Pub Date : 2017-09-01DOI: 10.1109/NAP.2017.8190156
P. Sai, N. Safriuk, V. V. Shynkarenko
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":"10.1109/NAP.2017.8190156","DOIUrl":"https://doi.org/10.1109/NAP.2017.8190156","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":"1 1","pages":"01PCSI20-1-01PCSI20-3"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91359607","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.2017.8190300
V. Konchenkov, D. V. Zavay'lov, S. Kryuchkov
Superlattice model consisting of alternating strips of single-layer and two-layer graphene is proposed. Using the transfer matrix method, a dispersion relation is derived. Based on the numerical analysis of the dispersion relation, graphs of the dependence of the electron energy on the components of its quasimomentum are plotted.
{"title":"Energy spectrum of the superlattice consisting of the alternating strips of one-layer and two-layer graphene","authors":"V. Konchenkov, D. V. Zavay'lov, S. Kryuchkov","doi":"10.1109/NAP.2017.8190300","DOIUrl":"https://doi.org/10.1109/NAP.2017.8190300","url":null,"abstract":"Superlattice model consisting of alternating strips of single-layer and two-layer graphene is proposed. Using the transfer matrix method, a dispersion relation is derived. Based on the numerical analysis of the dispersion relation, graphs of the dependence of the electron energy on the components of its quasimomentum are plotted.","PeriodicalId":6516,"journal":{"name":"2017 IEEE 7th International Conference Nanomaterials: Application & Properties (NAP)","volume":"20 1","pages":"04NESP15-1-04NESP15-5"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81015886","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.2017.8190388
A. Shypylenko, M. Lisovenko, K. Belovol, P. Konarski, Viacheslav Beresniev
In the present work, multifunctional Ti-Hf-Si-N coatings have been deposited using CAVD method with the aim of studying their chemical, physical, structural and mechanical properties. The results demonstrated that coating was a two-phase, nanostructured nc-(Ti, Hf)N and α-Si3N4. Sizes of substitution solid solution nanograins changed from 3.8 to 6.5 nm, and an interface thickness surrounding α-Si3N4 varied from 1.2 to 1.8 nm. Coatings hardness, which was measured by nanoindentation was from 42.7 GPa to 48.6 GPa, and an elastic modulus was E = (450 to 515) GPa.
{"title":"Effect of Hf addition and deposition condition on the structure and properties of the Ti-Hf-Si-N coatings","authors":"A. Shypylenko, M. Lisovenko, K. Belovol, P. Konarski, Viacheslav Beresniev","doi":"10.1109/NAP.2017.8190388","DOIUrl":"https://doi.org/10.1109/NAP.2017.8190388","url":null,"abstract":"In the present work, multifunctional Ti-Hf-Si-N coatings have been deposited using CAVD method with the aim of studying their chemical, physical, structural and mechanical properties. The results demonstrated that coating was a two-phase, nanostructured nc-(Ti, Hf)N and α-Si3N4. Sizes of substitution solid solution nanograins changed from 3.8 to 6.5 nm, and an interface thickness surrounding α-Si3N4 varied from 1.2 to 1.8 nm. Coatings hardness, which was measured by nanoindentation was from 42.7 GPa to 48.6 GPa, and an elastic modulus was E = (450 to 515) GPa.","PeriodicalId":6516,"journal":{"name":"2017 IEEE 7th International Conference Nanomaterials: Application & Properties (NAP)","volume":"17 1","pages":"02NTF32-1-02NTF32-5"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76770551","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.2017.8190232
Y. Tur, E. Lusakowska, G. Luka, P. Potera, I. Virt
Three lead chalcogenide films, PbTe, PbSe, and PbS, with a high structural quality were grown by pulsed lased deposition. The films were grown on single crystal substrates (Si, KCl, Al2O3) and on Si covered with a Si3N4 buffer layer. The Si3N4 layer latter facilitated the lead chalcogenide layer nucleation during the first growth stages and resulted in a more homogeneous surface morphology and a lower surface roughness. The surface geometry (roughness) of the films grown on Si3N4 was studied by means of the power spectral density analysis.
