The temperature dependences of contact resistivity are measured for Pd/Ti/Au ohmic contacts toward Indium Nitride (with different doping level 2.0 · 1018 and 8.3 · 1018 cm−3) over the wide temperature range (4.2–380 K). The growing curves are obtained in the entire investigated temperature range for both doping level. They are explained within the mechanism of thermionic current flow through metal shunts associated with the so-called conducting dislocations. Good agreement between the theoretical and experimental dependences is obtained assuming that the flowing current is limited by total resistance of metal shunts. Moreover the effect of temperature dependence of metal resistivity on total contact resistivity was observed. The density of conducting dislocations obtained from the theory is coherent with the density of screw and edge dislocations obtained from X-ray diffraction investigation of the structure.
{"title":"Current transport through ohmic contacts to indiume nitride with high defect density","authors":"P. Sai, N. Safriuk, V. V. Shynkarenko","doi":"10.15407/FM25.03.486","DOIUrl":"https://doi.org/10.15407/FM25.03.486","url":null,"abstract":"The temperature dependences of contact resistivity are measured for Pd/Ti/Au ohmic contacts toward Indium Nitride (with different doping level 2.0 · 1018 and 8.3 · 1018 cm−3) over the wide temperature range (4.2–380 K). The growing curves are obtained in the entire investigated temperature range for both doping level. They are explained within the mechanism of thermionic current flow through metal shunts associated with the so-called conducting dislocations. Good agreement between the theoretical and experimental dependences is obtained assuming that the flowing current is limited by total resistance of metal shunts. Moreover the effect of temperature dependence of metal resistivity on total contact resistivity was observed. The density of conducting dislocations obtained from the theory is coherent with the density of screw and edge dislocations obtained from X-ray diffraction investigation of the structure.","PeriodicalId":6516,"journal":{"name":"2017 IEEE 7th International Conference Nanomaterials: Application & Properties (NAP)","volume":"18 1","pages":"02NTF03-1-02NTF03-3"},"PeriodicalIF":0.0,"publicationDate":"2018-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75961565","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 : 2017-09-01DOI: 10.1109/NAP.2017.8190265
V. Moravskyi, I. Dziaman, S. Suberliak, O. Grytsenko, M. Kuznetsova
The paper presents the results of studies on the features of obtaining of metal-filled polymer composites. In order to obtain metal-filled polymer composites, the technology of metallization of the polymeric surface of the raw material was used. The first stage of the developed technology was the activation of the surface of the initial polymeric raw material; second — the metallization of the activated surface in solutions of chemical recovery, which allows to obtain polymer composites with nano-scale metallic fillers. The obtained results allow to establish optimal conditions and to effectively influence the process of metal recovery on the activated polymer surface in solutions of chemical metallization. By changing the conditions of metal deposition on a polymer surface, it is possible to control the content, shape and size of metal particles in polymeric composites obtained from such materials and therefore to affect their properties.
{"title":"Features of the production of metal-filled composites by metallization of polymeric raw materials","authors":"V. Moravskyi, I. Dziaman, S. Suberliak, O. Grytsenko, M. Kuznetsova","doi":"10.1109/NAP.2017.8190265","DOIUrl":"https://doi.org/10.1109/NAP.2017.8190265","url":null,"abstract":"The paper presents the results of studies on the features of obtaining of metal-filled polymer composites. In order to obtain metal-filled polymer composites, the technology of metallization of the polymeric surface of the raw material was used. The first stage of the developed technology was the activation of the surface of the initial polymeric raw material; second — the metallization of the activated surface in solutions of chemical recovery, which allows to obtain polymer composites with nano-scale metallic fillers. The obtained results allow to establish optimal conditions and to effectively influence the process of metal recovery on the activated polymer surface in solutions of chemical metallization. By changing the conditions of metal deposition on a polymer surface, it is possible to control the content, shape and size of metal particles in polymeric composites obtained from such materials and therefore to affect their properties.","PeriodicalId":6516,"journal":{"name":"2017 IEEE 7th International Conference Nanomaterials: Application & Properties (NAP)","volume":"1 1","pages":"03NNSA18-1-03NNSA18-4"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74654487","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 : 2017-09-01DOI: 10.1109/NAP.2017.8190401
Yu. O. Lyashenko, V. V. Morozovich, O. Liashenko
The Lattice Monte Carlo method was used to calculate the effective diffusion in nanostructured 3D systems, comprising two-phase zones with different morphology. The results of the calculations allowed to establish and compare the dependences of effective diffusion coefficients in nanostructured two-phase systems on the volume fraction of phases. Calculations are made in the case of parallel, sequential and combined methods of phase coupling in two-phase zones of different morphology. The phenomenological parallel and serial connection models for the determination of the effective diffusion parameters of the inhomogeneous two-phase media are compared with the Monte Carlo Lattice method.
