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Periodically Spallated Ag Film as a High-Performing SERS Substrate for Biogenic Amines Detection

Bulletin of the Russian Academy of Sciences: Physics 2024年第Suppl 3期88卷 S299-S302页

作者： Pilnik, A.A. Borodaenko, Yu. M. Mitsai, E.V. Kuchmizhak, A.A. Institute of Automation and Control Processes Far Eastern Branch Russian Academy of Sciences Vladivostok690041 Russia

This study was focused on development of a rapid and sensitive method for detection of food spoilage marker histamine based on surface-enhanced raman spectroscopy (SERS) using quickly produced laser-textured Ag film as a SERS substrate. Optimization of fs-laser fabrication parameters has reduced the substrate fabrication time to less than a minute. Label-free SERS-detection of histamine adsorbed onto a spallated Ag surface over the concentration range of 10–6 to 10–10 M was demonstrated. The method addresses the need for large number of disposable SERS-substrates required in various biosensing applications. © Pleiades Publishing, Ltd. 2024.

关键词： Femtosecond lasers

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Model of Orthogonal Two-Wave Mixing in Optically Active Photorefractive Crystal of Cubic Symmetry

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Bulletin of the Russian Academy of Sciences: Physics 2024年第Suppl 4期88卷 S664-S669页

作者： Bezruk, M.N. Efimov, T.A. Storozhenko, D.V. Romashko, R.V. Institute of Automation and Control Processes Far Eastern Branch Russian Academy of Sciences Vladivostok690041 Russia

Abstract: We presented a complete physical model describing the process of two-wave vectorial mixing in optically active photorefractive crystals of cubic symmetry for an orthogonal interferometer scheme. Using the model, we calculated the two-wave interaction in a gyrotropic photorefractive crystal of bismuth titanate B12TiO20 at two wavelengths of 633 and 532 nm. Studies using the complete model showed that the full polarization independence mode is not achieved. It was found that it is possible to select the parameters of the crystal and interacting waves for the quasi-polarization independence mode, when signal changes caused by polarization instability of the signal wave are reduced to a minimum (no more than 6%). Based on the obtained results, it is recommended to choose a PRC with a high optical activity value for the implementation of polarization-independent interferometric schemes. © Pleiades Publishing, Ltd. 2024.

关键词： Photorefractive crystals

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2D Laser-Induced Periodic Surface Structures Formation on Thin Metal Films by Femtosecond Laser Radiation

2D Laser-Induced Periodic Surface Structures Formation on Th...

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2024 International Conference Laser Optics, ICLO 2024

作者： Bronnikov, K. Gladkikh, S. Mikerin, S. Terentiev, V. Simonov, V. Kuchmizhak, A. Dostovalov, A. Institute of Automation and Electrometry of the Sb Ras Novosibirsk Russia ITMO University Saint-Petersburg Russia Institute of Automation and Control Processes of the Feb Ras 5 Radio St. Vladivostok690041 Russia Far Eastern Federal University Pacific Quantum Center Vladivostok690041 Russia

D(grid and honeycomb) highly regular thermochemical laser-induced periodic surface structures (TLIPSS) were produced on Ti, Cr and Hf thin metal film (30100 nm) deposited on a glass substrate using femtosecond IR lase... 详细信息

ISBN: (纸本)9798350390674

关键词： Laser materials processing

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Prospects for the Development of Laser-Based Directed Energy Deposition Additive Process Based on AI Technologies

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Bulletin of the Russian Academy of Sciences: Physics 2024年第Suppl 3期88卷 S293-S298页

作者： Basakin, A.A. Kulchin, Y.N. Gribova, V.V. Timchenko, V.A. Zhevtun, I.G. Kudriashova, E.O. Nikitin, A.I. Institute of Automation and Control Processes Far Eastern Branch Russian Academy of Sciences Vladivostok690041 Russia

Abstract: Laser-based directed energy deposition process is one of the most promising processes for manufacturing, machining and repair of large-size metal parts of mechanical engineering. The complexity of controlling many changing parameters complicates its practical application. In the article the necessity of using intelligent decision support systems for process engineers of laser-based additive manufacturing is explained. The concept of an ensemble of ontological resources, which is implemented on the IACPaaS cloud platform and can be the basis of such systems, is described. The ensemble includes both a set of related ontologies and domain databases and knowledge bases. The peculiarity of the proposed solutions is that the ontology models are separated from the data and knowledge bases formed on their basis—the target information. Ontology in this approach provides an accurate description of structure, semantics, integrity constraints, as well as defines the rules of formation of target information and its interpretation. Also, one of the main differences from analogues is the explainability of the issued recommendations laid down in the designed decision support system. The developed models, methods and a set of software tools will eliminate some problems of application of additive technologies in industrial production processes, including reducing the requirements for the qualification of technological equipment users. © Pleiades Publishing, Ltd. 2024.