{"title":"Lead chalcogenide films grown by pulsed laser deposition","authors":"Y. Tur, E. Lusakowska, G. Luka, P. Potera, I. Virt","doi":"10.1109/NAP.2017.8190232","DOIUrl":"https://doi.org/10.1109/NAP.2017.8190232","url":null,"abstract":"Three lead chalcogenide films, PbTe, PbSe, and PbS, with a high structural quality were grown by pulsed lased deposition. The films were grown on single crystal substrates (Si, KCl, Al<inf>2</inf>O<inf>3</inf>) and on Si covered with a Si<inf>3</inf>N<inf>4</inf> buffer layer. The Si<inf>3</inf>N<inf>4</inf> layer latter facilitated the lead chalcogenide layer nucleation during the first growth stages and resulted in a more homogeneous surface morphology and a lower surface roughness. The surface geometry (roughness) of the films grown on Si<inf>3</inf>N<inf>4</inf> was studied by means of the power spectral density analysis.","PeriodicalId":6516,"journal":{"name":"2017 IEEE 7th International Conference Nanomaterials: Application & Properties (NAP)","volume":"139 1","pages":"03NE01-1-03NE01-3"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78503174","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.2017.8190386
Y. Pashkevich, A. Prudnikov, K. Lamonova, M. Pas'ko
High argon and nitrogen gas pressure and low plasma power has been used to produce carbon nitride (CNx) and nickel carbon nitride (Ni@CNx) films by reactive dc magnetron sputtering. Under these conditions, the growth of the film occurs as a process of precipitation of clusters of sputtered material, rather than individual atoms. Scanning electron microscopy and high-resolution x-ray photoemission spectroscopy were used for structural characterization of CNx films on quartz substrates. The corresponding structural diagram determined by the substrate temperature and nitrogen concentration in the CNx film has been built. It includes four main nanostructures: graphite-like, fullerene-like, diamond-like and nano columnar. Production conditions of core/shell (nickel/carbon-nitride) nanocolumnar structures have been discussed.
{"title":"Nanocluster's magnetron sputtering of carbon-nitride and hybrid nickel-carbon-nitride films","authors":"Y. Pashkevich, A. Prudnikov, K. Lamonova, M. Pas'ko","doi":"10.1109/NAP.2017.8190386","DOIUrl":"https://doi.org/10.1109/NAP.2017.8190386","url":null,"abstract":"High argon and nitrogen gas pressure and low plasma power has been used to produce carbon nitride (CNx) and nickel carbon nitride (Ni@CNx) films by reactive dc magnetron sputtering. Under these conditions, the growth of the film occurs as a process of precipitation of clusters of sputtered material, rather than individual atoms. Scanning electron microscopy and high-resolution x-ray photoemission spectroscopy were used for structural characterization of CNx films on quartz substrates. The corresponding structural diagram determined by the substrate temperature and nitrogen concentration in the CNx film has been built. It includes four main nanostructures: graphite-like, fullerene-like, diamond-like and nano columnar. Production conditions of core/shell (nickel/carbon-nitride) nanocolumnar structures have been discussed.","PeriodicalId":6516,"journal":{"name":"2017 IEEE 7th International Conference Nanomaterials: Application & Properties (NAP)","volume":"18 1","pages":"02NTF30-1-02NTF30-4"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83403061","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.2017.8190262
A. Voznyak, A. Vozniak, Yuliia Goriainova, Yu. V. Voznyak
Through the example of polylactide (PLA) and poly (1,4-butylene succinate) (PBS), the possibility of making sustainable “green nanocomposites” by slit die extrusion process in a single screw extruder has been investigated. The main feature of the received structures is the formation of stable shear bands. Their role in the crazing development and their mutual interaction under uniaxial tension for PLA and PLA/PBS composite was investigated by in-situ tensile testing in the SEM experiments. It has been established that pre-existing shear bands contributes to ductility by blocking and diffusing standard craze growth. Moreover, PBS nanofibers, formed by extrusion, additionally confer to ductile character of PLA/PBS composites by providing pre-existing shear bands and craze rotation. Tensile experiments revealed an essential growth of ductility and retaining of high strength and stiffness of the extruded PLA and PLA/PBS composite.
