I. Izhnin, I. Syvorotka, K. Lozovoy, A. Kokhanenko, A. Voitsekhovskii
{"title":"Influence of Direct Impingement of Atoms Onto the Islands During the Stranski-Krastanow Growth","authors":"I. Izhnin, I. Syvorotka, K. Lozovoy, A. Kokhanenko, A. Voitsekhovskii","doi":"10.1109/NAP.2018.8914819","DOIUrl":"https://doi.org/10.1109/NAP.2018.8914819","url":null,"abstract":"In this paper influence of direct impingement of adatoms onto the growing islands during the Stranski-Krastanow growth of epitaxial layers and 3D islands is considered. For the calculations of the critical thickness of the transition from 2D to 3D growth in this paper a theoretical model based on general nucleation theory is proposed. This model is specified by taking into account the direct impingement of adatoms onto the surface of the wetting layer. As a result, time of atoms incorporation to an island and island nucleation rate, as well as dependencies of islands array parameters on the deposition rate and growth temperature are obtained. It is shown, that for high growth rates processes of the direct impingement may become prominent and intensely affect the nucleation and growth of quantum dots.","PeriodicalId":239169,"journal":{"name":"2018 IEEE 8th International Conference Nanomaterials: Application & Properties (NAP)","volume":"126 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132646732","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":"Nano-polishing of the Surface of a Quartz Substrate Using an Evanescent Wave","authors":"D. Vasylenko, P. Kravchuk, V. Grygoruk","doi":"10.1109/NAP.2018.8915050","DOIUrl":"https://doi.org/10.1109/NAP.2018.8915050","url":null,"abstract":"Optical near-field nano-polishing of the surface of a quartz substrate using dipole-dipole interaction of atomic chlorine with quartz particles is studied. A method to obtain atomic chlorine by the local photodissociation of the hypochlorite anion by the optical near-field of the quartz substrate nano-inhomogeneities is proposed. The polarization of chlorine atoms and quartz particles by means of an evanescent wave, which is generated on the substrate surface, is investigated. A method is proposed to obtain the most optimal orientation of the dipoles of atomic chlorine and quartz particles, using the features of the optical near-field, to maximally efficiently destroy the quartz substrate nano-inhomogeneities. The surface roughness of the quartz substrate was significantly reduced by using the proposed nano-polishing method for 20 minutes: $R_{mathrm{a}}$ from 56.33 nm to 27.33 nm (by 51.48%), $R_{mathrm{z}}$ from 247.51 nm to 138.51 nm (by 44.04%) and $R_{max}$ from 317.22 nm to 156.22 nm (by 50.75%). The near-field nano-localization of photochemical etching processes theoretically has no dimensional limitations up to the size of single atoms. The use of an optical near field (including an evanescent wave) allows the nano-localization of chemical reactions. This method can be used in nanochemistry and nanotechnology.","PeriodicalId":239169,"journal":{"name":"2018 IEEE 8th International Conference Nanomaterials: Application & Properties (NAP)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133936209","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}
N. Andrushchak, D. Vynnyk, A. Andrushchak, V. Haiduchok, Y. Zhydachevskyy, M. Kushlyk
{"title":"Optical Properties of Nanoporous Al2O3 Matrices with Ammonium Dihydrogen Phosphate Crystals in Nanopores","authors":"N. Andrushchak, D. Vynnyk, A. Andrushchak, V. Haiduchok, Y. Zhydachevskyy, M. Kushlyk","doi":"10.1109/NAP.2018.8915366","DOIUrl":"https://doi.org/10.1109/NAP.2018.8915366","url":null,"abstract":"In this paper, the technology of growing ammonium dihydrogen phosphate (ADP) crystals in pores of nanoporous aluminum oxide (Al<inf>2</inf>O<inf>3</inf>) matrices was presented. On the grown nanocomposites, the optical properties of such structures were studied. In particular, the direct and diffuse optical transmission, as well as specular reflection of Al<inf>2</inf>O<inf>3</inf>matrices with ADP crystals grown in nanopores, were analyzed. From the performed experimental studies, it can be concluded that the transmission and scattering of pure Al<inf>2</inf>O<inf>3</inf>porous matrices and with ADP crystals in nanopores depends largely on the properties of the Al<inf>2</inf>O<inf>3</inf>matrices and the technology of their production.","PeriodicalId":239169,"journal":{"name":"2018 IEEE 8th International Conference Nanomaterials: Application & Properties (NAP)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115179735","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}
G. Lisachuk, R. Kryvobok, O. Lapuzina, M. S. Maystat, N.A. Kryvobok, V.V. Voloshuk, I. O. Gusarova
