Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques最新文献_第10页

Stretchable Pixel-Array Light-Emitting Diode Based on Single-Walled Carbon Nanotubes for Flexible Electronics 柔性电子中基于单壁碳纳米管的可拉伸像素阵列发光二极管

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Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques Pub Date : 2025-06-25 DOI: 10.1134/S1027451025700132

D. E. Kolesina, F. M. Kochetkov, A. A. Vorobyov, K. N. Novikova, A. S. Goltaev, V. V. Neplokh, I. S. Mukhin

引用次数: 0

Changes in the Spectral Characteristics of Some Polymeric Materials in the Frequency Range from 0.2 to 2 THz as a Result of Exposure to a Megawatt Flux of Submillimeter Radiation of Microsecond Duration 某些聚合物材料在0.2至2太赫兹频率范围内暴露于微秒持续时间的兆瓦亚毫米辐射通量时光谱特性的变化

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Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques Pub Date : 2025-06-25 DOI: 10.1134/S1027451025700181

A. V. Arzhannikov, S. L. Sinitsky, D. A. Samtsov, P. V. Kalinin, S. A. Kuznetsov, V. D. Stepanov, S. S. Popov, E. S. Sandalov, M. G. Atlukhanov, A. V. Stankevich, A. V. Pestov, N. A. Nikolaev, A. A. Rybak

{"title":"Changes in the Spectral Characteristics of Some Polymeric Materials in the Frequency Range from 0.2 to 2 THz as a Result of Exposure to a Megawatt Flux of Submillimeter Radiation of Microsecond Duration","authors":"A. V. Arzhannikov, S. L. Sinitsky, D. A. Samtsov, P. V. Kalinin, S. A. Kuznetsov, V. D. Stepanov, S. S. Popov, E. S. Sandalov, M. G. Atlukhanov, A. V. Stankevich, A. V. Pestov, N. A. Nikolaev, A. A. Rybak","doi":"10.1134/S1027451025700181","DOIUrl":"10.1134/S1027451025700181","url":null,"abstract":"The effect of exposure to pulsed megawatt submillimeter (0.1–0.4 THz) radiation fluxes on the spectral characteristics of some thin-film polymer materials in the frequency range from 0.2 to 2 THz has been registered. The polymer samples were characterized using technical solutions within the framework of time-domain spectroscopy and BWO spectroscopy. For the exposure, a radiation flux in the submillimeter wavelength range with a duration of about 4 μs, generated during beam–plasma interaction at the GOL–PET facility (Budker Institute of Nuclear Physics SB RAS), was used. Relative changes in the real part of the permittivity of individual polyvinylidene fluoride samples were found to reach a level of 0.5 with an initial value of about 3.0, while for polyvinyl chloride samples, no changes in this parameter were registered. At the same time, for individual polyurea samples, both significant and negligible changes in this parameter were observed as a result of the exposure. The results of the experiments provide a basis for using thin-film polymer materials as substrates for supramolecular complex samples, which during research will be exposed to powerful pulsed radiation fluxes in the submillimeter wavelength range.","PeriodicalId":671,"journal":{"name":"Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques","volume":"19 1","pages":"115 - 121"},"PeriodicalIF":0.4,"publicationDate":"2025-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145144637","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Influence of Surface on the Development and Dynamics of Droplet Coalescence in Optical Cells at the Isotropic Liquid–Liquid Crystal Phase Transition 各向同性液-液晶相变时，表面对光学电池中液滴聚结发展及动力学的影响

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Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques Pub Date : 2025-06-25 DOI: 10.1134/S1027451025700028

P. V. Dolganov, N. A. Spiridenko, V. K. Dolganov

{"title":"Influence of Surface on the Development and Dynamics of Droplet Coalescence in Optical Cells at the Isotropic Liquid–Liquid Crystal Phase Transition","authors":"P. V. Dolganov, N. A. Spiridenko, V. K. Dolganov","doi":"10.1134/S1027451025700028","DOIUrl":"10.1134/S1027451025700028","url":null,"abstract":"The work presents results of studies of coalescence of nematic liquid crystal droplets surrounded by isotropic liquid. With the aid of high-resolution optical microscopy and high-speed video recording the coalescence of droplets in thin optical cells has been studied. Cells with planar and homeotropic boundary conditions for the liquid crystal director were used. It is shown that depending on boundary conditions at the cell surface the coalescence process at the initial stage develops in a different manner. In a cell with planar boundary conditions, the linear dependence of the width of the neck between droplets on time is observed at the initial stage. At subsequent stages, the influence of surface leads to slower dynamics. The final stage of coalescence is characterized by exponential relaxation of the droplet to the equilibrium shape. At the coalescence of droplets whose diameter exceeds the cell thickness, an intermediate stage with the power-law dependence of the neck width on time is observed. The duration of this stage increases with increasing the droplet size. Capillary velocity and characteristic times at different stages of coalescence were determined. Characteristic times for the initial stage increase linearly with increasing the droplet size. For the middle stage the characteristic times increase proportionally to the third power of the droplet radius.","PeriodicalId":671,"journal":{"name":"Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques","volume":"19 1","pages":"8 - 13"},"PeriodicalIF":0.4,"publicationDate":"2025-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145144689","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of Grain Size and Texture of Polycrystalline Tungsten on Its Ion-Beam Sputtering 晶粒尺寸和织构对多晶钨离子束溅射的影响

