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Formation of submicron relief structures on the surface of sapphire substrates 蓝宝石衬底表面亚微米浮雕结构的形成
IF 0.7 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-06-14 DOI: 10.15330/pcss.24.2.298-303
V. Petrov, A. Kryuchyn, I. Gorbov, A. Pankratova, D. Manko, Yu. O. Borodin, O. V. Shikhovets
An analysis of technologies that allow creating microrelief structures on the surface of sapphire substrates has been carried out. It is shown that the most effective method of forming relief structures with submicron dimensions is ion beam   etching through a protective mask formed by photolithography. The main problems in creating a microrelief on the surface of sapphire substrates are the removal of static electric charge in the process of ion beam  etching of the substrates, as well as obtaining a protective mask with windows of specified sizes, through which etching of the sapphire substrate is performed.
分析了在蓝宝石衬底表面产生微浮雕结构的技术。结果表明,形成亚微米级浮雕结构最有效的方法是通过光刻形成的保护掩膜进行离子束刻蚀。在蓝宝石衬底表面产生微浮雕的主要问题是在衬底离子束蚀刻过程中去除静电电荷,以及获得具有特定尺寸窗口的保护掩模,通过该掩模对蓝宝石衬底进行蚀刻。
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引用次数: 1
The features of chemo-mechanical activation technology of polymer composite materials production 化学机械活化技术在高分子复合材料生产中的特点
IF 0.7 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-06-14 DOI: 10.15330/pcss.24.2.304-311
O. Komashko, H. O. Sirenko, M. Skladaniuk
The paper deals with the study of the processes of obtaining polymer composites by chemo-mechanical activation technology (CMA-technology). The methods of research and testing of composite materials based on polytetrafluoroethylene (PTFE) and carbon fibers are analyzed and generalized. The influence of CMA technology on the structure and properties of PTFE composite was determined.
本文研究了化学机械活化技术(cma)制备高分子复合材料的工艺。对聚四氟乙烯(PTFE)与碳纤维复合材料的研究与测试方法进行了分析和概括。研究了CMA工艺对聚四氟乙烯复合材料结构和性能的影响。
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引用次数: 1
Frequency shifts of surface plasmon resonances in calculating the absorption coefficient of a composite based on bimetallic 1D-systems 计算双金属一维复合材料吸收系数时表面等离子体共振的频移
IF 0.7 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-06-11 DOI: 10.15330/pcss.24.2.290-297
A. O. Koval
In this paper analyzes the electromagnetic radiation absorption by a composite based on bimetallic nanowires. Using the Drude-Lorentz theory it was obtained the relationship for the polarizability frequency dependences, as well as real and imaginary parts of the dielectric function of layered 1D-systems was obtained. It is shown that the structure in the form of a metal core covered with a layer of another metal leads to splitting and the appearance of two maxima in the frequency dependence of the absorption coefficient. The magnitude and position of the maxima are determined by the composition of bimetallic nanowires and the volume content of metals. The influence of the dimensionality of the systems has been established by comparing the frequency dependences of the composite absorption coefficient based on bimetallic nanowires and nanoparticles. Calculations were performed for Ag@Au and Au@Ag nanowires immersed in Teflon.
