Vol 17, No 1 (2024)

Thin-film coatings prepared by thermal emission sputtering by the number of metals and alloys in a vacuum chamber close to the space vacuum conditions for the first in the world space scanning tunnel microscope made in Russia, and designed as an Earth satellite with autonomous power supply and launched in summer 2023 for the purpose of gathering statistics on the size and density of micro- and nano-particles of dust and meteorites in Earth orbits. Due to the lack of previous scientific interest in sputtering in low vacuum because of the poor purity of the coatings obtained, data on coatings were obtained that are unique and in demand in practice due to the need for objects surface conductivity of observed in the scanning tunnel microscope. Conclusions about applicability of some metals and alloys to sputtering at scanning tunnel microscope operation in space are presented.

The response of cells to mechanical signals plays a key role in biological processes such as organ development, tissue regeneration, aging and cancer development. Changes in mechanical properties, including stiffness and viscosity, show how cells and tissues react to stress and how their biological functions depend on it. Scanning probe microscopy (SPM) is a versatile tool for quantitative characterization of the mechanical properties of tissues and cells in vivo. Data on the mechanical properties of biological objects obtained using atomic force and capillary microscopy can be associated with biological processes and pathologies in tissues.

The paper is devoted to the SmartLAB "smart" modular laboratory development for technical universities. The paper presents the results of development of three laboratory modules: a module for monitoring climate readings, blinds control and an access module to the office. Data transfer from devices to the website using a microcomputer has been established. The materials obtained can be used for preparing the methodological manuals and further training of students in practical skills in the framework of IoT courses and other related disciplines.

The purpose of this study is to develop and demonstrate a technique for preparing a spheroconical diamond indenter with a characteristic tip size of about 5 μm. The production of the described tip is realized by using a picosecond laser to form the workpiece and a focused ion beam for the final processing of the product. An atomic force microscope was used to control the geometry during manufacturing. The height of the working area of the obtained tip was 1 µm. The study also demonstrates the applicability of the fabricated indenter and provides load-insertion diagrams during indentation and AFM images of the residual indentations.

In the presented article studies were carried out of the influence of multiple martensitic transformations B2-B19’ on the structure and temperatures of transformations in different structural states of the TiNi alloy. It is shown that in coarse-grained, ultrafine-grained and nanocrystalline TiNi alloys, consistent changes occur in the microstructure and temperatures of phase transformations, with an increase in the number of thermal cycles to n=100 with rapid heating and rapid cooling to -196 °C. Transformation temperatures in the ultrafine-grained Ti_49.15Ni_50.85 state are more resistant to thermal cycling (TC) than in the coarse-grained state. The formation of martensite nanotwins in the nanostructural state after multiple thermal cycles was discovered.

In present work, the parameter of the dispersion degree of nanofiller is introduced, which characterizes quantitatively the dispersion level of the latter in nanocomposites polymer/carbon nanotube. This parameter is a function of size of the nanofiller aggregate and content. The relationship between the dispersion level of the nanofiller and the reinforcement degree is shown, which makes it possible to predict the properties of the nanocomposites under consideration.