Pub Date : 2021-09-05DOI: 10.1109/NAP51885.2021.9568505
H. Krüger, H. Cavers, O. Gronenberg, U. Schürmann, Y. Mishra, Jannick Jacobsen, J. Carstensen, N. Stock, L. Kienle, F. Schütt, R. Adelung, S. Hansen
In this study, double hierarchical and highly porous 3D carbon nanotube/sulfur (CNTT/S) composites were synthesized. By coating a ceramic template material with a simple and versatile infiltration process of an aqueous carbon nanotube (CNT) dispersion a self-organized CNT layer is formed. After removing the template material, a freestanding double hierarchical network is created that show excellent electrical conductivity of 6.02 S m-1 and a high specific BET surface area of 630 m2 with the presence of micro-, mesopores (up to 4 nm) and macropores (>>50 nm) simultaneously. A combined analysis of gas sorption measurements and elemental mapping using EFTEM after sulfur vapor deposition revealed that only the micro- and mesopores were accessible and that the sulfur is encapsulated within the double hierarchy. Hence, the electric percolation remains high without losing the necessary outer conductivity. Thereafter, these composites were employed in a proof-of-concept study as a sulfur cathode, demonstrating the importance of predesigning an electrode structure, shown in electrochemical performance data. With the aid of this hierarchical 3D composite structure, it is possible to achieve a stability over 100 cycles with $approx$ 5.8 mAh cm-1 as a sulfur cathode in lithium half-cell tests.
在本研究中，合成了双层、高多孔的三维碳纳米管/硫(CNTT/S)复合材料。通过在陶瓷模板材料上涂覆水碳纳米管(CNT)分散体的简单而通用的渗透工艺，形成了自组织的碳纳米管层。去除模板材料后，形成了一个独立的双层分层网络，具有6.02 S m-1的优异导电性和630 m2的高比BET表面积，同时存在微孔、中孔(高达4 nm)和大孔(>>50 nm)。硫气相沉积后的气体吸附测量和EFTEM元素测绘的综合分析表明，只有微孔和中孔可达，硫被包裹在双层结构中。因此，电渗透保持高而不失去必要的外部导电性。之后，这些复合材料被用于硫阴极的概念验证研究，证明了预先设计电极结构的重要性，电化学性能数据显示。在这种分层3D复合结构的帮助下，在锂半电池测试中，作为硫阴极，它可以在大约5.8 mAh cm-1的条件下实现超过100次循环的稳定性。
{"title":"Double Hierarchical 3D Carbon Nanotube Network with Tailored Structure as a Lithium Sulfur Cathode","authors":"H. Krüger, H. Cavers, O. Gronenberg, U. Schürmann, Y. Mishra, Jannick Jacobsen, J. Carstensen, N. Stock, L. Kienle, F. Schütt, R. Adelung, S. Hansen","doi":"10.1109/NAP51885.2021.9568505","DOIUrl":"https://doi.org/10.1109/NAP51885.2021.9568505","url":null,"abstract":"In this study, double hierarchical and highly porous 3D carbon nanotube/sulfur (CNTT/S) composites were synthesized. By coating a ceramic template material with a simple and versatile infiltration process of an aqueous carbon nanotube (CNT) dispersion a self-organized CNT layer is formed. After removing the template material, a freestanding double hierarchical network is created that show excellent electrical conductivity of 6.02 S m-1 and a high specific BET surface area of 630 m2 with the presence of micro-, mesopores (up to 4 nm) and macropores (>>50 nm) simultaneously. A combined analysis of gas sorption measurements and elemental mapping using EFTEM after sulfur vapor deposition revealed that only the micro- and mesopores were accessible and that the sulfur is encapsulated within the double hierarchy. Hence, the electric percolation remains high without losing the necessary outer conductivity. Thereafter, these composites were employed in a proof-of-concept study as a sulfur cathode, demonstrating the importance of predesigning an electrode structure, shown in electrochemical performance data. With the aid of this hierarchical 3D composite structure, it is possible to achieve a stability over 100 cycles with $approx$ 5.8 mAh cm-1 as a sulfur cathode in lithium half-cell tests.","PeriodicalId":6735,"journal":{"name":"2021 IEEE 11th International Conference Nanomaterials: Applications & Properties (NAP)","volume":"36 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2021-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82505143","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}
Pub Date : 2021-09-05DOI: 10.1109/NAP51885.2021.9568560
A. Nevgasimov, S. Dukarov, S. Petrushenko, R. Sukhov, Z. Bloshenko, V. Sukhov
The work is devoted to the study of the thermal dispergation of polycrystalline silver films, which occurs in the presence of low-melting metal. It was found that the liquid phase of lead or bismuth promotes the rapid decay of an initially continuous film into separate islands. In this case, one-component silver films of the same thickness remain continuous up to higher temperatures. The activation energy of the dewetting process, estimated near the melting temperature of the low-melting component, is 0.5 eV and 0.1 eV for Pb/Ag and Bi/Ag films, respectively. The values obtained are significantly lower than the typical values of the activation energy for solidphase diffusion. This indicates the important role of the liquid-phase mass transfer in the dispergation of Pb/Ag and Bi/Ag films.
