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2021 IEEE 11th International Conference Nanomaterials: Applications & Properties (NAP)最新文献

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Composition and Structure of Meningioma Psammoma Bodies 脑膜瘤沙粒体的组成和结构
Pub Date : 2021-09-05 DOI: 10.1109/NAP51885.2021.9568556
A. Denysenko, A. Piddubnyi, Yevgen Kuzenko, O. Pylypenko, R. Moskalenko
This paper is devoted to the microstructure, morphology, and elemental composition of pathological minerals in dural-based neoplasms. It was found that pathological crystallin inclusions in meningiomas are represented by calcium apatite.
本文对硬脑膜肿瘤病理矿物的显微结构、形态和元素组成进行了研究。发现脑膜瘤的病理性结晶蛋白包涵体以磷灰石钙为代表。
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引用次数: 0
F- and P-enriched Coatings for Mg Implants by Low Energy PEO Process 低能PEO法制备富F、富p镁植入物涂层
Pub Date : 2021-09-05 DOI: 10.1109/NAP51885.2021.9568602
Y. Husak, O. Oleshko, J. Michalska, V. Korniienko, O. Solodovnyk, Bohdan Dryhval
Degradable implants occupy the significant position in orthopedic industry. Magnesium is an appropriate degradable material due to its good biocompatibility and degradability properties in addition to advantageous mechanical properties. Improving the material quality, especially corrosion resistance and surface active, could be occur through the chemicals and parameters of the Plasma Electrolytic Oxidation process. Voltage reduction could reduce cost involved and make more environmentally friendly. Doubling the concentration of the sodium phosphate worked at low voltage. The surface morphology showed well-developed structure. Obtained coatings were without cracks and with good thickness size. Increasing wettability point to enhancing bioactive properties.
可降解植入物在骨科行业中占有重要地位。镁除具有良好的力学性能外,还具有良好的生物相容性和可降解性,是一种合适的可降解材料。通过等离子体电解氧化工艺的化学成分和参数,可以提高材料的质量,特别是耐腐蚀性和表面活性。降低电压可以降低成本,使产品更加环保。磷酸钠的浓度加倍在低电压下起作用。表面形貌结构发达。所得涂层无裂纹,厚度尺寸好。增加润湿性是为了提高生物活性。
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引用次数: 0
Nickel Ferrites Nanopowders as Catalysts for Hydrogen Production through NaBH4 Hydrolysis 纳米铁氧体镍粉作为NaBH4水解制氢催化剂的研究
Pub Date : 2021-09-05 DOI: 10.1109/NAP51885.2021.9568586
I. Ivanenko, S.M. Lesik
the two series of ferrites were synthesized. The first series was obtained by the traditional method of coprecipitation. The second series was synthesized by the new improved method which was named the coprecipitation with overheating. FTIR spectra had shown the tetrahedral and octahedral metals ions sites, and the XRD pattern confirmed the formation of cube structure with the stable lattice constant of ferrites in obtained nanopowders. The high catalytic activity of all synthesized nanoferrite catalysts in the sodium borohydride hydrolysis reaction was proved. But Nickel ferrites synthesized by a new method of coprecipitation with overheating showed significantly higher catalytic activity in the studied process of hydrogen production. The possibility of nickel ferrite nanopowders using for hydrogen production by hydrolysis of sodium borohydride has been shown and confirmed.