本文分析了双金属纳米线复合材料对电磁辐射的吸收特性。利用德鲁德-洛伦兹理论,得到了层状一维系统的极化率频率依赖关系,以及介电函数的实部和虚部。结果表明,在吸收系数的频率依赖关系中,金属芯覆盖另一金属层的结构导致了分裂和两个最大值的出现。极值的大小和位置由双金属纳米线的组成和金属的体积含量决定。通过比较基于双金属纳米线和纳米颗粒的复合吸收系数的频率依赖性,确定了系统维度的影响。对浸在聚四氟乙烯中的Ag@Au和Au@Ag纳米线进行了计算。
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引用次数: 0
Development of high-precision hardware and software tools for automated determination of the characteristics of thermoelectric devices 开发用于热电器件特性自动测定的高精度硬件和软件工具
IF 0.7 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-06-11 DOI: 10.15330/pcss.24.2.278-283
B. Dzundza, O. Kostyuk, Z. Dashevsky, U. M. Pysklynets
In this work, a high-accuracy setup was developed for the characterization of thermoelectric devices in the temperature range of 300-900 K. The output parameters of the thermoelectric devices, including the thermoelectric efficiency Z, Seebeck coefficient S, and internal resistance r, were measured. A technique, block diagram, and computer tools for automated measurement and preliminary processing of experimental data were developed for automated studies of the properties of semiconductor materials and thermoelectric power conversion modules. The developed tools were shown to have high efficiency. The complexity of the process of measuring the main electrical parameters of semiconductor materials was significantly reduced, and the accuracy of the obtained results was increased.
在这项工作中,开发了一种在300-900 K温度范围内表征热电器件的高精度装置。测量了热电器件的输出参数,包括热电效率Z、塞贝克系数S和内阻r。为半导体材料和热电转换模块性质的自动化研究,开发了一种技术、框图和计算机工具,用于自动测量和实验数据的初步处理。所开发的工具具有很高的效率。该方法大大降低了半导体材料主要电参数测量过程的复杂性,提高了测量结果的准确性。
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引用次数: 0
Structural studies and magnetism of Dy6Ni2.43Sn0.5 stannide Dy6Ni2.43Sn0.5锡化物的结构和磁性研究
IF 0.7 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-06-11 DOI: 10.15330/pcss.24.2.284-289
L. Romaka, Kh. Miliyanchyk, V. Romaka, L. Havela, Y. Stadnyk
Intermetallic compound Dy6Ni2.43Sn0.5 was prepared by arc melting and annealing at 873 K. It was characterized by X-ray powder diffraction, differential thermal analysis, and electron probe microanalysis. The crystal structure of low temperature Dy6Ni2.43Sn0.5 phase belongs to the orthorhombic Ho6Co2Ga structure type (space group Immm, a = 0.93116(1) nm, b = 0.94993(1) nm, c = 0.98947(1) nm). Crystal structure refinements showed the deviation from the ideal 6:2:1 stoichiometry corresponding to the formula Dy6Ni2.43Sn0.5. It exhibits a sequence of magnetic phase transitions; antiferromagnetic ordering sets in at 60 K, while further order-order magnetic phase transitions take place at lower temperatures.
采用电弧熔化和873 K退火法制备了金属间化合物Dy6Ni2.43Sn0.5。通过x射线粉末衍射、差热分析和电子探针微量分析对其进行了表征。低温Dy6Ni2.43Sn0.5相的晶体结构属于正交Ho6Co2Ga结构类型(空间群Immm, a = 0.93116(1) nm, b = 0.94993(1) nm, c = 0.98947(1) nm)。晶体结构的改进表明,与公式Dy6Ni2.43Sn0.5所对应的理想6:2:1化学计量比存在偏差。它表现出一系列的磁相变;反铁磁有序在60k时形成,而进一步的有序磁相变在较低温度下发生。
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引用次数: 0
Quantum-chemical studies of the interaction of partially oxidized graphene-like planes with each other 部分氧化类石墨烯平面相互作用的量子化学研究
IF 0.7 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-06-04 DOI: 10.15330/pcss.24.2.269-277
Y. V. Hrebelna, E. Demianenko, M. Terets, Y. Sementsov, V. Lobanov, A. Grebenyuk, V. Kuts, S. Zhuravskyi, O. V. Khora, M. Kartel
Using the methods of quantum chemistry, the energy effects of the interaction of partially oxidized graphene-like planes with each other and the effect on this characteristic of the nature of the functional groups present in the oxidized graphene-like planes, as well as the dimensions of the graphene-like planes themselves, were clarified. It was established that the reaction between the hydroxyl and aldehyde groups of two interacting graphene-like planes is the most thermodynamically probable, regardless of the dimensions of the graphene-like planes. The reaction between two carboxyl groups of different graphene-like planes is the least thermodynamically probable. To create nanocomposites by interacting graphene-like planes with each other, it is necessary that the graphene-like planes contain hydroxyl and aldehyde groups.