{"title":"Effect of Lead and Bismuth on the De-Wetting of Continuous Argentum Films","authors":"A. Nevgasimov, S. Dukarov, S. Petrushenko, R. Sukhov, Z. Bloshenko, V. Sukhov","doi":"10.1109/NAP51885.2021.9568560","DOIUrl":"https://doi.org/10.1109/NAP51885.2021.9568560","url":null,"abstract":"The work is devoted to the study of the thermal dispergation of polycrystalline silver films, which occurs in the presence of low-melting metal. It was found that the liquid phase of lead or bismuth promotes the rapid decay of an initially continuous film into separate islands. In this case, one-component silver films of the same thickness remain continuous up to higher temperatures. The activation energy of the dewetting process, estimated near the melting temperature of the low-melting component, is 0.5 eV and 0.1 eV for Pb/Ag and Bi/Ag films, respectively. The values obtained are significantly lower than the typical values of the activation energy for solidphase diffusion. This indicates the important role of the liquid-phase mass transfer in the dispergation of Pb/Ag and Bi/Ag films.","PeriodicalId":6735,"journal":{"name":"2021 IEEE 11th International Conference Nanomaterials: Applications & Properties (NAP)","volume":"7 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2021-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84797248","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}
Pub Date : 2021-09-05DOI: 10.1109/NAP51885.2021.9568585
A. Tkachenko, A. Onishchenko, V. Prokopyuk, S. Yefimova, V. Klochkov, P. Maksimchuk, N. Kavok, Y. Posokhov
Aim. To evaluate the effects of GdYVO4:Eu3+ nanoparticles on the state of leukocyte cell membranes upon direct exposure.Materials and methods. The membranotropic fluorescent probe 2-(2’-OH-phenyl)-5-(4’-biphenyl)-1,3-oxazole was incubated directly with leukocyte suspensions obtained from blood treated directly with different concentrations of GdYVO4:Eu3+ nanoparticles (0 μg/ml, 20 μg/ml, 40 μg/ml, 80 μg/ml) during 24 h. The fluorescence of normal and tautomeric forms of the probe was registered using a FL8500 Fluorescence Spectrophotometer (Perkin Elmer, USA).Results. Our findings indicate that the statistically significant elevation in values of the tautomeric form fluorescence intensity-to-normal form fluorescence intensity ratio (IT*/IN*) was observed only for suspensions with the highest concentration of nanoparticles used, while at low concentrations nanoparticles did not alter the state of phospholipid bilayer in the region of membranes where the probe locates.Conclusions. Low concentrations of GdYVO4:Eu3+ nanoparticles don’t alter the lipid order of leukocyte cell membranes, while their high concentrations promote an increase in lipid order suggesting a decrease in fluidity and an increase in microviscosity of the area of phospholipid bilayer where the probe locates.