{"title":"The lattice Monte Carlo method for calculating the effective diffusivities in the nanostructured two-phase media","authors":"Yu. O. Lyashenko, V. V. Morozovich, O. Liashenko","doi":"10.1109/NAP.2017.8190401","DOIUrl":"https://doi.org/10.1109/NAP.2017.8190401","url":null,"abstract":"The Lattice Monte Carlo method was used to calculate the effective diffusion in nanostructured 3D systems, comprising two-phase zones with different morphology. The results of the calculations allowed to establish and compare the dependences of effective diffusion coefficients in nanostructured two-phase systems on the volume fraction of phases. Calculations are made in the case of parallel, sequential and combined methods of phase coupling in two-phase zones of different morphology. The phenomenological parallel and serial connection models for the determination of the effective diffusion parameters of the inhomogeneous two-phase media are compared with the Monte Carlo Lattice method.","PeriodicalId":6516,"journal":{"name":"2017 IEEE 7th International Conference Nanomaterials: Application & Properties (NAP)","volume":"66 1","pages":"02NTF21-1-02NTF21-5"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78729796","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 : 2017-09-01DOI: 10.1109/NAP.2017.8190380
M. Dub
Ohmic contacts to polycrystalline diamond thin films were formed using Au-Ti metal structure. The current-voltage characteristics of all contacts are linear and symmetric. Measured values of contact resistivity are less than 1 % of semiconductor resistivity. Essential variation of electrophysical parameters was not observed after rapid thermal annealing at 800 °C with 60 seconds duration. The thermionic emission was determined as dominant current transport mechanism through metal-diamond interface at temperatures above 190 K. The structure study was conducted by Auger profiling and X-ray diffraction analysis. The ability of using such type of ohmic contacts as temperature detectors on heat sink was discussed.
{"title":"Electrophysical parameters of Au-Ti ohmic contacts to polycrystalline diamond","authors":"M. Dub","doi":"10.1109/NAP.2017.8190380","DOIUrl":"https://doi.org/10.1109/NAP.2017.8190380","url":null,"abstract":"Ohmic contacts to polycrystalline diamond thin films were formed using Au-Ti metal structure. The current-voltage characteristics of all contacts are linear and symmetric. Measured values of contact resistivity are less than 1 % of semiconductor resistivity. Essential variation of electrophysical parameters was not observed after rapid thermal annealing at 800 °C with 60 seconds duration. The thermionic emission was determined as dominant current transport mechanism through metal-diamond interface at temperatures above 190 K. The structure study was conducted by Auger profiling and X-ray diffraction analysis. The ability of using such type of ohmic contacts as temperature detectors on heat sink was discussed.","PeriodicalId":6516,"journal":{"name":"2017 IEEE 7th International Conference Nanomaterials: Application & Properties (NAP)","volume":"29 1","pages":"02NTF22-1-02NTF22-3"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81443088","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 : 2017-09-01DOI: 10.1109/NAP.2017.8190181
A. Khomenko, D. Boyko, M. Zakharov, K. Khomenko, Ya.V. Khyzhnya
Using molecular dynamics method and CUDA-technology for software creation, we investigate tribological properties observed when aluminum atoms are deposited on a graphene layer. During the modeling of the shear of nanoparticles, consisting of aluminum atoms, various parameters are measured the total momentum of the system, the total and potential energies, the temperature, the velocity and position of the center of mass, the dimensions of the nanoparticle, friction and substrate forces acting on the particle. We make a conclusion that tribological properties of nanoparticles strongly depend on materials. Detected heterogeneous form of dependence of substrate force is saw-like. The power dependence of averaged friction force on contact area was obtained. Since peaks of radial distribution function are blurred consequently nanoparticle has amorphous or polycrystalline form.
