https://www.elibrary.ru/title_about_new.asp?i
1605-8119
Materials physics and mechanics
29
2
2016
1-73
RAR
RUS
107-115
Institute of Problems of Mechanical Engineering RAS
Nazarov
St.Petersburg, Russia
University of Oulu
Ruotsalainen
Oulu, Finland
University of Oulu
Uusitalo
Oulu, Finland
Multifarious transmission conditions in the graph models of carbon nano-structures
Considering a periodic carbon nano-structure of thin quantum waveguides, we list all possible transmission conditions at the vertices of the hexagonal graph in the onedimensional model. We study the boundary layer phenomenon in the symmetric infinite tripod waveguide and outline an approach to evaluate almost standing waves, which determine the type of the transmission conditions.
periodic carbon nano-structure; graph models; one-dimensional model
https://mpm.spbstu.ru/article/2016.51.1/
MPM229_01_nazarov.pdf
RAR
RUS
116-124
Institute of Problems of Mechanical Engineering RAS
Nazarov
St.Petersburg, Russia
University of Oulu
Ruotsalainen
Oulu, Finland
University of Oulu
Uusitalo
Oulu, Finland
Localized waves in carbon nano-structures with connected and disconnected open waveguides
A hexagonal lattice of quantum waveguides is considered with thickening or thinning of ligaments, which form open waveguides in the periodic nano-structure. Propagation of localized waves along the open connected and disconnected waveguides is studied and nodes in the lattice are indicated that support trapped modes with the exponential decay in all directions.
carbon nano-structure; propagation of localized waves
https://mpm.spbstu.ru/article/2016.51.2/
MPM229_02_nazarov.pdf
RAR
RUS
125-132
CICESE, Centro de Investigación Científica y de Educación Superior de Ensenada
Santiago Nuñez
Ensenada, Mexico
CICESE, Centro de Investigación Científica y de Educación Superior de Ensenada
Shlyagin
Ensenada, Mexico
P-4505-2016
7006034020
0000-0002-2973-8645
Institute of Problems of Mechanical Engineering RAS
Kukushkin
S.A.
sergey,a.kukushkin@gmail.com
St.Petersburg, Russia
Nucleation of nanopores in glass optical fibers under influence of tensile stress: experiment
The article reports on observation of nanopores nucleated under a tensile stress in the core of the germanosilicate optical fibers doped with boron. Pores were observed with an atomic-force microscope on the faces of cleaved fiber tips. Under certain experimental conditions, pores form a quasi-periodic structure and their sizes are in a good agreement with predictions of the earlier proposed model based on the theory of phase transitions. The theoretically estimated threshold stress level for effective nucleation of pores corresponds well to the results of experimental observations.
glass optical fibers; tensile stress; nucleation of nanopores
https://mpm.spbstu.ru/article/2016.51.3/
MPM229_03_nunez.pdf
RAR
RUS
133-137
Altai State Technical University
Poletaev
Gennady M.
Barnaul, Russia
Altai State Technical University
Medvedeva
Barnaul, Russia
Siberian State Industrial University
Zorya
Novokuznetsk, Russia
Altai State Technical University
Novoselova
Barnaul, Russia
I.I. Polzunov Altai State Technical University
Starostenkov
Barnaul, Russia
Molecular dynamics simulation of interaction of hydrogen impurity with twist boundaries in Pd and Ni
The study of the interaction of hydrogen impurity with (100) and (111) twist boundaries in Ni and Pd was held by the method of molecular dynamics. It is shown that twist boundaries may act as hydrogen traps, but less effective in comparison with vacancies and edge dislocations. The energy of the hydrogen connection with the twist boundary, according to the obtained data, does not exceed 0.1 eV for both metals.
molecular dynamics; metal; hydrogen; grain boundary; twist boundary; screw dislocation; bond energy; energy of absorption
https://mpm.spbstu.ru/article/2016.51.4/
MPM229_04_poletaev.pdf
RAR
RUS
138-144
Saint Petersburg State University
E.G. Zemtsova
St.Petersburg, Russia
St.Petersburg State University
Orehhov
St.Petersburg, Russia
St.Petersburg State University
Arbenin
St.Petersburg, Russia
Ufa State Aviation Technical University
Valiev
R.Z.