的目标。目的:评价GdYVO4:Eu3+纳米粒子直接暴露后对白细胞细胞膜状态的影响。材料和方法。将2-(2′- oh -苯基)-5-(4′-联苯)-1,3-oxazole致膜性荧光探针与经不同浓度GdYVO4:Eu3+纳米颗粒(0 μg/ml、20 μg/ml、40 μg/ml、80 μg/ml)直接处理的血液白细胞悬浮液直接孵育24 h，用FL8500型荧光分光光度计记录探针正常形态和互变异构体形态的荧光。我们的研究结果表明，仅在使用最高浓度纳米颗粒的悬浮液中，才观察到互变异构体形式的荧光强度与正常形式的荧光强度比(IT*/ in *)的值有统计学意义的升高，而在低浓度纳米颗粒时，探针所在的膜区域磷脂双分子层的状态没有改变。低浓度的GdYVO4:Eu3+纳米颗粒不会改变白细胞细胞膜的脂质秩序，而其高浓度会促进脂质秩序的增加，这表明探针所在的磷脂双分子层区域的流动性降低，微粘度增加。
{"title":"High Concentrations of GdYVO4:Eu3+ Nanoparticles Alter the State of White Blood Cell Membranes by Increasing Their Microviscosity","authors":"A. Tkachenko, A. Onishchenko, V. Prokopyuk, S. Yefimova, V. Klochkov, P. Maksimchuk, N. Kavok, Y. Posokhov","doi":"10.1109/NAP51885.2021.9568585","DOIUrl":"https://doi.org/10.1109/NAP51885.2021.9568585","url":null,"abstract":"Aim. To evaluate the effects of GdYVO4:Eu3+ nanoparticles on the state of leukocyte cell membranes upon direct exposure.Materials and methods. The membranotropic fluorescent probe 2-(2’-OH-phenyl)-5-(4’-biphenyl)-1,3-oxazole was incubated directly with leukocyte suspensions obtained from blood treated directly with different concentrations of GdYVO4:Eu3+ nanoparticles (0 μg/ml, 20 μg/ml, 40 μg/ml, 80 μg/ml) during 24 h. The fluorescence of normal and tautomeric forms of the probe was registered using a FL8500 Fluorescence Spectrophotometer (Perkin Elmer, USA).Results. Our findings indicate that the statistically significant elevation in values of the tautomeric form fluorescence intensity-to-normal form fluorescence intensity ratio (IT*/IN*) was observed only for suspensions with the highest concentration of nanoparticles used, while at low concentrations nanoparticles did not alter the state of phospholipid bilayer in the region of membranes where the probe locates.Conclusions. Low concentrations of GdYVO4:Eu3+ nanoparticles don’t alter the lipid order of leukocyte cell membranes, while their high concentrations promote an increase in lipid order suggesting a decrease in fluidity and an increase in microviscosity of the area of phospholipid bilayer where the probe locates.","PeriodicalId":6735,"journal":{"name":"2021 IEEE 11th International Conference Nanomaterials: Applications & Properties (NAP)","volume":"12 1","pages":"NRA05-1-NRA05-4"},"PeriodicalIF":0.0,"publicationDate":"2021-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84922413","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}
Pub Date : 2021-09-05DOI: 10.1109/NAP51885.2021.9568596
Y. Oleksii, E. Get’man, S. Radio, L. I. Ardanova, E. Zubov
Within the framework of the crystal–energy theory of isomorphous substitutions, the mixing energies and critical temperatures of decomposition (stability) of solid solutions with the tizonite structure in the La1-x Lnx F3, Ln = Ce–Ho systems are calculated. A diagram of the thermodynamic stability of solid solutions is presented, which makes it possible to predict the limits of substitutions depending on the temperature or the temperature of decomposition according to the given limits of substitutions. The regions of thermodynamic stability, instability and metastability of solid solutions are determined. The calculation results in a number of systems that do not contradict the experimental data described earlier in the literature. They can be useful in choosing the ratio of components in “mixed” matrices, the amount of activator in luminescent, laser and other practically important materials, as well as for the immobilization of toxic and radioactive waste.