{"title":"Green polymer nanocomposites: Formation via plastic deformation, structure, properties and new application opportunities","authors":"A. Voznyak, A. Vozniak, Yuliia Goriainova, Yu. V. Voznyak","doi":"10.1109/NAP.2017.8190262","DOIUrl":"https://doi.org/10.1109/NAP.2017.8190262","url":null,"abstract":"Through the example of polylactide (PLA) and poly (1,4-butylene succinate) (PBS), the possibility of making sustainable “green nanocomposites” by slit die extrusion process in a single screw extruder has been investigated. The main feature of the received structures is the formation of stable shear bands. Their role in the crazing development and their mutual interaction under uniaxial tension for PLA and PLA/PBS composite was investigated by in-situ tensile testing in the SEM experiments. It has been established that pre-existing shear bands contributes to ductility by blocking and diffusing standard craze growth. Moreover, PBS nanofibers, formed by extrusion, additionally confer to ductile character of PLA/PBS composites by providing pre-existing shear bands and craze rotation. Tensile experiments revealed an essential growth of ductility and retaining of high strength and stiffness of the extruded PLA and PLA/PBS composite.","PeriodicalId":6516,"journal":{"name":"2017 IEEE 7th International Conference Nanomaterials: Application & Properties (NAP)","volume":"6 1","pages":"03NNSA14-1-03NNSA14-4"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73246881","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.2017.8190415
I. Baraban, A. Litvinova, V. Rodionova
Experimental study of the magnetic properties of amorphous ferromagnetic glass-coated microwires includes usually four types of measurements: magnetic field dependence of the velocity of the domain wall propagation by Sixtus-Tonks method, the hysteresis loops by induction or vibrating sample magnetometry methods and both measurements of the local nucleation fields distribution and magnetostriction coefficient — using special custom devices. In this paper we are demonstrating application of these techniques to study the archetypic amorphous glass-covered microwire with Fe77.5Si7.5B15 composition (14 μm diameter of metallic core and 28 μm full diameter) and briefly review a process of preparation and a typical initial characterization.
{"title":"Amorphous ferromagnetic microwires: Methods of fabrication and measurements of the magnetic properties","authors":"I. Baraban, A. Litvinova, V. Rodionova","doi":"10.1109/NAP.2017.8190415","DOIUrl":"https://doi.org/10.1109/NAP.2017.8190415","url":null,"abstract":"Experimental study of the magnetic properties of amorphous ferromagnetic glass-coated microwires includes usually four types of measurements: magnetic field dependence of the velocity of the domain wall propagation by Sixtus-Tonks method, the hysteresis loops by induction or vibrating sample magnetometry methods and both measurements of the local nucleation fields distribution and magnetostriction coefficient — using special custom devices. In this paper we are demonstrating application of these techniques to study the archetypic amorphous glass-covered microwire with Fe77.5Si7.5B15 composition (14 μm diameter of metallic core and 28 μm full diameter) and briefly review a process of preparation and a typical initial characterization.","PeriodicalId":6516,"journal":{"name":"2017 IEEE 7th International Conference Nanomaterials: Application & Properties (NAP)","volume":"25 1","pages":"02MFPM10-1-02MFPM10-5"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87457314","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.2017.8190195
Yaroslav O. Kravchenko, V. Borysiuk, A. Pogrebnjak, M. Kylyshkanov, I. Iatsunskyi, K. Smyrnova
We consider the possibilities of synthesis of multielement nanoscale coatings by structural engeneering. Obtained nitride coating (TiAlSiY)N was compared to four-component alloy TiAlSiY to estimate the influence of the reaction gas on the structural-phase composition and mechanical parameters. Investigation of deposited coatings were performed within X-ray diffraction (XRD), scanning electron microscopy (SEM), and hardness measurement techniques. Three-dimensional numerical model of the TiN phase was created for visualization of the atomic structure of the obtained coating (TiAlSiY)N. Size of the crystallites was calculated within the Debye-Scherrer method.