{"title":"Molecular dynamics of aluminum nanoparticles friction on graphene","authors":"A. Khomenko, D. Boyko, M. Zakharov, K. Khomenko, Ya.V. Khyzhnya","doi":"10.1109/NAP.2017.8190181","DOIUrl":"https://doi.org/10.1109/NAP.2017.8190181","url":null,"abstract":"Using molecular dynamics method and CUDA-technology for software creation, we investigate tribological properties observed when aluminum atoms are deposited on a graphene layer. During the modeling of the shear of nanoparticles, consisting of aluminum atoms, various parameters are measured the total momentum of the system, the total and potential energies, the temperature, the velocity and position of the center of mass, the dimensions of the nanoparticle, friction and substrate forces acting on the particle. We make a conclusion that tribological properties of nanoparticles strongly depend on materials. Detected heterogeneous form of dependence of substrate force is saw-like. The power dependence of averaged friction force on contact area was obtained. Since peaks of radial distribution function are blurred consequently nanoparticle has amorphous or polycrystalline form.","PeriodicalId":6516,"journal":{"name":"2017 IEEE 7th International Conference Nanomaterials: Application & Properties (NAP)","volume":"69 1","pages":"01NNPT01-1-01NNPT01-4"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84525559","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 : 2017-09-01DOI: 10.1109/NAP.2017.8190277
E. Lobko, V. Demchenko, V. Klepko, Y. Yakovlev, E. Lysenkov
The composites based on the cross-linked polyurethane and carbon nanotubes (CPU/CNT), formed with and without electric field (EF) were obtained. The electrical and mechanical characteristics of the composites were measured. The formation of CPU/CNT systems in the EF both with vertical and horizontal orientation of nanotubes results in the significant decreasing in the values of percolation threshold (to 0.1%wt. of CNTs). The tensile strength of the CPU/CNT-EF composites increased almost to 18 MPa at the 0.1%wt. of CNTs at the vertical orientation of the nanotubes.
{"title":"The effect of the electrical field on the electrical and mechanical properties of polyurethane/carbon nanotubes composites","authors":"E. Lobko, V. Demchenko, V. Klepko, Y. Yakovlev, E. Lysenkov","doi":"10.1109/NAP.2017.8190277","DOIUrl":"https://doi.org/10.1109/NAP.2017.8190277","url":null,"abstract":"The composites based on the cross-linked polyurethane and carbon nanotubes (CPU/CNT), formed with and without electric field (EF) were obtained. The electrical and mechanical characteristics of the composites were measured. The formation of CPU/CNT systems in the EF both with vertical and horizontal orientation of nanotubes results in the significant decreasing in the values of percolation threshold (to 0.1%wt. of CNTs). The tensile strength of the CPU/CNT-EF composites increased almost to 18 MPa at the 0.1%wt. of CNTs at the vertical orientation of the nanotubes.","PeriodicalId":6516,"journal":{"name":"2017 IEEE 7th International Conference Nanomaterials: Application & Properties (NAP)","volume":"51 1","pages":"03NNSA33-1-03NNSA33-3"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80873266","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 : 2017-09-01DOI: 10.1109/NAP.2017.8190304
A. Amirov, V. Rodionov, V. Rodionova, A. Aliev
The magnetic, magnetocaloric and magnetoelectric properties of FeRh-based multiferroic composite were studied around room temperature. The maximum of magnetocaloric effect and the high magnetoelectric ordering around the antiferromagnetic-ferromagnetic phase transition temperature of 315 K for a magnetic field change of 0.62 T were observed. Applied voltage across the composite shifts the metamagnetic transition by ∼4 K in cooling and by ∼3 K in heating. The magnitudes of the magnetoelectric and magnetocaloric effects depend on the strain/stress of magnetic Fe48Rh52 layer by piezoelectric PbZr0.53Ti0.47O3 layer as results of applying electric field and can be used for controlling the magnetic properties of the caloric materials.
{"title":"Electric-field control of magnetocaloric effect in FeRh-based composite","authors":"A. Amirov, V. Rodionov, V. Rodionova, A. Aliev","doi":"10.1109/NAP.2017.8190304","DOIUrl":"https://doi.org/10.1109/NAP.2017.8190304","url":null,"abstract":"The magnetic, magnetocaloric and magnetoelectric properties of FeRh-based multiferroic composite were studied around room temperature. The maximum of magnetocaloric effect and the high magnetoelectric ordering around the antiferromagnetic-ferromagnetic phase transition temperature of 315 K for a magnetic field change of 0.62 T were observed. Applied voltage across the composite shifts the metamagnetic transition by ∼4 K in cooling and by ∼3 K in heating. The magnitudes of the magnetoelectric and magnetocaloric effects depend on the strain/stress of magnetic Fe48Rh52 layer by piezoelectric PbZr0.53Ti0.47O3 layer as results of applying electric field and can be used for controlling the magnetic properties of the caloric materials.","PeriodicalId":6516,"journal":{"name":"2017 IEEE 7th International Conference Nanomaterials: Application & Properties (NAP)","volume":"24 1","pages":"04NESP24-1-04NESP24-4"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73615517","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 : 2017-09-01DOI: 10.1109/NAP.2017.8190183
V. Omelyanenko, D. Volodin
The article deals with the main points and issues of nanoinformatics development. The main issues of the nanotechnology information managing were raised and the main problems of nanoinformatics tools development were identified. Some tools of nanoinformatics were considered. The approach for nanotechnologies application for the product development in medical sector based on neural network was presented.
