MERI. More than semi-century at the forward edge of domestic microelectronics DOI: 10.22184/1993-8578.2020.13.5.248.254
Measurement of silica nanoparticle sizes by the dynamic light scattering and acoustic attenuation spectroscopy methods DOI: 10.22184/1993-8578.2020.13.5.308.314
Two methods were applied to characterize the dimensions of nanoparticles in colloidal solution. Dynamic light scattering and acoustic attenuation spectroscopy are compared with one another. The accuracy and precision of these two methods applied to nanoparticles of silica were determined. The advantages and disadvantages of the methods of dynamic light scattering and acoustic spectroscopy in determining the size of nanoparticles are revealed.
Integration of scanning probe microscopy methods and matrix optical superlenses technology DOI: 10.22184/1993-8578.2020.13.5.258.262
Observation of wildlife using nanometer spatial resolution is of paramount importance for understanding many fundamental processes, for example, functioning of the living neuron networks, bacterial antibiotic resistance, and interaction of viruses with molecular receptors. To obtain complete and reliable information, a combination of highly informative methods is required, which include optical and scanning probe microscopy. On their basis, a digital bionanoscopy platform is being developed.
High performance aerodynamic nebulizer for liquid reagents based on the Laval nozzle DOI: 10.22184/1993-8578.2020.13.5.264.274
The authors propose a high-performance device for supplying a liquid reagent for the chemical vapor deposition of high-purity quartz. The liquid silicon-containing reagent is supplied by converting it into an aerosol using an aerodynamic nebulizer with a flat Laval nozzle incorporating an internal body. The developed design allows of achieving a high flow rate of the liquid reagent by changing the nozzle cross-sections so as to adjust the speed of the nebulizer gas. The proposed design features higher manufacturability and simple adjustment of the reagent flow rate over a wide range, as distinct from the common coaxial nozzle designs.
Advanced innovative developments of the Ministry of Science and Higher Education of the RF are presented at the VI International Military Forum "Army-2020".
Synthesis of ultrafine tin dioxide by flame spray pyrolysis for inkjet printing of sensitive elements of gas sensors DOI: 10.22184/1993-8578.2020.13.5.276.283
Inkjet printing of stable suspensions on top of the MEMS structures with micro-heater has been used for thick film layer formation on the basis of nanocrystalline SnO2 with uniform porous structure. Gas sensitivity of the obtained materials is described.
Influence of hydrothermal nanosilica on germination of wheat seeds in the dark mode as one of the methodological aspects of biotechnology for obtaining functional products based on microgreens 10.22184/1993-8578.2020.13.5.284.297
The research is devoted to study certain nanotechnological aspects of hydrothermal nanosilica applications for obtaining a new functional food product called microgreens (as exemplified by winter wheat). In terms of methodology a question is raised concerning use of the stage when the seeds germinate for further growth of microgreens with the aid of nanotechnologies in a dark mode without additional artificial lightning. Treatment of seeds with hydrothermal nanosilica at concentrations of 0.1% and 0.01% contributed to an increase in seed germination by 5–6%, the average sprout height (microgreens) by 11.3–11.9% and plant biomass by 11.0% (0.1% solution) and 17.6% (0.01%). The lower concentrations (0.001% and 0.0001%) had little effect on the change in the sowing properties of seeds and the growth of seedlings while the higher concentrations (1%) produced a negative effect (germination decreased by 4%, and the height of sprouts by 14%). It has been shown that for improving seed germination at the first stages, when growing microgreens of winter wheat in the dark mode without additional illumination, it is promising to use hydrothermal nanosilica for seed treatment at a concentration of 0.01%, as well as 0.1%. Treatment with nanosilica at different concentrations leads to the higher accumulation of silicon in the sprouts by 1.5–2 times compared to the control samples. The content of phosphorus, sulfur, magnesium and sodium in the sprouts remained relatively stable. The calcium content increased in the case of using silica of 0.01% concentration, potassium –
in the case of 0.0001%. An increase in the content of zinc and copper was noted during the treatment of wheat seeds with aqueous sols of nanosilica in the variant 0.001%.
Probe microscopy in the study of changes in growth, mobility, metabolism and secretion of cancer cells DOI: 10.22184/1993-8578.2020.13.5.298.302
Modern methods of scanning probe microscopy make it possible to obtain a detailed pattern of the vital cells topology including cancer cells with a nanoscale spatial resolution during their growth. The development of high-speed atomic force microscopy enabled to produce images of cells with millisecond spatial resolution. Besides, it is possible to study a rough surface of vital cells by changing the ion current flow without force action on a cell using scanning capillary microscopy (ion-conducting microscopy). The use of scanning capillary microscopy in the study of cancer cells opens up new opportunities for screening of drugs in order to obtain new data on the influence of changes in external conditions on the kinetics of tumor growth and the new data on the vital activity of cells.
Analysis and study of material research and technological factors when creating film converters DOI: 10.22184/1993-8578.2020.13.5.304.307
The analysis and research of material science and technological factors in the creation of film converters is carried out, the requirements for materials and their properties, the technology for the formation of converter elements are determined. It is shown that taking into account materials science and technology factors ensures that the parameters of the film converter meet the required parameters, resistance to external factors, obtaining films of the original composition, and stability of the production technology.