利用量子化学的方法,阐明了部分氧化类石墨烯平面相互作用的能量效应,以及氧化类石墨烯平面中官能团的性质对这一特性的影响,以及类石墨烯平面本身的尺寸。结果表明,两个相互作用的类石墨烯平面的羟基和醛基团之间的反应是最可能的热力学反应,而与类石墨烯平面的尺寸无关。两个不同的类石墨烯平面的羧基之间的反应是热力学可能性最小的。为了通过类石墨烯平面相互作用来制造纳米复合材料,必须使类石墨烯平面含有羟基和醛基。
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引用次数: 0
Bacteria inactivation using spinel cobalt ferrite catalyst 尖晶石钴铁氧体催化剂灭活细菌
IF 0.7 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-05-14 DOI: 10.15330/pcss.24.2.256-261
N. Danyliuk, I. Lapchuk, T. Tatarchuk, R. Kutsyk, V. Mandzyuk
The E. coli inactivation using hydrogen peroxide (H2O2) and cobalt ferrite granulated catalyst was investigated in a fixed-bed flow reactor. CoFe2O4 catalyst was synthesized by the co-precipitation method, granulated, and annealed at 1150°C. X-ray diffraction analysis was used to identify the crystal structure of the catalyst. CoFe2O4 catalyst demonstrates good catalytic activity for bacteria inactivation in the presence of H2O2. An increase in the hydrogen peroxide concentration increases the inactivation efficiency. The reactor demonstrates the E. coli inactivation of 99.94% at the H2O2 hydrogen peroxide concentration of 15 mM and initial bacterial concentration of 6·103 CFU/L. The water disinfection using a fixed-bed reactor demonstrates the broad prospects for industrial use.
在固定床流动反应器中,研究了过氧化氢(H2O2)和钴铁氧体颗粒催化剂对大肠杆菌的灭活作用。采用共沉淀法合成CoFe2O4催化剂,制粒,1150℃退火。用x射线衍射分析鉴定了催化剂的晶体结构。CoFe2O4催化剂对H2O2存在下的细菌失活具有良好的催化活性。过氧化氢浓度的增加增加了失活效率。实验结果表明,在过氧化氢浓度为15 mM、初始细菌浓度为6·103 CFU/L时,大肠杆菌的灭活率为99.94%。采用固定床反应器进行水消毒具有广阔的工业应用前景。
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引用次数: 0
Physical properties of nanocrystaline PbS synthesized by electrolytic method 电解法制备纳米晶PbS的物理性质
IF 0.7 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-05-14 DOI: 10.15330/pcss.24.2.262-268
O. Kapush, N. Mazur, A. Lysytsya, M. Moroz, B. Nechyporuk, B. Rudyk, V. Dzhagan, M. Valakh, V. Yukhymchuk
The possibility of obtaining nanocrystaline lead sulfide by an electrolytic method using lead electrodes is demonstrated, and the influence of temperature on the synthesis process is investigated. Based on the results of X-ray diffraction studies, the chemical and phase composition of the obtained samples is determined, as well as the parameters of the unit cell of the crystals lattice. The size of the nanocrystallites and the magnitude of residual mechanical strain in them is determined using the methods of Debye-Scherrer and Williamson-Hall. The results of X-ray diffraction are in agreement with the results of the Raman scattering on phonons.