{"title":"Isomorphous substitutions and Stability of Solid Solutions in La1-xLnxF3, Ln = Ce-Ho Systems","authors":"Y. Oleksii, E. Get’man, S. Radio, L. I. Ardanova, E. Zubov","doi":"10.1109/NAP51885.2021.9568596","DOIUrl":"https://doi.org/10.1109/NAP51885.2021.9568596","url":null,"abstract":"Within the framework of the crystal–energy theory of isomorphous substitutions, the mixing energies and critical temperatures of decomposition (stability) of solid solutions with the tizonite structure in the La1-x Lnx F3, Ln = Ce–Ho systems are calculated. A diagram of the thermodynamic stability of solid solutions is presented, which makes it possible to predict the limits of substitutions depending on the temperature or the temperature of decomposition according to the given limits of substitutions. The regions of thermodynamic stability, instability and metastability of solid solutions are determined. The calculation results in a number of systems that do not contradict the experimental data described earlier in the literature. They can be useful in choosing the ratio of components in “mixed” matrices, the amount of activator in luminescent, laser and other practically important materials, as well as for the immobilization of toxic and radioactive waste.","PeriodicalId":6735,"journal":{"name":"2021 IEEE 11th International Conference Nanomaterials: Applications & Properties (NAP)","volume":"26 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2021-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84044194","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}
Pub Date : 2021-09-05DOI: 10.1109/NAP51885.2021.9568390
L. Dekhtyaruk, Y. Shkurdoda, Yu.M. Shabelnyk, A. Saltykova, A. Chornous, A. P. Kharchenko, V. Virchenko
Using a two-current model [1], [2] and the theory of dimensional effects [3], [4], a qualitative analysis of the giant magnetoresistance effect in a three-layer magnetically ordered film (sandwich), which is quantitatively characterized by a magnetoresistance ratio (MRR) $delta$, was presented. It was shown that in the region of small thickness of the magnetic covering layer, in comparison with the thickness of the basic metal layer and the non-magnetic layer, the MRR of the conductor increased, while in the opposite region of the thickness of the magnetic covering layer, the opposite trend is observed, namely, the value of $delta$ decreased. In the case when the thickness of the magnetic covering layer of the metal coincided with the total thickness of the basic magnetic layer and the non-magnetic layer, the MRR reached its maximum value due to the absence of a shunt effect.
{"title":"Explanation of Giant Magnetoresistance Effect in Magnetic Co/Cu/Co Sandwiches","authors":"L. Dekhtyaruk, Y. Shkurdoda, Yu.M. Shabelnyk, A. Saltykova, A. Chornous, A. P. Kharchenko, V. Virchenko","doi":"10.1109/NAP51885.2021.9568390","DOIUrl":"https://doi.org/10.1109/NAP51885.2021.9568390","url":null,"abstract":"Using a two-current model [1], [2] and the theory of dimensional effects [3], [4], a qualitative analysis of the giant magnetoresistance effect in a three-layer magnetically ordered film (sandwich), which is quantitatively characterized by a magnetoresistance ratio (MRR) $delta$, was presented. It was shown that in the region of small thickness of the magnetic covering layer, in comparison with the thickness of the basic metal layer and the non-magnetic layer, the MRR of the conductor increased, while in the opposite region of the thickness of the magnetic covering layer, the opposite trend is observed, namely, the value of $delta$ decreased. In the case when the thickness of the magnetic covering layer of the metal coincided with the total thickness of the basic magnetic layer and the non-magnetic layer, the MRR reached its maximum value due to the absence of a shunt effect.","PeriodicalId":6735,"journal":{"name":"2021 IEEE 11th International Conference Nanomaterials: Applications & Properties (NAP)","volume":"10 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2021-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81896051","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}
Pub Date : 2021-09-05DOI: 10.1109/NAP51885.2021.9568580
A. Gondlyakh, A. Sokolskiy, Tetiana Shylovych, Yaroslav I. Shylovych, A. Chemeris, S. Antonyuk
This article is devoted to the issue of numerical modeling of the processes of nonlinear deformation and fracture of nanomodified ceramics. Deformation of an elementary volume with nanotube is carried out on the basis of a three-layer scheme “nanotube - contact layer - ceramic”. Integration of the resolving system of equilibrium equations “nanotube-ceramic” is carried out on the basis of the finite element method. On the basis of the energy approach, a technique has been developed for the efficient determination of the additional energy required to pull out a nanotube from a ceramic solid. The study of the dependence of the ultimate strength of nanomodified ceramics depending on the percentage of nanotubes in the ceramic is carried out. The numerical simulation results are in good agreement with the experimental results. The difference between numerically obtained ultimate strengths and experimental ultimate strengths does not exceed 5%. The developed methods can be used in the practice of designing structures made of nanomodified ceramics.
