2020 IEEE 10th International Conference Nanomaterials: Applications & Properties (NAP)最新文献

{"title":"Terahertz-Frequency Signal Source Based on an Array of Antiferromagnetic Spin Hall Oscillators","authors":"Oleh Shtanko, O. Prokopenko","doi":"10.1109/NAP51477.2020.9309712","DOIUrl":"https://doi.org/10.1109/NAP51477.2020.9309712","url":null,"abstract":"Terahertz-frequency (TF) signals have many promising applications in applied physics and technology. However, to date, there are no rather large-power (>100$mu$W) compact and reliable sources of coherent TF radiation. One of the prospective approaches to develop such TF signal sources is based on the utilization of magnetic dynamics in the spin Hall oscillators (SHOs) based on antiferromagnets (AFMs). While a single antiferromagnetic SHO can typically emit output TF signal power $sim10mu$W or less, this power can be substantially improved if an array of synchronized SHOs is used. In this paper, we evaluate the output power of a TF signal source based on an array of antiferromagnetic SHOs embedded in a high-Q dielectric resonator and consider two limiting cases: the case of independent SHOs and the case of ideal phase-locked SHOs. Our calculations show that even a small number ($leq$10) of synchronized SHOs embedded in a high-Q dielectric resonator can provide output TF signal power of $sim100-1000mu$W (depending on their operation frequency), which might be sufficient for the majority of practical applications.","PeriodicalId":6770,"journal":{"name":"2020 IEEE 10th International Conference Nanomaterials: Applications & Properties (NAP)","volume":"98-100 1","pages":"01NMM04-1-01NMM04-4"},"PeriodicalIF":0.0,"publicationDate":"2020-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88754124","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}

{"title":"Magnetoresisitive Properties of Layered Structures Based on Fe and SiO2","authors":"I. M. Pazukha, R. M. Petrenko, Y. Shkurdoda, A. Lohvynov, Oleksandr O.Pylypenko, V. V. Shchotkin, S. R. Dolgov-Gordiichuk, L. Dekhtyaruk","doi":"10.1109/NAP51477.2020.9309685","DOIUrl":"https://doi.org/10.1109/NAP51477.2020.9309685","url":null,"abstract":"Layered structures based on Fe and SiO prepared by layer-by-layer electron-beam condensation method are presented. It was demonstrated that all investigated systems are characterized by anisotropic magnetoresistance before and after annealing. The value of both longitudinal and transverse magnetoresistance in the magnetic field up to 600 mT does not exceed 0.1% at room temperature. It is associated with the reduction of magnetization in comparison with the magnetization of bulk materials.","PeriodicalId":6770,"journal":{"name":"2020 IEEE 10th International Conference Nanomaterials: Applications & Properties (NAP)","volume":"43 1","pages":"01NMM07-1-01NMM07-3"},"PeriodicalIF":0.0,"publicationDate":"2020-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88063750","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}

{"title":"Obtaining and Characterization of Multicomponent Gradient Mutlilayer Carbide Coatings","authors":"V. Perekrestov, Yu. V. Gannych, Y. Kosminska","doi":"10.1109/NAP51477.2020.9309631","DOIUrl":"https://doi.org/10.1109/NAP51477.2020.9309631","url":null,"abstract":"Two new experimental devices, which allow obtaining both gradient multilayer composites and coatings of each of their layers separately are presented. Using them, a wide range of compositions of multicomponent carbide coatings is obtained. Among them there are three groups- (a) coatings with high Cr content (b) coatings with high Ti and C content (c) coatings with high mixing entropy and composition closer to equimolar. Group (a) is characterized by BCC lattice and elongated surface structures. Group (b) has an FCC lattice, and at a content of C>51 at. % there is a porous structure on the surface, which adversely affects the microhardness of the coatings. For group (c) mainly amorphous/nanocrystalline or FCC structure, slight surface roughness, and good microhardness values were found. Multilayer composites demonstrate the best mechanical properties - high adhesion and good microhardness (23-28 GPa).","PeriodicalId":6770,"journal":{"name":"2020 IEEE 10th International Conference Nanomaterials: Applications & Properties (NAP)","volume":"20 1","pages":"01TFC08-1-01TFC08-5"},"PeriodicalIF":0.0,"publicationDate":"2020-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91228984","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}

