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/NAP51885.2021.9568390
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/NAP51885.2021.9568530
K.G. Ayvazyan, M. V. Katkov, M. Lebedev, G. Ayvazyan
We present investigations of optical properties of black silicon (b-Si) nanostructures passivated with several high-k metal oxides (Al2 O3, TiO2, HfO2 and Sc2 O3), obtained by atomic layer deposition (ALD) method. The reflectivity was studied using the finite difference time domain (FDTD) method as well as experimentally, where Si wafers was structured by reactive ion etching method for b-Si fabrication. Modeling and measurements show improvements in the antireflection properties of thin-film/b-Si nanostructures over a wide range of light wavelengths. TiO2, HfO2 and Sc2 O3 films provide a good alternative to Al2 O3 as passivating materials and antireflection coatings.
{"title":"Enhanced Light-trapping with Conformal ALD Coating of Black Silicon by High-k Metal Oxides","authors":"K.G. Ayvazyan, M. V. Katkov, M. Lebedev, G. Ayvazyan","doi":"10.1109/NAP51885.2021.9568530","DOIUrl":"https://doi.org/10.1109/NAP51885.2021.9568530","url":null,"abstract":"We present investigations of optical properties of black silicon (b-Si) nanostructures passivated with several high-k metal oxides (Al<inf>2</inf> O<inf>3</inf>, TiO<inf>2</inf>, HfO<inf>2</inf> and Sc<inf>2</inf> O<inf>3</inf>), obtained by atomic layer deposition (ALD) method. The reflectivity was studied using the finite difference time domain (FDTD) method as well as experimentally, where Si wafers was structured by reactive ion etching method for b-Si fabrication. Modeling and measurements show improvements in the antireflection properties of thin-film/b-Si nanostructures over a wide range of light wavelengths. TiO<inf>2</inf>, HfO<inf>2</inf> and Sc<inf>2</inf> O<inf>3</inf> films provide a good alternative to Al<inf>2</inf> O<inf>3</inf> as passivating materials and antireflection coatings.","PeriodicalId":6735,"journal":{"name":"2021 IEEE 11th International Conference Nanomaterials: Applications & Properties (NAP)","volume":"24 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":"78162966","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/NAP51885.2021.9568599
Vishal Shrivastav, S. Sundriyal, U. Tiwari, A. Deep
The new approach to synthesize porous Co3S4 nanoparticles derived from ZIF-67 polyhedrons decorated with WO3 rectangular sheets is demonstrated. Furthermore, the composite material is employed as a negative electrode for high energy density supercapacitor application. The one pot hydrothermal treatment of ZIF-67 with WO3 precursor give the Co3S4/WO3 composites. The obtained samples are evaluated with cyclic voltammetry, galvanostatic charge/discharge and electrochemical impedance spectroscopy tests. The composites delivered the highest specific capacitance of 668 F/g at the current density of 1 A/g in 1 M H2 SO4 electrolyte. Addition to this, the composite material remains stable upto 2000 cycles of charging/discharging cycles with 94% capacitance retention. The excellent electrochemical performance is attributed to the synergy between the sheet like WO3 structure and Co3S4 nanoparticles. The positive electrochemical results of the composites demonstrate its potential or practical hybrid supercapacitor application.