{"title":"Numerical Determination of the Strength of Nanomodified Ceramics","authors":"A. Gondlyakh, A. Sokolskiy, Tetiana Shylovych, Yaroslav I. Shylovych, A. Chemeris, S. Antonyuk","doi":"10.1109/NAP51885.2021.9568580","DOIUrl":"https://doi.org/10.1109/NAP51885.2021.9568580","url":null,"abstract":"This article is devoted to the issue of numerical modeling of the processes of nonlinear deformation and fracture of nanomodified ceramics. Deformation of an elementary volume with nanotube is carried out on the basis of a three-layer scheme “nanotube - contact layer - ceramic”. Integration of the resolving system of equilibrium equations “nanotube-ceramic” is carried out on the basis of the finite element method. On the basis of the energy approach, a technique has been developed for the efficient determination of the additional energy required to pull out a nanotube from a ceramic solid. The study of the dependence of the ultimate strength of nanomodified ceramics depending on the percentage of nanotubes in the ceramic is carried out. The numerical simulation results are in good agreement with the experimental results. The difference between numerically obtained ultimate strengths and experimental ultimate strengths does not exceed 5%. The developed methods can be used in the practice of designing structures made of nanomodified ceramics.","PeriodicalId":6735,"journal":{"name":"2021 IEEE 11th International Conference Nanomaterials: Applications & Properties (NAP)","volume":"60 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2021-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90752936","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}
Pub Date : 2021-09-05DOI: 10.1109/NAP51885.2021.9568597
Maksym Yermakov, O. Dobrozhan, S. Kakherskyi, R. Pshenychnyi, A. Opanasyuk
In this work, a multilayer structure was obtained using ZnO and Cu2 ZnSnS4 (CZTS) inks on a molybdenum substrate by spraying. The obtained samples were annealed in Argon for 10 and 60 min at temperatures of 250°C, 450°C and 550°C. Structural and substructural characteristics were studied by X-ray diffraction. Due to this, the influence of temperature and annealing time on the sizes of coherent scattering regions (CSR), the level of microdeformations and the lattice parameters of the obtained samples were investigated. Based on the study, the optimal annealing conditions in Argon were determined to obtain multilayer structures using ZnO and Cu2ZnSnS4 materials for use in solar energy.
{"title":"Influence of Temperature Annealing on Structural and Substructural Properties of Heterojunction ZnO / Cu2ZnSnS4 Obtained by Spraying Nanoinks","authors":"Maksym Yermakov, O. Dobrozhan, S. Kakherskyi, R. Pshenychnyi, A. Opanasyuk","doi":"10.1109/NAP51885.2021.9568597","DOIUrl":"https://doi.org/10.1109/NAP51885.2021.9568597","url":null,"abstract":"In this work, a multilayer structure was obtained using ZnO and Cu2 ZnSnS4 (CZTS) inks on a molybdenum substrate by spraying. The obtained samples were annealed in Argon for 10 and 60 min at temperatures of 250°C, 450°C and 550°C. Structural and substructural characteristics were studied by X-ray diffraction. Due to this, the influence of temperature and annealing time on the sizes of coherent scattering regions (CSR), the level of microdeformations and the lattice parameters of the obtained samples were investigated. Based on the study, the optimal annealing conditions in Argon were determined to obtain multilayer structures using ZnO and Cu2ZnSnS4 materials for use in solar energy.","PeriodicalId":6735,"journal":{"name":"2021 IEEE 11th International Conference Nanomaterials: Applications & Properties (NAP)","volume":"38 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2021-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78888304","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}
Pub Date : 2021-09-05DOI: 10.1109/NAP51885.2021.9568514
Zhang Zhengchuan, V. Tarelnyk, I. Konoplianchenko, Liu Guanjun, Du Xin, Y. Hua
The composite coatings of the tin bronze surface that was formed by alternately Electro-spark deposition (ESD) applying the soft anti-friction material of silver, copper, and babbit B83. The analysis of deposition on mass, roughness, cross-section morphology, surface morphology, thickness, elemental composition, and microhardness of the coatings were investigated by electronic scales, 3D optical profilometers, metallographic microscope, scanning electron microscopy (SEM), energy dispersion spectrum (EDS) and Vickers microhardness tester. The results show that the optimal process parameters of ESD are as follows: voltage is 60V/60V/30V, capacitance is 150μF/150μF/90μF and productive capacity is 3(min/cm2) /3(min/cm2) /4(min/cm2), respectively. Under the optimal parameters, the unit coating mass of the substrate is 54.4 mg/cm2, and the surface roughness of the coating is 32.3μm. The coatings are dense, metallurgical fusion with the substrate, and under the optimal parameters, the thickness of the coatings is about 100 μm. The elemental composition of the three characteristic regions (smooth surface, rough surface, and pore) on the surface of the composite coating varies significantly due to the different production modes. The hardness distribution from the coating surface to the substrate increases first, then decreases, and then increases gradually. The surface microhardness of the composite coatings is 29 HV0.01, which is about 82% lower than that of the tin bronze substrate (161 HV0.01).