{"title":"Sequential Magnetic Mapping of Bacteria Loaded with Pd-Fe Nanoparticles","authors":"J. Claxton, Nadeem Joudeh, A. Røyne, D. Linke, P. Mikheenko","doi":"10.1109/NAP51477.2020.9309619","DOIUrl":"https://doi.org/10.1109/NAP51477.2020.9309619","url":null,"abstract":"Magnetic nanoparticles are of widespread use in nanotechnology. Palladium nanoparticles are among the most unusual since they combine magnetism with high catalytic activity. These nanoparticles could be obtained biologically by exposing bacteria to a palladium salt. However, due to the small size and weak magnetism, it is challenging to measure their magnetic properties. One of the solutions to enhance their magnetism is to incorporate a small number of iron atoms into them. After this procedure, the nanoparticles and bacteria can be embedded in resin and characterized by magnetic force microscopy. This technique allows imaging cross-sections of the bacteria with nanoparticles but cannot give information from the depth of the sample. Here we report on an approach partially solving this problem. Its novelty lies in measurements of consecutive thin slices of resin, which allows mapping cross-sections of individual bacteria and different parts of the material surrounding the same bacterium. An interesting observed feature is the formation of magnetic chains of nanoparticles outside of the bacteria.","PeriodicalId":6770,"journal":{"name":"2020 IEEE 10th International Conference Nanomaterials: Applications & Properties (NAP)","volume":"22 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2020-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82370542","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}

{"title":"Critical properties study of exactly solved spin models for ferromagnets and ferroelectics","authors":"A. Galdina, A. Turinov","doi":"10.1109/NAP51477.2020.9309622","DOIUrl":"https://doi.org/10.1109/NAP51477.2020.9309622","url":null,"abstract":"Development of the hydrokinetic models of superdense matter and systems with phase transition points of a critical type is of great fundamental interest. The exact analytical expressions for the critical exponents of the model with the surface tension are known for the case of critical and tricritical points, that enables to fix their parameters directly, depending on the universality class, as well as demonstrate the possibility of non-Fisher’s universality classes where the conventional scaling relations are violated. The thermodynamic method for the investigation of critical states allows determining the type of critical behavior and the behavior of all thermodynamic quantities characterizing the system under consideration, depending on the values of a critical slope of the phase equilibrium curve and adiabatic coefficients of stability even when information of the system is limited. In this work, the critical properties of certain spin models were examined. The properties of the two-dimensional exactly solvable Lieb and Baxter models in the critical region are considered. From the point of view of the thermodynamic stability, the behavior of adiabatic and isodynamic parameters for these models is analyzed, and the types of their critical behavior are determined. The reasons for the violation of the scaling law hypothesis and the universality hypothesis for the models are clarified. It is shown that the type of phase transition depends on the value of the interaction parameter.","PeriodicalId":6770,"journal":{"name":"2020 IEEE 10th International Conference Nanomaterials: Applications & Properties (NAP)","volume":"52 1","pages":"02TM10-1-02TM10-4"},"PeriodicalIF":0.0,"publicationDate":"2020-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80064785","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}