探讨了用铅电极电解法制备纳米硫化铅的可能性,并研究了温度对合成过程的影响。根据x射线衍射研究的结果,确定了所得样品的化学成分和物相组成,以及晶格单位胞的参数。采用Debye-Scherrer和Williamson-Hall方法测定了纳米晶的尺寸和残余力学应变的大小。x射线衍射结果与声子的拉曼散射结果一致。
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引用次数: 0
Fractal analysis of fractograms of aluminum alloys irradiated with high current electron beam 大电流电子束辐照铝合金断口形貌的分形分析
IF 0.7 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-04-30 DOI: 10.15330/pcss.24.2.249-255
S. Donets, V. Lytvynenko, O. Startsev, Y. Lonin, A. Ponomarev, V. Т. Uvarov
The aluminum alloys D16 and AMg6 were irradiated using the high-current relativistic electron beam in vacuum. Intense electron irradiation of the materials modified their physical properties. The fractal character of the fracture surfaces’ images was studied. The change of the fractality is a distinguished descriptor of the materials modification. The characteristic ductile and brittle fractures are accompanied by the change of the fractal dimension.
采用真空大电流相对论电子束辐照铝合金D16和AMg6。强电子辐照改变了材料的物理性能。研究了断口图像的分形特征。分形的变化是材料改性的一种独特描述。特征的韧性和脆性断裂伴随着分形维数的变化。
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引用次数: 1
Effect of the crystal structure and chemical bonding on the electronic and thermal transport in Cu2MeHf3S8 (Me – Mn, Fe, Co, Ni) thiospinels Cu2MeHf3S8 (Me - Mn, Fe, Co, Ni)硫尖晶石晶体结构和化学键对电子和热输运的影响
IF 0.7 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-04-11 DOI: 10.15330/pcss.24.2.235-243
O. Smitiukh, O. Soroka, O. Marchuk
Establishing the relationship between crystal structure and transport properties is an important issue that is directly connected with the applicability of functional materials. In this work, we present the analysis of the crystal structure, chemical bonding, and electronic and thermal transport properties of Cu2МеHf3S8 (Ме – Mn, Fe, Co, Ni) compounds. The increase of weighted mobility in the Mn → Fe → Со → Ni series as well as the change of the dominant scattering mechanism of charge carriers from scattering on point defects to the scattering on acoustic phonons explains the best electronic transport in Cu2NiHf3S8. Moreover, bonding inhomogeneity between the covalent δ(Co – S) and δ(Hf – S) from one side, and more ionic δ(Cu – S) interactions from the other side leads to low lattice thermal conductivity in Cu2MeHf3S8 (Me – Mn, Fe, Co, Ni) materials. The work also suggests the link between the occupation of the octahedral 16d site and the thermoelectric performance of the investigated thiospinels. Particularly, the best thermoelectric performance is observed in the case of the presence of two valence electrons in the d-level of atoms in octahedral voids, which can be essential for further enhancement of the thermoelectric performance in thiospinels.
建立晶体结构与输运性质之间的关系是一个直接关系到功能材料适用性的重要问题。在这项工作中,我们分析了Cu2МеHf3S8 (Ме - Mn, Fe, Co, Ni)化合物的晶体结构、化学键、电子和热输运性质。Mn→Fe→Со→Ni系列中加权迁移率的增加以及载流子的主要散射机制从点缺陷散射到声子散射的变化解释了Cu2NiHf3S8中最佳的电子输运。此外,在Cu2MeHf3S8 (Me - Mn, Fe, Co, Ni)材料中,一侧共价δ(Co - S)和δ(Hf - S)之间的键合不均匀性以及另一侧较多的离子δ(Cu - S)相互作用导致其晶格导热系数较低。这项工作还表明,占据八面体16d位点与所研究的硫尖晶石的热电性能之间存在联系。特别是,在八面体空洞中,当原子的d能级中存在两个价电子时,观察到最佳的热电性能,这对于进一步提高硫尖晶石的热电性能是必不可少的。
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引用次数: 0
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Physics and Chemistry of Solid State
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