A5032974060- Diamond and Carbon-based Materials Research
- Boron and Carbon Nanomaterials Research
- High-pressure geophysics and materials
- Advanced Theoretical and Applied Studies in Material Sciences and Geometry
- Polymer Science and Applications
- Advanced materials and composites
- Force Microscopy Techniques and Applications
- Fullerene Chemistry and Applications
- Material Properties and Applications
- Metal and Thin Film Mechanics
- Advanced ceramic materials synthesis
- Insect and Arachnid Ecology and Behavior
- Insect and Pesticide Research
- Advanced Surface Polishing Techniques
- Carbon Nanotubes in Composites
- Plant and animal studies
- Catalysts for Methane Reforming
- Semiconductor materials and interfaces
- Silicon and Solar Cell Technologies
- Graphene research and applications
- Epoxy Resin Curing Processes
- Advanced Materials Characterization Techniques
- Ferroelectric and Piezoelectric Materials
- Catalysis for Biomass Conversion
- Thermal Radiation and Cooling Technologies
Technological Institute for Superhard and Novel Carbon Materials
2015-2024
Kuban State Agrarian University
2019-2022
Saint-Petersburg State University of Technology and Design
2021-2022
Moscow Institute of Physics and Technology
2021
Nanodiamond in a 2–5-nm size interval (which is typical for an appearance of quantum confinement effect) show Raman spectra composed 3 bands at 1325, 1600, and 1500 cm−1 (at the 458-nm laser excitation) which shifts to 1630 257-nm excitation. Contrary sp2-bonded carbon, relative intensities do not depend on 458- excitation wavelengths, halfwidth intensity 1600 band does change visibly under pressure least up 50 GPa. Bulk modulus nanodiamond determined from high-pressure study around 560...
We propose a methodology for the calculation of nanohardness by atomistic simulations nanoindentation. The is enabled machine-learning interatomic potentials fitted on fly to quantum-mechanical calculations local fragments large nanoindentation simulation. test our calculating nanohardness, as function load and crystallographic orientation surface, diamond, AlN, SiC, BC2N, Si comparing it calibrated values macro- microhardness. observed agreement between computational experimental results...
We observed resonance effects in the Raman scattering of nanodiamonds with an average size 2–5 nm excited at a wavelength 1064 (1.16 eV). The resonant spectrum consists bands wavelengths 1325 and 1600 cm−1, band 1100–1250 plateau range from 1420 to 1630 cm−1. When away (at 405 nm, 3.1 eV), only three 1325, 1500, It is important note that additional lines (1500 cm−1) belong sp3-hybridized carbon bonds. phonon density states for (~1 nm) was calculated using moment tensor potentials (MTP),...
High-resolution transmission electron microscopy (HRTEM) studies of silicon after treatment in a planetary mill have been performed. It is shown that along with the initial phase silicon, Si-I, sample also contains some high-pressure phases: Si-III (Kasper phase) and Si-IV (lonsdaleite). We studied orientation relationship between particles different phases, finding there are, general, two mechanisms formation Si-IV: (1) through stacking faults formation; (2) transformation first to Kasper...
The present study addresses the problems of catalytic synthesis C60-based 3D polymers in presence carbon disulfide CS2. It is shown that CS2 lowers pressure fullerite polymerization at room temperature. In particular, which ultrahard C60 phase formed decreases from 18 GPa to 7 GPa. catalyst plays no significant role temperature and low pressures up 6 When + heated 1200 K, further reduced 2–4 Based on TEM data, we propose a polymer structure based obtained by synthesis.
This paper presents an integrated measuring system combining a diamond anvil cell (DAC) and high overtone bulk acoustic resonator (HBAR) operating at the microwave frequency band as 2.8–8.8 GHz. We have studied several metallic (W, Zr) semiconductor (Si) samples under pressure up to ∼16 GPa. As HBAR, we used “Al/Al0.72Sc0.28N/Mo/(100) diamond” structure utilizing piezoelectric aluminum–scandium nitride film. observed that pressure, Q-factor of HBAR decreases but remains value 2500–3000,...
The series of bulk samples ceramics C <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">60</sub> /Cer (Cer = B xmlns:xlink="http://www.w3.org/1999/xlink">4</sub> C, Al xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> O xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> , Si N and c-BN) with different volumetric contents nanocarbon were prepared from powder mixtures obtained by grinding in a ball mill, followed sintering two methods: (a)...
The structure of silicon, along with mixtures silicon and boron carbide (B4C) powders diamond different proportions after mechanoactivation, has been studied by transmission electron microscopy (TEM) methods. It was shown that experience twinning according to the known mechanisms. In addition initial phase a lattice, particles two other phases were detected for including: Kasper (SiIII) lonsdaleite (SiIV). We established transformations in can happen due