"Micro" – a quarter century in metrology. Development and manufacture of exclusive import substitutional domestic equipment DOI: 10.22184/1993-8578.2020.13.6.328.331
Physical and chemical properties of carbon and fluorocarbon coatings obtained by pecvd at atmospheric pressure in a dynamic deposition mode DOI: 10.22184/1993-8578.2020.13.6.364.371
This article demonstrates a possibility of carbon and fluorocarbon coatings formation in a continuous (dynamic) mode of PECVD at atmospheric pressure using a low-frequency plasmatron of low-temperature plasma. The contact angle of wetting of the obtained coatings was established and the study was carried out using AFM.
Modeling of the properties of individual colloidal silicon oxide nanoparticles DOI: 10.22184/1993-8578.2020.13.6.372.382
This article describes interaction between dispersed phase particles in colloidal solution and, particularly, nanoparticles of silicon oxide contained in an electrolyte solution. The proposed theoretical analysis of this interaction develops the DLVO theory. In the frame of the theory it was assumed that silicon oxide nanoparticles in the electrolyte solution are the assembly of the charged particles but, at the same time, they are electrically neutral. It was assumed that charged particle sizes are much smaller in comparison with the distance between them. This paper attempts to describe interaction of colloidal particles in the framework of the point charges model interaction. We suggest a simple model describing interaction of two systems of electric charges placed at arbitrary distances from each other. The conducted analysis of the obtained potential dependencies versus "rigid" colloidal particles revealed presence of three singular points. These points are associated with a qualitative change in the type of particle interaction with each other, which makes it possible to distinguish four types of colloidal particles found in electrolyte solutions. The calculations indicate a possibility of ultrasoft colloidal systems existence with long-range forces of interaction of particles with each other. In such systems formation of long-range hyper structures, in other words, formation of aggregates without short-range interaction between particles is possible. A system of colloidal particles classification is proposed on the basis of analysis of obtained results. A formula that describes viscosity of a colloidal solution depending on the volume part of the disperse phase and the parameter characterizing the law of attraction in the interaction of colloidal particles in case of "rigid" colloidal systems was obtained.
Application of machine vision algorithms for automatic Vickers microhardness measurement DOI: 10.22184/1993-8578.2020.13.6.392.398
The capabilities of modern machine vision algorithms to analyze prints obtained on the NanoScan-HV domestic microhardness tester are demonstrated. The possibility of automating the microhardness measurement procedure for a wide range of materials under study has been confirmed.
Tests of high-precision spindles using LHIIS holographic nano-measuring systems DOI: 10.22184/1993-8578.2020.13.6.384.390
It was studied the radial and axial runout of a spindle using precision nano-holographic measuring systems – linear and angular displacements – length meters and an ultra-precision rotary table. Spindle rotation accuracy was estimated by the value of radial and axial wavering of its front end. The spindle carries out a mechanical rotational movement. During the rotational movement of the spindle, all its points, including the outer surface, describe circles located in parallel planes. The centers of all circles lie on the same line perpendicular to the planes of circles called the axis of rotation. The axis of rotation of the spindle is located inside it. The wavering of the spindle is examined on its upper and lateral surfaces.
Development of technology of nanostructures with a spin-tunnel magnetoresistive effect DOI: 10.22184/1993-8578.2020.13.6.332.337
The results of experimental studies of multilayer nanostructures producing with spin-tunnel magnetoresistive (STMR) effect are presented. When STMR nanostructures were formed using integrated technology, the STMR effect increased up to 157.5%.
Scanning probe microscopy in solving virology problems DOI: 10.22184/1993-8578.2020.13.6.340.344
Scanning probe microscopy provides three-dimensional visualization of viruses in various media, for example, liquid and air. In addition to three-dimensional topography, it is possible to measure such properties as mechanical rigidity, adhesion, crystallization tendency, aggregation of particles on a substrate, etc. Characterization of animal and human viruses is the subject of numerous studies due to their potential harm to higher organisms.
Peculiarities of the concentration effect of hydrothermal nanosilica in the pre-sowing treatment of plant seeds upon indicators of the germinative energy and germinating ability in laboratory dark growth DOI: 10.22184/1993-8578.2020.13.6.346.358
The research is devoted to the study of the influence of hydrothermal nanosilica in different concentrations (0.05%, 0.01%, 0.005%, 0.001% and 0.0005%) on seed germination of 11 agricultural crops (15 genotypes). Four types of reaction of germinating seeds to the effect of SiO2 nanoparticles in the specified concentration range have been established. These patterns are typical for both the "seed germinative energy" and "seed germinating ability" indicator, but they do not always coincide for the same crop and variety. In many cases hydrothermal nanosilica contributes to an increase in seed germinative energy (at an early stage of germination) to a greater extent than generating ability.
Digital bionanoscopy platform based on probe microscope DOI: 10.22184/1993-8578.2020.13.6.360.363
The digital bionanoscopy platform can be used to solve a wide range of problems in biology and medicine. Its capabilities are applicable to study actual problems in biology and medicine, such as early detection of viruses, bacterial resistance to antibiotics and topological issues of neuronal networks.