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Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques Pub Date : 2025-06-25 DOI: 10.1134/S1027451025700284

R. Kh. Khisamov, N. N. Andrianova, A. M. Borisov, M. A. Ovchinnikov, R. R. Mulyukov

引用次数: 0

Dependence of the Charge State of Ions of a Periodic System of Elements on the Velocity of Charged Particles 元素周期系统中离子的电荷态与带电粒子速度的关系

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Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques Pub Date : 2025-06-25 DOI: 10.1134/S1027451025700260

N. N. Mikheev, I. Zh. Bezbakh

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Estimation of Porosity of Microarc Oxide Coating Based on Optical Image Recognition 基于光学图像识别的氧化微弧涂层孔隙率估计

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Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques Pub Date : 2025-06-25 DOI: 10.1134/S1027451025700120

E. A. Pecherskaya, A. A. Maksov, S. V. Konovalov, P. E. Golubkov, M. A. Mitrohin, S. A. Gurin, M. D. Novichkov

{"title":"Estimation of Porosity of Microarc Oxide Coating Based on Optical Image Recognition","authors":"E. A. Pecherskaya, A. A. Maksov, S. V. Konovalov, P. E. Golubkov, M. A. Mitrohin, S. A. Gurin, M. D. Novichkov","doi":"10.1134/S1027451025700120","DOIUrl":"10.1134/S1027451025700120","url":null,"abstract":"The work is aimed at solving the problem of improving the quality control of coatings with a porous structure. The problem arises due to the lack of an effective and nondestructive method for assessing the porosity of microarc oxide coatings. Accurate porosity control is necessary to ensure the reliability and durability of coatings, as well as to prevent their defects. The use of optical image recognition techniques can improve the process of indirect measurement of coating porosity and improve the quality of control without affecting the object. The factors affecting the porosity of the microarc oxide coating, as well as methods for its determination, are systematized. A method for estimating the porosity of oxide coatings of AD31 aluminum alloy samples based on a recognition program written in the MATLAB R2020a environment is proposed as well as the surface morphology images using modern microscopy methods. A statistical analysis of the surface morphology was carried out, which confirmed good agreement between the porosity estimate and the data obtained during image processing using scanning electron microscope software. The relative error of the proposed method does not exceed 10%. The scientific novelty of the work consists in the development of algorithms for a unique nondestructive testing method, recognition of porous structures based on optical data, which contribute to increasing the efficiency of porosity estimation and improving the characteristics of oxide coatings.","PeriodicalId":671,"journal":{"name":"Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques","volume":"19 1","pages":"73 - 78"},"PeriodicalIF":0.4,"publicationDate":"2025-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145144634","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Study of Structural Stability of Thin Films of CH3NH3PbI3 Hybrid Perovskite under Ambient Conditions 环境条件下CH3NH3PbI3杂化钙钛矿薄膜结构稳定性研究

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Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques Pub Date : 2025-06-25 DOI: 10.1134/S102745102570003X

T. Yu. Zelenyak, A. S. Doroshkevich, V. V. Kriger, T. N. Vershinina, T. V. Tropin, M. V. Avdeev

引用次数: 0

Magnetoelectric Properties of Cylindrical Ferromagnetic Particles 圆柱形铁磁粒子的磁电特性

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Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques Pub Date : 2025-06-25 DOI: 10.1134/S1027451025700107

T. S. Shaposhnikova, R. F. Mamin

{"title":"Magnetoelectric Properties of Cylindrical Ferromagnetic Particles","authors":"T. S. Shaposhnikova, R. F. Mamin","doi":"10.1134/S1027451025700107","DOIUrl":"10.1134/S1027451025700107","url":null,"abstract":"Within the framework of the phenomenological approach, the emergence of an inhomogeneous magnetic state and the associated appearance of inhomogeneous electric polarization in the volume of small magnetic particles have been studied. The microscopic mechanism of this relation between magnetization and polarization is due to spin-orbit interaction. The specific form of magnetization and polarization is determined by the shape and size of cylindrical particles. Using the free energy expression for magnetization, a nonuniform distribution of magnetization in the form of three-dimensional magnetic vortices is obtained. A vortex state appears only for cylinders with a radius greater than a certain critical value, while for particles with a smaller radius, a uniform magnetic state arises. In the vortex state, nonuniform electric polarization emerges. The local polarization vectors have the form of rays directed towards the cylinder axis. The region of existence of such inhomogeneous states has been determined. A change in the local electric polarization of small magnetic particles in an external magnetic field is considered. An expression for the magnetoelectric susceptibility is obtained.","PeriodicalId":671,"journal":{"name":"Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques","volume":"19 1","pages":"61 - 65"},"PeriodicalIF":0.4,"publicationDate":"2025-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145144846","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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The Effect of Silicon in an Aluminum Alloy on the Composition and Structure of Coatings Formed by Microarc Oxidation 铝合金中硅对微弧氧化镀层组成和组织的影响