Ufa, Russia
Saint Petersburg State University
Smirnov
St.Petersburg, Russia
The creation of nanocoatings of various morphology on the basis of titanium dioxide on a titanium matrix for bone implant
In this work, we have implemented the approach to improve the biocompatibility of bone implants based on creating relationships between the implant and the living tissue due to surface modification. Bioactive surface for titanium media was created through the creation of a mesoporous layer of TiO2 films with well-developed micron-sized structure. For the directional regulation of biomedical properties of the surface of nanometals used Sol-gel method. This method allowed us to obtain a mesoporous film of titanium oxide on the metal surface in the nanometer diapazone, which greatly improves the adhesion of osteoblasts (bone cells).
bone implant; biocompatibility; titanium; titanium dioxide film; sol-gel method; porosity
https://mpm.spbstu.ru/article/2016.51.5/
MPM229_05_zemtsova.pdf
RAR
RUS
145-149
ITMO University
Shirshneva-Vaschenko
St.Petersburg, Russia
Togliatti State University
Sosnin
Togliatti, Russia
ITMO University
Nuryev
St.Petersburg, Russia
ITMO University
Gladskikh
St.Petersburg, Russia
ITMO University
Liashenko
St.Petersburg, Russia
ITMO University
V.E. Bougrov
St.Petersburg, Russia
F-1445-2014
7202768874
0000-0003-3738-408X
ITMO University
Romanov
Alexey
alexey.romanov@niuitmo.ru
St.Petersburg, Russia
Electrical and optical properties of transparent conducting ZnO:Al/AgNP multilayer films
In this work, zinc oxide thin films doped with Al were prepared using sol-gel deposition technique. Fabricated films were up 1 µm thick and contain several layers of ZnO:Al deposited on quartz substrate. The films had prevalent (001) growth orientation. The resistivity of the films was reduced significantly after annealing in vacuum (10-5 Pa) at 650 °C and achieved 0.3 Ω·сm. The optical properties of ZnO:Al/AgNP films were tested. The extinction spectra of the films showed the shift of AgNP plasmon resonance with respect to the position being characteristic to silver nanoparticles on fused quartz substrate. The optical radiation action increased the conductivity of ZnO:Al/AgNP films 5 times. An observation of photocurrent was associated with the excitation of plasmon resonance in nanoparticles and was described by the mechanism of "hot" electrons injection in the conduction band of ZnO: Al.
zinc oxide thin films; doping of Al and Al/AgNP; sol-gel deposition technique; resistivity; optical properties
https://mpm.spbstu.ru/article/2016.51.6/
MPM229_06_vaschenko.pdf
RAR
RUS
150-157
Tver State University
Zubchaninov
Tver, Russia
Tver State University
Alekseev
Tver, Russia
Tver State University
Alekseeva
Tver, Russia
Verification of the postulate of the isotropy and numerical simulation of the deformation of materials on a complex smooth trajectories
The article presents the results of numerical modeling of deformation of steel 45 using general and linearized models of the theory of processes on flat smooth trajectories with curvilinear sections. The calculation results are compared with experimental data on the deformation of thin-walled cylindrical specimens on using the SN-EVM testing system. It is shown that for the implemented types of experimental trajectories, symmetric about the bisectors of angle, the postulate of isotropy by A.A. Ilyushin performed quite well.
plasticity
smooth trajectory of deformation
physical experiment
the postulate of isotropy
mathematical model
https://mpm.spbstu.ru/article/2016.51.7/
MPM229_07_zubchaninov.pdf
RAR
RUS
158-165
Ioffe Institute
Priadko
St.Petersburg, Russia
Peter the Great St. Petersburg Polytechnic University
Pulnev
St.Petersburg, Russia
Ioffe Institute
Nikolaev
St.Petersburg, Russia
Ioffe Institute
Rogov
St.Petersburg, Russia
Ioffe Institute
Shmakov
St.Petersburg, Russia
Ioffe Institute
Golyandin
St.Petersburg, Russia
Ioffe Institute
Chikiryaka
St.Petersburg, Russia
Investigation of single crystal Cu-Al-Ni alloy bending force elements for linear motors
Functional characteristics of super-elastic bending force element made of single crystal Cu-Al-Ni alloy were experimentally studied. The deformation of the bending element was found to be uneven along the length of the element and had a maximum value at the center. Comparison between analytical and experimental results revealed discrepancy between calculated and measured characteristics, which could be attributed to the deviation of the actual shape of the bending element from that employed in the model.
single crystal Cu-Al-Ni alloy; bending force element
https://mpm.spbstu.ru/article/2016.51.8/
MPM229_08_nikolaev.pdf
RAR
RUS
166-171
0000-0003-4205-3226
Ioffe Institute
Guzilova
L.I.