合成了这两个系列的铁氧体。第一个系列是用传统的共沉淀法得到的。第二系采用改进后的方法合成,命名为过热共沉淀法。FTIR光谱显示了金属离子的四面体和八面体位置,XRD谱图证实了制备的纳米粉体具有稳定的铁氧体晶格常数,形成了立方体结构。结果表明,合成的纳米铁氧体催化剂在硼氢化钠水解反应中具有较高的催化活性。而采用过热共沉淀法合成的镍铁氧体在制氢过程中表现出更高的催化活性。研究证实了纳米铁氧体镍粉用于硼氢化钠水解制氢的可能性。
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引用次数: 0
The Influence of Laser Irradiation on the Formation of n-n+ Transitions in Heterosystems with Significant Mismatch of Lattice Parameters 激光辐照对晶格参数不匹配的异质体系中n-n+跃迁形成的影响
Pub Date : 2021-09-05 DOI: 10.1109/NAP51885.2021.9568583
O. Dan’kiv, O. Kuzyk, I. Stolyarchuk
The theory of the formation of n-n+ transitions in three-layer heterosystems with significant mismatch of lattice parameters of contacting materials exposed to intense laser or radiation irradiation is developed. Within the framework of the developed model, the concentration of conduction electrons was calculated. It is established that the concentration profile of conduction electrons depends on the average concentration of dot defects, the mismatch parameter and the geometric size of the heterostructure.
提出了接触材料在强激光或强辐射照射下晶格参数明显不匹配的三层异质体系中n-n+跃迁形成的理论。在建立的模型框架内,计算了传导电子的浓度。建立了导电电子的浓度分布取决于点缺陷的平均浓度、失配参数和异质结构的几何尺寸。
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引用次数: 0
Growth Kinetics of CVD Diamond Films Deposited in Glow Discharge Plasma Using a Pulsed Power Supply 脉冲电源在辉光放电等离子体中沉积CVD金刚石膜的生长动力学
Pub Date : 2021-09-05 DOI: 10.1109/NAP51885.2021.9568611
K. Koshevoy, Yu.Ya. Volkov, E. Reshetnyak, V. Strel’nitskij
The influence of the parameters of a pulsed power supply of a glow discharge and the substrate temperature on the growth kinetics of CVD polycrystalline diamond films have been studied. It was found that an increase in the pulse frequency from 13 to 50 kHz and a decrease in the pulse duty cycle from 90 to 80% promotes an increase in the films growth rate by 1.5 – 2 times. The non-monotonous character of the dependence of the film growth rate on the deposition temperature upon pulsed excitation of a glow discharge is similar to that characteristic by direct current. In the optimal pulse mode the maximum film growth rate is near a temperature of 1050°C. With an increase in the deposition time, an increase in the average growth rate of the diamond film is observed. When the synthesis process lasts more than 6 hours, the deposition rate reaches 11 μm / hour. The power consumption in the pulsed mode of diamond films synthesis is 0.3 kW / μm, which is 3 times lower than when using a DC power source.
研究了辉光放电脉冲电源参数和衬底温度对CVD多晶金刚石薄膜生长动力学的影响。结果表明,将脉冲频率从13 kHz提高到50 kHz,将脉冲占空比从90%降低到80%,可使薄膜的生长速率提高1.5 ~ 2倍。在辉光放电的脉冲激励下,薄膜生长速率对沉积温度的依赖性的非单调性与直流电的特性相似。在最佳脉冲模式下,薄膜的最大生长速率在1050℃附近。随着沉积时间的延长,金刚石膜的平均生长速率增大。当合成过程持续6小时以上时,沉积速率达到11 μm /小时。脉冲方式合成金刚石薄膜的功耗为0.3 kW / μm,比使用直流电源时低3倍。
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引用次数: 0
Influence of Shell’s Organic Components on the Structure and Characteristics of Nanopores in Organic-Mineral Fertilizers 壳类有机组分对有机无机肥料纳米孔结构及特性的影响
Pub Date : 2021-09-05 DOI: 10.1109/NAP51885.2021.9568553
A. Yanovska, S. Vakal, V. Vakal, V. Shkola, Tatiana Dychenko, A. Artyukhov
At this work the influence of biochar component addition to the shell surface on the characteristics of nanopores in the organic-mineral fertilizers. The nanoporous organic shell has good strength properties and is reliable attached to the core of the granule. The presence of biochar in the organic shell makes it possible to create a developed nanoporous structure due to a high specific surface area. The size and shape of nanopores allows for uniform penetration of moisture into the shell for its dissolution with subsequent introduction into the soil.