本文介绍了一种以ZIF-67多面体为材料，经WO3矩形片修饰制备多孔Co3S4纳米粒子的新方法。此外，该复合材料还被用作高能量密度超级电容器的负极。用WO3前驱体对ZIF-67进行一锅水热处理，得到Co3S4/WO3复合材料。用循环伏安法、恒流充放电法和电化学阻抗谱法对所得样品进行评价。在1 M H2 SO4电解质中，当电流密度为1 A/g时，复合材料的比电容最高可达668 F/g。除此之外，复合材料在2000次充电/放电循环中保持稳定，电容保持率为94%。优异的电化学性能归功于片状WO3结构与Co3S4纳米粒子之间的协同作用。该复合材料的良好电化学性能证明了其在混合超级电容器中的应用潜力。
{"title":"ZIF-67 Derived Co3S4/WO3 Composites as a Negative Electrode for Hybrid Supercapacitor Application","authors":"Vishal Shrivastav, S. Sundriyal, U. Tiwari, A. Deep","doi":"10.1109/NAP51885.2021.9568599","DOIUrl":"https://doi.org/10.1109/NAP51885.2021.9568599","url":null,"abstract":"The new approach to synthesize porous Co<inf>3</inf>S<inf>4</inf> nanoparticles derived from ZIF-67 polyhedrons decorated with WO<inf>3</inf> rectangular sheets is demonstrated. Furthermore, the composite material is employed as a negative electrode for high energy density supercapacitor application. The one pot hydrothermal treatment of ZIF-67 with WO<inf>3</inf> precursor give the Co<inf>3</inf>S<inf>4</inf>/WO<inf>3</inf> composites. The obtained samples are evaluated with cyclic voltammetry, galvanostatic charge/discharge and electrochemical impedance spectroscopy tests. The composites delivered the highest specific capacitance of 668 F/g at the current density of 1 A/g in 1 M H<inf>2</inf> SO<inf>4</inf> electrolyte. Addition to this, the composite material remains stable upto 2000 cycles of charging/discharging cycles with 94% capacitance retention. The excellent electrochemical performance is attributed to the synergy between the sheet like WO<inf>3</inf> structure and Co<inf>3</inf>S<inf>4</inf> nanoparticles. The positive electrochemical results of the composites demonstrate its potential or practical hybrid supercapacitor application.","PeriodicalId":6735,"journal":{"name":"2021 IEEE 11th International Conference Nanomaterials: Applications & Properties (NAP)","volume":"55 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":"76748065","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/NAP51885.2021.9568521
M. Vasyukhno, V. S. Klochok, N. I. Shumakova, A. Rylova, I. Protsenko
In the phenomenological approximation, the relations for the differential temperatures coefficient of resistance $left(beta_{T}=frac{partiallnrho}{partial T}right)$ and magnetic coefficient of resistance $left(beta_{B}=frac{partiallnrho}{partial B}right)$, where $rho=sum_{(i)}c_{i}rho_{i}$, for multicomponent high-entropy film alloys (HEA) based on magnetic and non-magnetic metals are obtained. Experimental values $beta_{T},beta_{B}^{MR}$ and $beta_{B}^{GMR}quad$ agree well with the calculations, which allows for the prognosis of the value $beta_{T}$ for normal $beta_{B}^{M/R}$ and for giant $beta_{B}^{GMR}$ magnetoresistance based on experimental data for temperature and magnetic coefficients of individual components.
{"title":"Thermo- and Magnetoresistive Properties of Multicomponent Film Materials Based on Magnetic and Non-magnetic Metals","authors":"M. Vasyukhno, V. S. Klochok, N. I. Shumakova, A. Rylova, I. Protsenko","doi":"10.1109/NAP51885.2021.9568521","DOIUrl":"https://doi.org/10.1109/NAP51885.2021.9568521","url":null,"abstract":"In the phenomenological approximation, the relations for the differential temperatures coefficient of resistance $left(beta_{T}=frac{partiallnrho}{partial T}right)$ and magnetic coefficient of resistance $left(beta_{B}=frac{partiallnrho}{partial B}right)$, where $rho=sum_{(i)}c_{i}rho_{i}$, for multicomponent high-entropy film alloys (HEA) based on magnetic and non-magnetic metals are obtained. Experimental values $beta_{T},beta_{B}^{MR}$ and $beta_{B}^{GMR}quad$ agree well with the calculations, which allows for the prognosis of the value $beta_{T}$ for normal $beta_{B}^{M/R}$ and for giant $beta_{B}^{GMR}$ magnetoresistance based on experimental data for temperature and magnetic coefficients of individual components.","PeriodicalId":6735,"journal":{"name":"2021 IEEE 11th International Conference Nanomaterials: Applications & Properties (NAP)","volume":"34 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":"75057790","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.
{"title":"Uncertainty Quantification of Charge Transfer through a Nanowire Resonant-Tunneling Diode with an ADHIE-FDTD Method","authors":"P. Decleer, D. Vande Ginste","doi":"10.1109/NAP51885.2021.9568552","DOIUrl":"https://doi.org/10.1109/NAP51885.2021.9568552","url":null,"abstract":"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.","PeriodicalId":6735,"journal":{"name":"2021 IEEE 11th International Conference Nanomaterials: Applications & Properties (NAP)","volume":"23 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":"72922592","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/NAP51885.2021.9568545
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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