{"title":"To the Problem of the Creation of High-Temperature Radio-Absorbing Composite Ceramic Materials","authors":"G. Lisachuk, R. Kryvobok, O. Lapuzina, M. S. Maystat, N.A. Kryvobok, V.V. Voloshuk, I. O. Gusarova","doi":"10.1109/NAP.2018.8914804","DOIUrl":"https://doi.org/10.1109/NAP.2018.8914804","url":null,"abstract":"The main directions in the creation of high-temperature radio-absorbing ceramic materials that can be used to create new functional materials for space, aerospace, electronic engineering and in medicine are considered in the article. A well-founded choice of a high-temperature dielectric matrix and ferroelectric additive for obtaining a gradient composite radio-absorbing material is carried out. The results of studies of the ferroelectric impurities concentration influence on the physical and dielectric properties of composite ceramics obtained for ceramic technology are presented. Based on the studies of the phase composition and microstructure of the composite ceramics compositions studied, it was possible to establish a relationship between the properties, the phase composition and the structure of the obtained ceramic materials with different values of the dielectric constant.","PeriodicalId":239169,"journal":{"name":"2018 IEEE 8th International Conference Nanomaterials: Application & Properties (NAP)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114213305","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}
T. Bulavinets, V. Varyshchuk, S. Malynych, R. Lesyuk, Y. Bobitski, A. Barylyak
{"title":"Formation of Silver Colloids by Photostimulated Reduction","authors":"T. Bulavinets, V. Varyshchuk, S. Malynych, R. Lesyuk, Y. Bobitski, A. Barylyak","doi":"10.1109/NAP.2018.8915048","DOIUrl":"https://doi.org/10.1109/NAP.2018.8915048","url":null,"abstract":"In this work the effectiveness of electromagnetic radiation for the formation of spherical silver nanoparticles in water solution is studied. Silver nanoparticles colloid was synthesized by photostimulated reduction of Ag ions in silver salt aqueous solution stabilized by sodium citrate. The formation of silver nanoparticles in test solution was confirmed by spectrophotometry. The elemental composition of the silver colloid obtained by photoreduction technique was defined. The size and shape of the formed nanoparticles was determined by transmission electron microscope (TEM). Besides, the theoretical modeling of spectral characteristics were carried out by dipole equivalence method and discrete dipole approximation (DDA). It is shown that electromagnetic irradiation is promising approach for the formation of spherical silver nanoparticles in solution.","PeriodicalId":239169,"journal":{"name":"2018 IEEE 8th International Conference Nanomaterials: Application & Properties (NAP)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115764904","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":"Conductivity in Size Quantized Systems: Consideration of the Scattering of Carriers on the Surface in the Case of the δ-shaped Fluctuation of the Surface","authors":"S. Karapetyan, N. Kostyukevich, É. P. Sinyavskiĭ","doi":"10.1109/NAP.2018.8914961","DOIUrl":"https://doi.org/10.1109/NAP.2018.8914961","url":null,"abstract":"Using the Cubo formula the electric conductivity of size-quantized systems (quantum wells, nanowires) are calculated taking into account the scattering processes carrier on the interface roughness in a magnetic field. The mobility dependence for the degenerated and nondegenerate size-quantized systems on a magnetic field is investigated. The dependence of electrical conductivity and chemical potential taking into account the processes of scattering of carriers on roughnesses of a surface from magnitude and a magnetic field direction is studied; basic distinction of behavior of relative electrical conductivity in longitudinal magnetic field from behavior in cross-section magnetic field is marked.","PeriodicalId":239169,"journal":{"name":"2018 IEEE 8th International Conference Nanomaterials: Application & Properties (NAP)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115406643","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}
M. Lakusta, I. Danilenko, G. Volkova, L. Loladze, T. Konstantinova
{"title":"The SiO2 and GeO2 Additives Impact on the Sintering Kinetics of Tetragonal Zirconia Nanopowders","authors":"M. Lakusta, I. Danilenko, G. Volkova, L. Loladze, T. Konstantinova","doi":"10.1109/NAP.2018.8915192","DOIUrl":"https://doi.org/10.1109/NAP.2018.8915192","url":null,"abstract":"The impact of a small amount SiO2, GeO2 additives on the kinetics of the initial sintering stage of tetragonal zirconia nanopowders (3Y-TZP) has been investigated. It was shown a significant influence of additives on phase composition, crystallite size, agglomeration degree and the sintering mechanisms of the initial sintering stage of zirconia nanopowders. The sintering behavior of 3Y-TZP (ZrO2-3 mol%Y2O3) with and without a small amount of 1 wt % of SiO2, GeO2 additives using the dilatometric data obtained from the non-isothermal shrinkage measurements and analytical constant rate of heating (CRH) method was investigated. It was found the different influence of additives on the diffusion mechanisms in 3Y-TZP. Predominant sintering mechanism was changed by addition 1 wt% SiO2 from volume diffusion mechanism to the grain boundary diffusion mechanism that accompanied by activation energy increasing. In case of GeO2 addition the sintering process was significantly accelerated due to the activation energy reducing.","PeriodicalId":239169,"journal":{"name":"2018 IEEE 8th International Conference Nanomaterials: Application & Properties (NAP)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123310684","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}