{"title":"Research on the Characterization of Ag+Cu+B83 Composite Coatings on the Surface of Tin Bronze by Electro-spark Deposition","authors":"Zhang Zhengchuan, V. Tarelnyk, I. Konoplianchenko, Liu Guanjun, Du Xin, Y. Hua","doi":"10.1109/NAP51885.2021.9568514","DOIUrl":"https://doi.org/10.1109/NAP51885.2021.9568514","url":null,"abstract":"The composite coatings of the tin bronze surface that was formed by alternately Electro-spark deposition (ESD) applying the soft anti-friction material of silver, copper, and babbit B83. The analysis of deposition on mass, roughness, cross-section morphology, surface morphology, thickness, elemental composition, and microhardness of the coatings were investigated by electronic scales, 3D optical profilometers, metallographic microscope, scanning electron microscopy (SEM), energy dispersion spectrum (EDS) and Vickers microhardness tester. The results show that the optimal process parameters of ESD are as follows: voltage is 60V/60V/30V, capacitance is 150μF/150μF/90μF and productive capacity is 3(min/cm2) /3(min/cm2) /4(min/cm2), respectively. Under the optimal parameters, the unit coating mass of the substrate is 54.4 mg/cm2, and the surface roughness of the coating is 32.3μm. The coatings are dense, metallurgical fusion with the substrate, and under the optimal parameters, the thickness of the coatings is about 100 μm. The elemental composition of the three characteristic regions (smooth surface, rough surface, and pore) on the surface of the composite coating varies significantly due to the different production modes. The hardness distribution from the coating surface to the substrate increases first, then decreases, and then increases gradually. The surface microhardness of the composite coatings is 29 HV0.01, which is about 82% lower than that of the tin bronze substrate (161 HV0.01).","PeriodicalId":6735,"journal":{"name":"2021 IEEE 11th International Conference Nanomaterials: Applications & Properties (NAP)","volume":"30 1","pages":"1-8"},"PeriodicalIF":0.0,"publicationDate":"2021-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90298819","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}
Pub Date : 2021-09-05DOI: 10.1109/NAP51885.2021.9568552
P. Decleer, D. Vande Ginste
The influence of barrier thickness variability on the charge transfer characteristics of an InP/InAs/InP nanowire resonant-tunneling diode is studied. The transmission probability through the diode is calculated by solving the time-dependent effective-mass Schrödinger equation with the Alternating-Direction Hybrid Implicit-Explicit (ADHIE) Finite-Difference Time-Domain (FDTD) method. This recently developed method is tailored towards multiscale problems and thus allows for a much faster evaluation of the transmission probability compared to the commonly used leapfrog FDTD method. Accurate and efficient modeling of small geometric features with the ADHIE-FDTD method now facilitates the development of a robust Monte Carlo method to assess the significant influence of the thickness of the barriers on the transmission probability and the current-voltage characteristic.
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Pub Date : 2021-09-05DOI: 10.1109/NAP51885.2021.9568545
Y. Bleyan
The theoretical investigation of magnetobiexciton in ellipsoidal quantum dot is done in the presence of the magnetic field in the framework of the variation method. The magnetobiexciton recombination energy from the magnetic field value is calculated. The magnetobiexciton oscillator strength is considered as a function of the magnetic field value. Finally, the magnetobiexciton linear absorption coefficient for the different magnetic field values and different geometrical parameters is computed.
{"title":"Optical Properties of MagnetoBiexciton in Ellipsoidal Quantum Dot","authors":"Y. Bleyan","doi":"10.1109/NAP51885.2021.9568545","DOIUrl":"https://doi.org/10.1109/NAP51885.2021.9568545","url":null,"abstract":"The theoretical investigation of magnetobiexciton in ellipsoidal quantum dot is done in the presence of the magnetic field in the framework of the variation method. The magnetobiexciton recombination energy from the magnetic field value is calculated. The magnetobiexciton oscillator strength is considered as a function of the magnetic field value. Finally, the magnetobiexciton linear absorption coefficient for the different magnetic field values and different geometrical parameters is computed.","PeriodicalId":6735,"journal":{"name":"2021 IEEE 11th International Conference Nanomaterials: Applications & Properties (NAP)","volume":"32 1","pages":"1-3"},"PeriodicalIF":0.0,"publicationDate":"2021-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77340072","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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