{"title":"Formation of C/Zn C/Ni Nanocomposites for Potential Application in Electrodes of LIB","authors":"A. Kornyushchenko, S. Shevchenko, V. Natalich, V. Perekrestov","doi":"10.1109/NAP51477.2020.9309709","DOIUrl":"https://doi.org/10.1109/NAP51477.2020.9309709","url":null,"abstract":"The paper describes growth mechanisms of porous carbon nanostructures, and C/Zn, C/Ni nanocomposites formation. The developed by us technological approach is based on the self-organization of small relative supersaturations of deposited vapors. On the first stage, porous Zn and Ni nanosystems have been obtained. Then they were subsequently used as precursors for the deposition of porous turbostratic graphite. Based on the comprehensive studies of the obtained porous C/Zn and C/Ni composites, it has been shown that the prerequisites for the nucleation and growth of carbon nanowires, fibers, or diamond inclusions are created on the local areas of the growing turbostratic graphite. A conclusion is made about the possibility of using the technological approach described in work for creating electrodes of lithium-ion batteries (LIB).","PeriodicalId":6770,"journal":{"name":"2020 IEEE 10th International Conference Nanomaterials: Applications & Properties (NAP)","volume":"3 1","pages":"02NEE05-1-02NEE05-3"},"PeriodicalIF":0.0,"publicationDate":"2020-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89110856","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}

{"title":"Tracking Additive Manufacturing Using Machine Vision","authors":"Lenning A. Davis IV, J. Donnal, M. Kutzer","doi":"10.1109/NAP51477.2020.9309721","DOIUrl":"https://doi.org/10.1109/NAP51477.2020.9309721","url":null,"abstract":"This paper presents a method of vision-based trajectory reconstruction for additive manufacturing (AM). With the rise in popularity of AM comes severe cyber-physical risks. Towards addressing this issue, this paper presents a method of reconstructing printhead motion with a minimally invasive camera module retrofit. A feature based Visual Odometry (VO) algorithm is used to estimate the relative motion of the extruder, leveraging expanded methods from the MATLAB Computer Vision Toolbox. Preliminary results in simulation demonstrate feasibility of the proposed VO method and identify factors that may limit performance. Further, a hardware implementation is demonstrated on a retrofitted LulzBot TAZ6, as well as novel methods to improve feature-based VO performance.","PeriodicalId":6770,"journal":{"name":"2020 IEEE 10th International Conference Nanomaterials: Applications & Properties (NAP)","volume":"90 1","pages":"02SAMA22-1-02SAMA22-5"},"PeriodicalIF":0.0,"publicationDate":"2020-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88239566","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}

{"title":"Synthesis and Study of the Photodynamic Activity of Titanium-based Nanocomposites on MDA-MB-231 Cells","authors":"Pravena Ramachandran, C. Lee, Boon-Keat Khor, R. Doong, C. Oon, H. Lee","doi":"10.1109/NAP51477.2020.9309691","DOIUrl":"https://doi.org/10.1109/NAP51477.2020.9309691","url":null,"abstract":"Breast cancer is the most common prevalent cancer in women, and the second main cause of cancer death in women, after lung cancer. Among the emerging cancer therapy methods, photodynamic therapy (PDT) with titanium dioxide nanoparticles (TiO2 NPs) as photosensitizing agent has gained great interest due to its high efficiency. However, its application for PDT is limited due to its wide bandgap $(sim 3.2eV)$, which can only be excited by ultraviolet irradiation. In this study, TiO2 NPs conjugated with N-doped graphene quantum dots composites ($N-GQDs/TiO_{2}$ NCs) were successfully prepared by the two-pot hydrothermal method. The synthesized nanocomposites were characterized by Ultraviolet-visible Diffuse Reflectance spectrophotometer (UVDRS), high-resolution transmission electron microscopy (HRTEM) and X-ray powder diffraction (XRD). The results exhibited that TiO2 particles were located on the surface of the 2-D graphene nanosheets in $N-GQDs/TiO_{2}$ NCs $(9-11nm)$ with high crystallization. Dispersion of NCs in cell culture were studied prior to cytotoxicity assay and PDT. Dispersing this NCs in Dulbecco’s modified eagle’s medium (DMEM) with 1% fetal bovine serum (FBS) $(86.8pm 4.3nm)$ resulted in smaller hydrodynamic size as compared to DMEM without FBS (679.9 $pm 3.7nm)$ and deionized water (DI water) $(203.5pm 4.8nm)$. Cytotoxicity assay was tested using 0. 01-1 mg/mL of N-GQDs/TiO2 NCs for 24 h without light irradiation. The initial cell viability study presents the safe concentration was from 0.01 mg/mL to 0.5 mg/mL as viability decreased prominently at 1.0 mg/mL. The $N-GQDs/TiO_{2}$ NCs were photo-activated with infrared light which has better penetrability in deeper locations in the breast tissue due to their nano-scale size. Upon photo-activation, the nanocomposites generate reactive oxygen species (ROS) that cause cell death in MDA-MB-231 breast cancer cells. At constant light energy $(20J/cm^{2})$, increasing N-GQDs/TiO2 NCs concentrations led to the increased intracellular ROS levels that elevated cell death rate in MDAMB-231 cells. The results suggested $N-GQDs/TiO_{2}$ NCs as a potential PDT photosensitizing agent with infrared irradiation.","PeriodicalId":6770,"journal":{"name":"2020 IEEE 10th International Conference Nanomaterials: Applications & Properties (NAP)","volume":"31 1","pages":"02BA01-1-02BA01-4"},"PeriodicalIF":0.0,"publicationDate":"2020-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88261444","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}