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Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques Pub Date : 2025-06-25 DOI: 10.1134/S1027451025700351

N. Yu. Dudareva, V. M. Sitdikov

{"title":"The Effect of Silicon in an Aluminum Alloy on the Composition and Structure of Coatings Formed by Microarc Oxidation","authors":"N. Yu. Dudareva, V. M. Sitdikov","doi":"10.1134/S1027451025700351","DOIUrl":"10.1134/S1027451025700351","url":null,"abstract":"The paper considers the effect of silicon in aluminum alloys on the structure, phase composition, and properties of coatings obtained by microarc oxidation. The research was carried out on samples made of eutectic aluminum alloy AK12ph (∼12% Si) and foreign hypereutectic aluminum alloy M244 (∼26% Si). The coatings were formed by microarc oxidation in a silicate-alkali electrolyte on a capacitive installation in the same technological mode for all samples. The thickness, porosity, phase composition, and crystallite sizes were determined for the formed coatings. Experimental dataset showed that silicon in an aluminum alloy contributes to the formation of coatings with greater thickness and high porosity. The coating thickness on the M244 alloy is ∼273 μm, which is 1.43 times greater than that of the coating on the AK12ph alloy. The macroporosity of the coatings on the M244 alloy is also high (∼29%), which is 4.8 times higher than that of the coating on the AK12ph alloy. The proportion of nanoscale pores with a diameter of less than 100 nm was determined from the high-magnification photograph of coating sections. The coating on the M244 alloy has a sufficiently high nanoscale porosity of 15.3%, which is 2.6 times higher than on the AK12ph alloy. X-ray phase analysis showed that silicon in an aluminum alloy increases the proportion of aluminosilicates (mullite and sillimanite) in the coating, the amounts of which in the coating on the M244 alloy reaches 76%, which is 1.3 times more than that of the coating on the AK12ph alloy. Aluminosilicate phases contribute to reducing the microhardness of the coatings. The results of this study demonstrate the possibility of controlling the structure and properties of coatings by changing the chemical composition of aluminum alloys subjected to microarc oxidation.","PeriodicalId":671,"journal":{"name":"Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques","volume":"19 1","pages":"256 - 265"},"PeriodicalIF":0.4,"publicationDate":"2025-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145145079","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Electrostatic Discharges during the Joint Impact of Electrons and Electromagnetic Radiation on Glass K-208 电子与电磁辐射共同作用下K-208玻璃的静电放电

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Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques Pub Date : 2025-06-25 DOI: 10.1134/S1027451025700247

R. Kh. Khasanshin, L. S. Novikov, D. V. Uvarov

{"title":"Electrostatic Discharges during the Joint Impact of Electrons and Electromagnetic Radiation on Glass K-208","authors":"R. Kh. Khasanshin, L. S. Novikov, D. V. Uvarov","doi":"10.1134/S1027451025700247","DOIUrl":"10.1134/S1027451025700247","url":null,"abstract":"Electrostatic discharges and radiation-stimulated leakage currents were studied under separate and combined action of 10–40 keV electrons and solar electromagnetic radiation on K-208 glass samples used as cover glass for solar batteries and reflective elements for spacecraft thermal radiators. The values of the electron flux density (φ) were changed in the range of (5 × 108–1 × 1011) cm–2 s–1, and the electromagnetic radiation flux corresponded to one equivalent of solar illumination. Irradiation was carried out in a vacuum of 10–4 Pa. During irradiation, there were two types of discharges: the first type is a discharge from a cone-shaped microprotrusion on the glass surface into the surrounding ionized medium, and the second type of discharge developed along the irradiated surface leaving about 100 nm wide and up to 2 nm deep discharge channels on it. Discharges of both types were accompanied by plasma emissions and generation of electromagnetic pulses. The dependences of the discharge frequency and leakage currents on the parameter φ for electron and combined irradiation were obtained. It was found that for fixed electron energy, discharges of the second type on the samples surface in the case of combined irradiation occur at a lower φ value than that in the case of electron irradiation. It was also found that with combined action the share of breakdowns of cover glass samples on the conductive substrate in the events recorded in the experiments increases significantly. The share of breakdowns of glass samples also increases with increasing energy of the impacting electrons.","PeriodicalId":671,"journal":{"name":"Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques","volume":"19 1","pages":"157 - 162"},"PeriodicalIF":0.4,"publicationDate":"2025-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145144642","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0