Materials Literature
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The paper discusses one of the promising approaches for the synthesis of graphene formed at the interface in the Langmuir bath. The results of the investigation of the formation of pyren monolayers (both initial elements of graphene) and a mixture of pyrene and arachidic acid are presented. It is shown how the mechani…
Highly efficient SERS substrates were prepared PLD and chemical methods by combining two quasi-homogeneous ∼1 cm 2 monolayers of 5-8 nm Au plasmonic coupled nanoparticles separated by chitosan based polymer film spacer thinner than 10 nm. Plasmonic modes of individual Au particles in each monolayer are coupled and for…
The article describes the use of induction heat treatment for products made of 1.3343 tool steel (analogue R6M5) and 12Cr18Ni10Ti chromium-nickel steel. The changes in the surface morphology parameters as well as in hardness after strengthening heat treatment were studied. The hardness of tool steel after quenching (f…
The aim of this study was to evaluate and characterize various properties of composite board prepared from oil palm tree flour (KK), maleic anhydride grafted polypropylene ( PPd-g-AM), divinyl benzene (DVB) and benzoil peroxide (BPO). The oil palm oil trunk was floured with a size of 80 mesh and dried in an oven so th…
The spin-polarized band structures of an ultrathin Pb/MoTe 2 /Pb heterostructure are calculated via first-principles density functional theory. The electron–phonon interaction and the superconducting properties of the ultrathin Pb/MoTe 2 /Pb heterostructure are studied by using the fully anisotropic Migdal–Eliashberg…
We present an experimental prove of high robustness of epitaxial 4H-SiC graphene to oxidation processes. During a post-fabrication cleaning procedure we noticed that epitaxial graphene is extremely stable to ozone treatment. We analyse graphene properties using both electron transport measurements and numerical calcul…
This work is devoted to the analysis of problems of the present methods of surface treatment and the preparation of structures with nanoscale. The urgency of the work is caused by the fact that it uses the method of obtaining structures without the standard operations of optical lithography. The main methods of formin…
Ga 1- x In x As y P 1− y epitaxial layers with compositions x = 0.77 − 0.87, y = 0.07 − 0.42 and thicknesses 620 − 850 nm were grown by MOCVD method on InP substrates. Temperature, pressure and gas mixture composition were held constant during growth procedure. Secondary-ion mass spectrometry showed change of V-group…
Super-resolution optical fluctuation imaging is dependent on the blinking frequency of fluorophores. Consequently, improvement of the photoluminescence (PL) blink frequency is important. This is achieved for 3C–SiC nanocrystals (NCs) by simply increasing the excitation power. Using an excitation of 488 nm with powers…
The article considers a high-voltage AC plasma torch for air reforming of natural gas. It has two inputs of plasma-forming gases: the electrode zone (for shielding gas) and the arc zone (for the main plasma-forming gas). The voltage drop on the arc increases with increasing methane flow rate due to the formation of hy…
In this work synthesis and study of novel nanostructured organosilicon luminophores (NOLs) based on p -terphenyl and POPOP (1,4- bis (5-phenyloxazol-2- yl ) benzene) moieties with unique optical properties is reported. NOLs are branched molecules composed from a donor-acceptor-donor framework with different optical ba…
The VEPP-2000 electron–positron collider has been operating at the Budker Institute of Nuclear Physics (BINP) since 2010. Applying the concept of round colliding beams allowed the record value of the beam–beam parameter ξ ∼ 0.12 to be reached. The upgrading of the VEPP-2000 complex, including the connection to the new…
The article describes the formulation of an experiment to study the process of condensation of steam from a mixture with air in the canals of a plate heat exchanger. An experimental facility for the study of heat exchange processes in the channels of a plate heat exchanger was described and constructed. As a result of…
Miscibility gaps in ternary III-V and III-N alloys often prevent their compositional tuning required for new generation electronic and optoelectronic devices. Here, we show how the miscibility gaps are suppressed on kinetic grounds at high enough supersaturations in liquid droplets catalyzing the vapor-liquid-solid gr…
One of the characteristic features of multiferroic materials is the dimensional effect, when the physical properties of a sample depend on its size. To describe this effect, it is necessary to take into account not only the basic physical quantities: the electric field, polarization, strain tensor, stresses, temperatu…
This paper presents results of the thermodynamic analysis of chemical processes in the Ni/Cr/Si structure during the formation of catalytic centers and the growth of carbon nanotubes on them. It is shown that before starting CVD process Ni/Cr/Si structure is oxidized in atmosphere, and the Cr underlayer oxidation occu…
In this work, we present an approach to the synthesis of hybrid multifunctional nanomaterials with pronounced functional properties (SERS, adsorption properties). One-step laser-induced deposition method was used to synthesize hybrid Au-Ag@C nanoparticles. Physicochemical and functional properties of obtained nanostru…
The present paper describes kinetic regularities of the removal of the typical synthetic dye, methylene blue (MB), from aqueous solutions by two graphene-organic composites, polyhydroquinone (PHQ)/graphene and polyamine-cumulene (PAC)/carbon nanotubes (CNTs). To study the adsorption kinetics under dynamic conditions s…
The study is devoted to the dynamics of the appearance and development of defects at the nanoscale level for stainless steel and screw bronze of certain grades using electron, atomic force microscopy. The main mechanisms of destruction have been identified and a comparative analysis of the materials studied has been c…
Organic-inorganic halide perovskite single crystals undergo phase transition of being cubic, tetragonal, or orthorhombic depending on the temperature. We investigated the CH 3 NH 3 PbBr 3− x I x single crystals grown by the inverse temperature crystallization method with temperature-dependent UV-Vis absorption and pho…