{"title":"Synthesis of Hybrid Partially Oxidized Nanodispersed Metal Particles with Simultaneous Surface Functionalization","authors":"E. Pashchenko, D. Savchenko, O. Kaidash, S. Kukharenko, Y. Rumiantseva, O. Buriachek","doi":"10.1109/NAP51477.2020.9309599","DOIUrl":"https://doi.org/10.1109/NAP51477.2020.9309599","url":null,"abstract":"The synthesis of nanodispersed partially oxidized metal particles by the reduction of salts of the corresponding elements in diethylene glycol is studied. The possibility of functionalization of the surface of the forming particles during in-situ grafting of the polymerization product of Bisphenol A dicyanate ester has been shown. Reversible rearrangement of the structure of metal-grafted polymer complexes under the action of mechanical loads has been revealed.","PeriodicalId":6770,"journal":{"name":"2020 IEEE 10th International Conference Nanomaterials: Applications & Properties (NAP)","volume":"2 1","pages":"01NSSA04-1-01NSSA04-4"},"PeriodicalIF":0.0,"publicationDate":"2020-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88380691","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}

{"title":"Target Surface Temperature Measurements in dc Magnetrons","authors":"L. Shaginyan, M. Mironov, A. Kuzmichev, I. L. Shaginyan","doi":"10.1109/NAP51477.2020.9309601","DOIUrl":"https://doi.org/10.1109/NAP51477.2020.9309601","url":null,"abstract":"New simple method for direct measurements of target surface temperature during DC magnetron sputtering is developed. Along with temperature measurements we measured also the emissivity of targets. It is demonstrated that the surface temperature of the targets (Cu, Mo, Nb discs) may substantially (up to $sim 3000mathrm{C})$ exceed the temperature of the volume of the target. The definition of a “target surface temperature” is given. It is supposed that the thickness of the surface layer that appears on a target subjected to the ion bombardment is equal or close to the penetration depth of ions bombarding the target. The physical model explaining the formation of the surface layer is suggested. The main idea of the model is that the Ar ions bombarding the target may effectively transfer their kinetic energy mostly to the ionic subsystem of a metal rather than to its electron subsystem. Due to very low mobility of metal ions within the layer the thermal conductivity of the layer is substantially lower compared to the rest target volume. As a result the temperature of the layer is higher than that of the rest part of the target.","PeriodicalId":6770,"journal":{"name":"2020 IEEE 10th International Conference Nanomaterials: Applications & Properties (NAP)","volume":"13 1","pages":"01TFC06-1-01TFC06-4"},"PeriodicalIF":0.0,"publicationDate":"2020-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88571581","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}