{"title":"Nanoinformatics application framework for R&D and industrial analisys","authors":"V. Omelyanenko, D. Volodin","doi":"10.1109/NAP.2017.8190183","DOIUrl":"https://doi.org/10.1109/NAP.2017.8190183","url":null,"abstract":"The article deals with the main points and issues of nanoinformatics development. The main issues of the nanotechnology information managing were raised and the main problems of nanoinformatics tools development were identified. Some tools of nanoinformatics were considered. The approach for nanotechnologies application for the product development in medical sector based on neural network was presented.","PeriodicalId":6516,"journal":{"name":"2017 IEEE 7th International Conference Nanomaterials: Application & Properties (NAP)","volume":"22 1","pages":"01NNPT03-1-01NNPT03-4"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73137243","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 : 2017-09-01DOI: 10.1109/NAP.2017.8190342
R. Vasyliev, Dimitri Zubov, Anzhela Rodnichenko, O. Gubar, A. Zlatska, I. Gordienko, M. Pogorielov, V. Deineka, O. Oleshko, K. Vodsed'álková, Liliana Berezkinová
The PLA and PCL nanofibrous scaffolds were tested with use of human cultured ADSCs and DFBs and revealed to be non-cytotoxic with good cell adhesiveness properties according to Alamar Blue reduction assay and vital fluorescent combined staining with FDA/PI dyes. Thus the tested scaffolds can be recommended for other intended use for regenerative medicine modern requests.
{"title":"NanoMatrix3D® nanofibrous scaffolds for tissue engineering approaches","authors":"R. Vasyliev, Dimitri Zubov, Anzhela Rodnichenko, O. Gubar, A. Zlatska, I. Gordienko, M. Pogorielov, V. Deineka, O. Oleshko, K. Vodsed'álková, Liliana Berezkinová","doi":"10.1109/NAP.2017.8190342","DOIUrl":"https://doi.org/10.1109/NAP.2017.8190342","url":null,"abstract":"The PLA and PCL nanofibrous scaffolds were tested with use of human cultured ADSCs and DFBs and revealed to be non-cytotoxic with good cell adhesiveness properties according to Alamar Blue reduction assay and vital fluorescent combined staining with FDA/PI dyes. Thus the tested scaffolds can be recommended for other intended use for regenerative medicine modern requests.","PeriodicalId":6516,"journal":{"name":"2017 IEEE 7th International Conference Nanomaterials: Application & Properties (NAP)","volume":"13 1","pages":"04NB30-1-04NB30-3"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73408983","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 : 2017-09-01DOI: 10.1109/NAP.2017.8190203
M. Glushchenko, O. Sobol, A. Zubkov
The structure of Cu-Ta and Cu-Mo condensates obtained by electron-beam evaporation from various sources in a vacuum is studied. It is shown that alloying copper condensates with tantalum and molybdenum disperses the grain structure of the copper matrix from micro- to nanoscale dimension as a result of the formation of grain boundary segregations by these elements that are formed on the surface of growing grains of copper matrix. Initial grain structure of alloyed condensates is retained to a temperature of ∼ 900°C.
{"title":"On the increase in the recrystallization temperature of nanostructured vacuum copper based condensates","authors":"M. Glushchenko, O. Sobol, A. Zubkov","doi":"10.1109/NAP.2017.8190203","DOIUrl":"https://doi.org/10.1109/NAP.2017.8190203","url":null,"abstract":"The structure of Cu-Ta and Cu-Mo condensates obtained by electron-beam evaporation from various sources in a vacuum is studied. It is shown that alloying copper condensates with tantalum and molybdenum disperses the grain structure of the copper matrix from micro- to nanoscale dimension as a result of the formation of grain boundary segregations by these elements that are formed on the surface of growing grains of copper matrix. Initial grain structure of alloyed condensates is retained to a temperature of ∼ 900°C.","PeriodicalId":6516,"journal":{"name":"2017 IEEE 7th International Conference Nanomaterials: Application & Properties (NAP)","volume":"44 1","pages":"01FNC11-1-01FNC11-4"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80091450","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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