本文研究了在有机无机肥料壳表面添加生物炭组分对其纳米孔特性的影响。纳米多孔有机壳具有良好的强度性能,可可靠地附着在颗粒核上。生物炭在有机壳中的存在,由于具有较高的比表面积,使得创建发达的纳米孔结构成为可能。纳米孔的大小和形状允许水分均匀地渗透到外壳中,随后将其溶解到土壤中。
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引用次数: 3
Identifying Magnetic Phases in Additively Manufactured High-Entropy Alloy FeCoNiAlxMnx 增材制造高熵合金FeCoNiAlxMnx的磁相识别
Pub Date : 2021-09-05 DOI: 10.1109/NAP51885.2021.9568591
Aleksander Larsen, A. Poulia, A. Azar, C. Bazioti, P. Carvalho, A. Gunnæs, B. Belle, S. Diplas, P. Mikheenko
High-Entropy Alloys are advanced technological materials composed of several (typically five) elements in nearly equal atomic concentration. By forming these alloys, previously unknown phase fields of multidimensional phase diagrams are explored. The large number of possible substitutions of constituent elements on crystal lattice sites justifies the dominant contribution of mixing entropy over enthalpy to the free energy reduction. This leads to the formation of phases, which otherwise could not be formed in alloys with fewer main alloying elements. Here we explore magnetic and compositional properties of a High-Entropy Alloy, namely FeCoNiAlx Mnx (0.05 ≤ x ≤ 3.08), composed of magnetic (Fe, Co, Ni) and non-magnetic elements (Al, Mn). By magnetic force microscopy of a selected area, it is observed that for intermediate to low Al and Mn contents, the alloy splits in two major crystallographic phases with different magnetic properties. Elemental maps of the same area were recorded with energy dispersive spectroscopy and scanning electron microscopy. Counterintuitively, it was found that the phase rich in non-magnetic Al has stronger magnetism than the phase rich in Fe. This work showcases possible applications of the here presented HEAs as soft magnetic materials in functional magnetic elements.
高熵合金是由原子浓度几乎相等的几种(通常是五种)元素组成的先进技术材料。通过形成这些合金,探索了以前未知的多维相图相场。晶格位置上大量可能的组成元素取代证明了混合熵比焓对自由能降低的主要贡献。这导致相的形成,否则在主要合金元素较少的合金中不可能形成相。本文研究了一种由磁性元素(Fe, Co, Ni)和非磁性元素(Al, Mn)组成的高熵合金FeCoNiAlx Mnx(0.05≤x≤3.08)的磁性和成分性能。通过选定区域的磁力显微镜观察,在中低Al和Mn含量的情况下,合金分裂为两个主要的具有不同磁性能的晶相。用能量色散光谱和扫描电镜记录了同一区域的元素图。与直觉相反,发现富非磁性Al的相比富Fe的相具有更强的磁性。本工作展示了HEAs作为软磁材料在功能磁性元件中的可能应用。
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引用次数: 1
Influence of Doping with Silver on Photocatalytic Properties of Tin Dioxide 银掺杂对二氧化锡光催化性能的影响
Pub Date : 2021-09-05 DOI: 10.1109/NAP51885.2021.9568598
M. Samsonenko, S. Khalameida, V. Sydorchuk, O. Khyzhun, V. Starchevskyy, B. Charmas
Mechano- and sonochemical doping of precipitated SnO2 with silver have been studied. All obtained samples have been investigated using XRD, SEM and EDS, XPS, adsorption of nitrogen, TEM, UV-Vis spectroscopy. The doped samples have a developed porous structure, narrower band gap and stronger absorption of visible light and, as a consequence, high photocatalytic activity in the photodegradation of rhodamine B, safranin T and methyl orange under the action of visible light.