A. Tereshchenko, V. Smyntyna, M. Bechelany, A. Konup, I. Konup, U. Samukaite-Bubniene
{"title":"Optical Immunosensor Based on Nanostructured ZnO Thin Films for Agricultural Purposes","authors":"A. Tereshchenko, V. Smyntyna, M. Bechelany, A. Konup, I. Konup, U. Samukaite-Bubniene","doi":"10.1109/NAP.2018.8915007","DOIUrl":"https://doi.org/10.1109/NAP.2018.8915007","url":null,"abstract":"― Optical, structural and adsorptional properties of ZnO nanostructured thin films have been studied for the development of highly sensitive optical immunosensor. Photoluminescent properties of ZnO thin films, deposited by atomic layer deposition (ALD) on the silicon substrates were applied for determination of Grapevine virus A-type proteins (GVA-antigens). The immobilization of anti-GVA antibodies on the surface of ZnO films resulted in the increase of photoluminescence intensity of NBE peak of ZnO and appearance of new photoluminescence band in the region of 400–550 nm. The GVA-antigen detection was performed by the evaluation of changes and behavior of a photoluminescence band around 425 nm appeared after immobilization of GVA antibodies on the surface of ZnO thin films. The sensitivity of the obtained label-free biosensor towards GVA-antigens was in the range from 1 pg/ml to 10 ng/ml. The possibility to detect GVA-antigens without additional labels (e.g enzymes or fluorescent dyes) has been demonstrated. Some aspects of the mechanism of interaction between ZnO and $mathrm{TiO}_{2}$ nanostructures and proteins are discussed.","PeriodicalId":239169,"journal":{"name":"2018 IEEE 8th International Conference Nanomaterials: Application & Properties (NAP)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123629703","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}
Y. Husak, O. Solodovnik, M. Pogorielov, A. Yanovska, Viktoriia Komiienko, Yevhenii Kozik, I. Liubchak, O. Mishchenko, Yevhen Zinchenko
{"title":"Corrosion and Biocompatibility Improvement of HA-Coated Magnesium-Based Alloys as Bone Implant Materials","authors":"Y. Husak, O. Solodovnik, M. Pogorielov, A. Yanovska, Viktoriia Komiienko, Yevhenii Kozik, I. Liubchak, O. Mishchenko, Yevhen Zinchenko","doi":"10.1109/NAP.2018.8914978","DOIUrl":"https://doi.org/10.1109/NAP.2018.8914978","url":null,"abstract":"Magnesium alloys attract great attention as prospective bone implants due to their biocompatibilities, physical properties and an ability to degrade completely under physiological conditions, what eliminates the need for surgical reintervention. The main problem of developing advanced Mg alloys for medical application is matching degradation with tissue healing rate. Orthopaedic metallic implants should maintain its mechanical property for at least 3 month to avoid the second fracture occurrence resulting from their fast degradation. The purpose of this research was assessment of in-vitro corrosion and surface morphology after short term in-vivo implantation of Mg based implant covered by HA.Mg alloys with the addition of Zr(0,65%), Al(1,85%) and Nd(1,25%) were used. Ca-P-based coatings were used to improve the corrosion resistance of magnesium and its alloys as well as their surface bioactivity. Hydroxyapatite (HA) coatings were obtained on Mg alloy substrates by dipping method. Simulated body fluid (SBF; pH 7,4) with ion concentrations approximately equal to those of human blood plasma resembling physiological conditions and citrate buffer with pH 5 - simulating inflammation were selected as modeling environments for in-vitro degradation test. The rod samples were implanted into the tibia bone of rats and after 1 and 5 days of implantation were taken out to observe cells adhesion on surface samples. SEM was used to assess surface morphology after in-vitro and in-vivo tests. We determined different mechanisms of HA layer corrosion - SBF solution causes the partial dissolution, while citrate solution caused complete disappearance of the coating. HA coated layer coused lower degradaion without significant pH change during the static immersion test in SBF and citrate buffer. The HA coating favored cell adhesion and rapid fibrous tissue formation.","PeriodicalId":239169,"journal":{"name":"2018 IEEE 8th International Conference Nanomaterials: Application & Properties (NAP)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121049266","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":"Carbon Nanomaterials from Coal Pyrolysis Products","authors":"L. Kieush, A. Starovoit","doi":"10.1109/NAP.2018.8915065","DOIUrl":"https://doi.org/10.1109/NAP.2018.8915065","url":null,"abstract":"The publication reveals the possibility of using coal pyrolysis products to produce various carbon materials via a plasma arc method, such as carbon nanotubes, carbon nanoparticles and carbon whiskers.","PeriodicalId":239169,"journal":{"name":"2018 IEEE 8th International Conference Nanomaterials: Application & Properties (NAP)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123885891","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}