{"title":"Characteristics of Arc-PVD TiAlSiY and (TiAlSiY)N coatings","authors":"Yaroslav O. Kravchenko, V. Borysiuk, A. Pogrebnjak, M. Kylyshkanov, I. Iatsunskyi, K. Smyrnova","doi":"10.1109/NAP.2017.8190195","DOIUrl":"https://doi.org/10.1109/NAP.2017.8190195","url":null,"abstract":"We consider the possibilities of synthesis of multielement nanoscale coatings by structural engeneering. Obtained nitride coating (TiAlSiY)N was compared to four-component alloy TiAlSiY to estimate the influence of the reaction gas on the structural-phase composition and mechanical parameters. Investigation of deposited coatings were performed within X-ray diffraction (XRD), scanning electron microscopy (SEM), and hardness measurement techniques. Three-dimensional numerical model of the TiN phase was created for visualization of the atomic structure of the obtained coating (TiAlSiY)N. Size of the crystallites was calculated within the Debye-Scherrer method.","PeriodicalId":6516,"journal":{"name":"2017 IEEE 7th International Conference Nanomaterials: Application & Properties (NAP)","volume":"39 1","pages":"01FNC02-1-01FNC02-4"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81554655","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.2017.8190404
Julian Gonzalez, M. Ipatov, V. Zhukova, A. Zhukov
Here we propose a principle of a current controlled magnetic memory device based on magnetoimpedance (MI) effect in a conductor with inclined anisotropy easy axis. It was demonstrated that the surface magnetization can be switched controllably between two stable states by applying current pulses, and the magnetization state can be detected by sensing the impedance.
{"title":"Current controlled magnetic memory based on hysteretic switching of impedance in conductor with inclined anisotropy easy axis","authors":"Julian Gonzalez, M. Ipatov, V. Zhukova, A. Zhukov","doi":"10.1109/NAP.2017.8190404","DOIUrl":"https://doi.org/10.1109/NAP.2017.8190404","url":null,"abstract":"Here we propose a principle of a current controlled magnetic memory device based on magnetoimpedance (MI) effect in a conductor with inclined anisotropy easy axis. It was demonstrated that the surface magnetization can be switched controllably between two stable states by applying current pulses, and the magnetization state can be detected by sensing the impedance.","PeriodicalId":6516,"journal":{"name":"2017 IEEE 7th International Conference Nanomaterials: Application & Properties (NAP)","volume":"3 1","pages":"02MFPM01-1-02MFPM01-4"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76985403","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.2017.8190358
O. Lukianova, V. V. Krasil’nikov, A. N. Khmara, A. Parkhomenko
Investigation of the stress distribution in the disk sample by finite element method was carried out. A close coincidence of the experimental data with the presented model was found. Pleminary results are reported in this paper. Such physical properties as surface porosity and density are also discussed. It is shown that produced ceramics destroyed uniformly after uniaxial compression tests.
{"title":"Finite element model of mechanical tests of pressureless sintered silicon nitride","authors":"O. Lukianova, V. V. Krasil’nikov, A. N. Khmara, A. Parkhomenko","doi":"10.1109/NAP.2017.8190358","DOIUrl":"https://doi.org/10.1109/NAP.2017.8190358","url":null,"abstract":"Investigation of the stress distribution in the disk sample by finite element method was carried out. A close coincidence of the experimental data with the presented model was found. Pleminary results are reported in this paper. Such physical properties as surface porosity and density are also discussed. It is shown that produced ceramics destroyed uniformly after uniaxial compression tests.","PeriodicalId":6516,"journal":{"name":"2017 IEEE 7th International Conference Nanomaterials: Application & Properties (NAP)","volume":"459 1","pages":"02MAN13-1-02MAN13-4"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78298820","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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