность
Equipment for nanoindustry
V.S.Shcherbakova, A.P.Rotar’, A.M.Bazinenkov, D.A.Ivanova, V.P.Mikhailov
RESEARCH OF THE ACTUATORS CHARACTERISTICS BASED ON DIELECTRIC ELASTOMERS DOI: https://doi.org/10.22184/1993-8578.2022.15.6.360.366
The results of experimental studies of the characteristics affecting the movement of actuators based on dielectric elastomers under the action of an external electric field are given. The influence of the concentration of fillers: barium titanate, burnt and unburned quartz on the modulus of elasticity and deformation of the dielectric elastomer at high control voltage was revealed.
RESEARCH OF THE ACTUATORS CHARACTERISTICS BASED ON DIELECTRIC ELASTOMERS DOI: https://doi.org/10.22184/1993-8578.2022.15.6.360.366
The results of experimental studies of the characteristics affecting the movement of actuators based on dielectric elastomers under the action of an external electric field are given. The influence of the concentration of fillers: barium titanate, burnt and unburned quartz on the modulus of elasticity and deformation of the dielectric elastomer at high control voltage was revealed.
Tags: actuator deformation dielectric elastomer electric field modulus of elasticity актуатор деформация диэлектрический эластомер модуль упругости электрическое поле
Conferences, Exhibitions, Seminars