St.Petersburg, Russia
Institute of Problems of Mechanical Engineering RAS
Grashchenko
St.Petersburg, Russia
Ioffe Institute
Pechnikov
St.Petersburg, Russia
Ioffe Institute
Maslov
St.Petersburg, Russia
Volgograd State Technical University
Zav'yalov
Volgograd, Russian Federation
Volgograd State Technical University
Abdrachmanov
Volgograd, Russian Federation
F-1445-2014
7202768874
0000-0003-3738-408X
ITMO University
Romanov
Alexey
alexey.romanov@niuitmo.ru
St.Petersburg, Russia
Ioffe Institute
Nikolaev
St.Petersburg, Russia
Study of β-Ga2O3 epitaxial layers and single crystals by nanoindentation technique
This paper describes the determination of the hardness and the Young's modulus of β-Ga2O3 single crystals and epitaxial layers by nanoindentation technique. The measurements were performed on (100) plane of β-Ga2O3 single crystals produced by free crystallisation method and on (-311) and (-201) planes of β-Ga2O3 epitaxial layers grown on m- and c-oriented sapphire substrates by halide vapour phase epitaxy. The analysis of the experimental data was performed using Oliver-Pharr method. Theoretical values of Young.s modulus were calculated by density functional theory. The value of the Young's modulus of 234 GPa was measured for (100) β-Ga2O3 single crystals. The hardness and the Young's modulus for β-Ga2O3 epitaxial layers, were 12.5 GPa and 225 GPa for (-201) plane and 17 GPa and 300 GPa for (-311) plane, respectively.
nanoindentation technique; β-Ga2O3 single crystals; β-Ga2O3 epitaxial layers
https://mpm.spbstu.ru/article/2016.51.9/
MPM229_09_guzilova.pdf
RAR
RUS
172-179
ITMO University
Rozhkova
St.Petersburg, Russia
Togliatti State University
Sosnin
Togliatti, Russia
Peter the Great St. Petersburg Polytechnic University
Orlov
St.Petersburg, Russia
Peter the Great St. Petersburg Polytechnic University
Sankova
St.Petersburg, Russia
Peter the Great St. Petersburg Polytechnic University
Ilyechova
St.Petersburg, Russia
Togliatti State University
M.R. Shafeev
Togliatti, Russia
Peter the Great St. Petersburg Polytechnic University
Puchkova
St.Petersburg, Russia
F-1445-2014
7202768874
0000-0003-3738-408X
ITMO University
Romanov
Alexey
alexey.romanov@niuitmo.ru
St.Petersburg, Russia
An intervention of silver from nanoparticles in murine copper turnover
Silver nanoparticles (SNP) were fabricated by method of chemical reduction of silver ions to Ag(0) in aqueous solution in the presence of surfactant micelles. Hydrazine hydrate was used as a reducing agent. Solution of SNP had brown-yellow color; median linear size of SNP was approximately 35 nm: and they showed absorption maximum at 420 nm. Toxicity of the SNP was tested in E. coli K802 cells. The particles displayed antimicrobial activity. Effect of SNP on mammalian copper metabolism was tested in mice. Atomic silver was found in blood serum, it was taken up by hepatocytes, inserted to active centers of ceruloplasmin, secreted to blood, and excreted through bile and urine. After cancellation of the SNP injections, silver concentration decreased in extracellular fluids. It is likely that SNP were corroded to form Ag(I), which integrated to copper turnover. The effects of silver intervention in copper metabolism of mammals as well as using SNP to trace copper transfer are discussed.
silver nanoparticles
antibacterial activity
nanoparticle silver intervention in copper turnover
silver turnover through body
https://mpm.spbstu.ru/article/2016.51.10/
MPM229_10_rozhkova.pdf