关键词： Application programs

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Calculation of Compositional Maps of Sea Surface Temperature from IR Measurements of US Satellites

Calculation of Compositional Maps of Sea Surface Temperature...

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2024 International Conference on Ocean Studies, ICOS 2024

作者： Aleksanina, Marina Dyakov, Sergey Ershova, Anastasia Far Eastern Branch The Russian Academy of Sciences Satellite Monitoring Laboratory of IACP FEB RAS Institute of Automation and Control Processes Vladivostok Russia Institute of Mathematics and Computer Technologies Far Eastern Federal University Vladivostok Russia

ISBN: (纸本)9798331532307

The work is devoted to approbation of a methodology for constructing and verifying composite maps of sea surface temperature (SST) with the preservation of thermal fronts. The equatorial part of the Northwestern Pacific Ocean region, characterized by weak temperature contrasts, significant clouds and high concentrations of water vapor, was chosen as the area for testing. Satellite and sub-satellite measurements were extracted from international databases. It is shown that the use of map provided by international databases based on a single satellite session requires additional cloud filtering. The developed composite maps are compared with their analogues. The advantage of the proposed approach is shown. A comparison of the temperatures of composite one-day maps and buoy measurements shows the accuracy of calculations within 0.6°C. The linear relationship has a slope coefficient close to one and a free term that does not exceed the accuracy of calculations. © 2024 IEEE.

关键词： Surface temperature

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Highly regular nanogratings formation on amorphous semiconductors films by femtosecond laser radiation 7

Highly regular nanogratings formation on amorphous semicondu...

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Advanced Laser Processing and Manufacturing VII 2023

作者： Dostovalov, Alexander Bronnikov, Kirill Gladkikh, Semyon Mitsai, Evgeny Zhizhchenko, Alexey Kuchmizhak, Aleksandr Institute of Automation and Electrometry Siberian Branch of RAS Novosibirsk630090 Russia Institute of Automation and Control Processes Far Eastern Branch of RAS Vladivostok690041 Russia Pacific Quantum Center Far Eastern Federal University Vladivostok Russia

ISBN: (纸本)9781510667730

We present the results of direct laser-induced periodic surface structuring of semiconductors thin films (a-Si, a-Ge) deposited on glass substrate at different ambient environments (air, vacuum, nitrogen) resulting in regular gratings with the period of 600-900 nm at the laser wavelength of 1026 nm oriented either along (a-Si) or transverse (a-Ge) to the linear laser polarization direction. The processing speed has a different effect on morphology of obtained structures: on a-Si film, an increase of scanning speed leads to the reorientation of gratings and reduction of their period, while on a- Ge, the uniformity degradation and increase of the period are observed. Changing the ambient atmosphere from air to nitrogen and vacuum, when writing structures on a-Ge, helps to minimize the uniformity degradation and obtain highly regular nanogratings. © 2023 SPIE.

关键词： Nitrogen

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Comparison of Structure, Transport Properties and Thermoelectric Power Efficiency of Thin CrSi and CoSi Films on Si(111) and Si(100) Substrates

Comparison of Structure, Transport Properties and Thermoelec...

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IEEE International Conference on Electrical Engineering and Photonics (EExPolytech)

作者： Dmitrii L. Goroshko Konstantin N. Galkin Evgenii. Yu. Subbotin Olga A. Goroshko Semen A. Balagan Andrey M. Maslov Igor M. Chernev Oleg V. Kropachev Dmitrii A. Khoroshilov Sergei A. Dotsenko Nikolay G. Galkin Optics and Electrophysics Laboratory Institute of Automation and Control Processes of FEB RAS Vladivostok Russia

ISBN: (数字)9798350388879

ISBN: (纸本)9798350388886

The paper compares the formation conditions, crystal structure, conductivity, and thermoelectric properties of thin CrSi and CoSi films on silicon substrates with (111) and (100) orientations. It is found that, despite the insufficiently good conductivity, the films have a noticeable Seebeck coefficient (up to 70 μV/K) in the temperature range of 200-450 K: positive for CrSi and negative for CoSi. The maximum power factor is estimated at 2 to 3 mW/(m2×K). For CoSi, first-principles calculations of the phonon structure and lattice thermal conductivity are performed, including in the form of nanowires. Estimates are made for the achievable dimensionless thermoelectric figure of merit of CoSi thin films: ZT=0.40–0.50 T=200-450 K.