研究了沉淀氧化锡与银的机械化学和声化学掺杂。采用XRD、SEM、EDS、XPS、吸附氮、TEM、UV-Vis光谱对所得样品进行了表征。掺杂样品具有发达的多孔结构、更窄的带隙和更强的可见光吸收,因此在可见光作用下光降解罗丹明B、红花红T和甲基橙具有较高的光催化活性。
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引用次数: 0
Magnetic Properties of GaSb Quantum Dots Include Spin-Orbit Interaction GaSb量子点的磁性包括自旋轨道相互作用
Pub Date : 2021-09-05 DOI: 10.1109/NAP51885.2021.9568519
O. Bauzha, S. Zagorodnyuk, B. Sus', Yuri Len
Quantitative numerical calculations of the effect of spin-orbit interaction on the magnetization and magnetic susceptibility of electrons to low-dimensional quantum dots were presented. The obtained characteristics demonstrate the irregular behavior in the region of ultralow temperatures. It is shown that the magnetization restraints at small magnetic fields are associated with the intersection of the energy levels of electrons, as a result of spin-orbit interaction. The calculations performed for GaSb quantum dots demonstrate the transformation of diamagnetic properties into paramagnetic ones, as well as the smoothing of the characteristics of magnetization and magnetic susceptibility with increasing temperature.
给出了自旋轨道相互作用对低维量子点磁化率和磁化率影响的定量数值计算。得到的特征表明,在超低温区域,合金具有不规则的行为。结果表明,由于自旋轨道相互作用,小磁场下的磁化约束与电子能级的交点有关。对GaSb量子点的计算表明,其抗磁性向顺磁性转变,磁化率和磁化率随温度的升高而趋于平滑。
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引用次数: 0
Biomedical Applications of Nanodiamonds and Nanotoxicity Problems 纳米金刚石的生物医学应用和纳米毒性问题
Pub Date : 2021-09-05 DOI: 10.1109/NAP51885.2021.9568571
L. Batyuk, N. Kizilova, Oksana Muraveinik
Nanodiamonds (NDs) attract much attention due to their unique chemical and physical properties, and numerous applications in medicine and biology. Nevertheless the problem of their invasion and accumulation in the cells, and mechanisms of their extraction from the organisms are not clear. In this paper a detailed review of literature on biotoxicity of NDs and their influence on cells and tissues is presented. It is shown, the effects are dose- and size-dependent, and depend on the administration type (puerperal, intratracheal, etc.). Besides, the opposite effects (both cytotoxic and non-toxic) have been observed on the same animals by different authors. Radio protective ability and cytotoxicity of the NDs with sizes 210 nm have been studied on rats with different type of administration with food of aqueous suspensions of NDs homogenized by ultrasound treatment followed by X-ray exposition (5.8g, 5 min). It was shown, administration of NDs produce no cytotoxic influence. Radioprotective influence of NDs have also been confirmed.
纳米金刚石因其独特的化学和物理性质,在医学和生物学上有着广泛的应用,备受关注。然而,它们在细胞内的侵入和积累问题以及从生物体中提取它们的机制尚不清楚。本文对NDs的生物毒性及其对细胞和组织的影响进行了综述。结果表明,影响是剂量和大小依赖的,并取决于给药类型(产褥期、气管内等)。此外,不同的作者在同一动物身上观察到相反的作用(细胞毒性和无毒)。用不同给药方式的大鼠研究了粒径为210 nm的NDs的放射保护能力和细胞毒性,这些NDs的水悬浮液经超声处理均匀后,x射线照射(5.8g, 5 min)。结果表明,服用NDs不产生细胞毒性影响。NDs的辐射防护作用也已得到证实。
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引用次数: 0
期刊
2021 IEEE 11th International Conference Nanomaterials: Applications & Properties (NAP)
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