关键词： Temperature distribution Reactive power Films Lattices Crystals Conductivity Thermal conductivity Silicon Nanowires Substrates

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Plumbene layer grown on Si(111)3×3−B and its restructuring by Mg adsorption

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Physical Review B 2025年第12期111卷 125401-125401页

作者： A. N. Mihalyuk L. V. Bondarenko A. Y. Tupchaya Y. E. Vekovshinin N. V. Denisov D. V. Gruznev A. V. Zotov A. A. Saranin Institute of Automation and Control Processes FEB RAS 690041 Vladivostok Russia Institute of High Technologies and Advanced Materials Far Eastern Federal University 690950 Vladivostok Russia

Using scanning tunneling microscopy observations, the Si(111)3×3−B surface was experimentally proved to be a suitable substrate for hosting high-buckled plumbene. Magnesium (Mg) adsorbed onto the grown plumbene intercalates between the Pb layer and Si(111)3×3−B substrate to form the Pb/Mg/Si(111):B atomic sandwich. Meanwhile, the Pb layer undergoes significant transformations: its original coverage of 2.0 monolayers (ML) reduces to 1.33 ML of Pb, as revealed via the density functional theory (DFT) ab initio random structure search analysis. The layer is arranged in a striped 3×1 structure, which, together with the substrate, adopts the overall 3×3 periodicity. DFT analysis of the band structures of the grown Pb layers revealed that they might possess unique electronic properties. However, the intrinsic properties of the layers appear to be overshadowed by the electronic properties of the real Si(111):B substrate, which underwent a strong subsurface p−type doping. The dominated contribution of the substrate bands to the electronic properties was confirmed in the in situ low-temperature transport measurements, which showed that the Si(111):B substrate with and without plumbene, as well as Pb/Mg/Si(111):B samples, display very similar conductivity values. The obtained results demonstrate that, while considering possible applications, the substrate hosting the prospective low-dimensional structures (e.g., two-dimensional Xenes) must meet not only the structural but also the electronic requirements.

关键词： Scanning tunneling microscopy

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Formation, Phonon Structure, Transport and Thermoelectric Properties of Multilayer Heterostructures Si/NC β-FeSi2/Si/ NC β-FeSi2/…/Si(111) and Si/NC α-FeSi2/Si/ NC α-FeSi2/…/Si(111)

Formation, Phonon Structure, Transport and Thermoelectric Pr...

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IEEE International Conference on Electrical Engineering and Photonics (EExPolytech)

作者： Konstantin N. Galkin Oleg V. Kropachev Olga A. Goroshko Evgenii. Yu. Subbotin Igor M. Chernev Dmitrii A. Khoroshilov Dmitrii L. Goroshko Nikolay G. Galkin Optics and Electrophysics Laboratory Institute of Automation and Control Processes of FEB RAS Vladivostok Russia

ISBN: (数字)9798350388879

ISBN: (纸本)9798350388886

Multilayer (4 and 8 layers) samples with embedded β-FeSi 2 and α-FeSi 2 nanocrystals (NCs) on silicon-on-insulator (SOI) substrates with (100) orientation and p-type conductivity have been grown. It has been established from Raman data that β-FeSi 2 NCs are formed with small portions of iron (0.5 nm) deposited at room temperature and annealed at T = 630°C with subsequent overgrowing with silicon, and α-FeSi 2 NCs are formed after short-term annealing at T = 1000°C and overgrowing with silicon. The effect of doping of intermediate silicon layers on the conductivity and Seebeck coefficient in multilayers (4 and 8) in the temperature range of 80–450 K was studied. It was shown that with maximum doping of intermediate layers (1019 cm -3 ) with the number of layers equal to 8, the maximum Seebeck coefficient 600 μV/K and the maximum power factor 2.5 mW/(m×K2) were observed at T= 450 K, which is due to the contribution of injected holes from β-FeSi 2 nanocrystals.

关键词： Resistance Reactive power Temperature distribution Annealing Nanocrystals Silicon-on-insulator Nonhomogeneous media Silicon Laser beams Substrates

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Mathematical Models and Algorithms of the Onboard Multiposition Integrated Inertial-Satellite Motion Detection System

Mathematical Models and Algorithms of the Onboard Multiposit...

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Saint Petersburg International Conference on Integrated Navigation Systems (ICINS)

作者： A. V. Shurygin Institute of Automation and Control Processes FEB RAS Vladivostok Russia

The report outlines the problems of assimilation of navigation information delivered by spaced on-board sensors for satellite positioning of a moving object (technological platform) combined with three-component specific force vector meters (3D newtonometers). The main mathematical constructions follow the "state–measurement" paradigm and are focused on solving the inverse problems of determining the movement of technological platform as a solid body. An ellipsoidal system and other coordinate systems that determine solutions are selected as the base coordinate system. Algorithms for calculating kinematic parameters and spatial orientation of technological platform, characteristics of motion causality - forces and moments are presented. A numerical solution to the problem of vector gravimetry is proposed. An original digital test stand of the system for assimilating integrated satellite and inertial navigation information has been developed.

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