Pub Date : 2017-09-01DOI: 10.1109/NAP.2017.8190247
G. Bokun, V. Vikhrenko, D. di Caprio, M. Holovko
The concept of mean potentials is used for calculating the free energy and chemical potential distribution in a crystalline nonhomogeneous medium, taking into account Coulomb interactions. The lattice version of the equations determining the mean potentials is considered. The closed system of algebraic equations for the mean potentials is formulated and solved. The interparticle interaction potential is split into a short range part, screened Coulomb interaction and the rest of long range Coulomb interaction. The former two interactions are considered in detail, while the long range part is suggested to take into account in the mean spherical approximation. The chemical potential on a given site depends on the concentration distribution over the whole system.
{"title":"Chemical potential distribution of nonhomogeneous solid electrolyte","authors":"G. Bokun, V. Vikhrenko, D. di Caprio, M. Holovko","doi":"10.1109/NAP.2017.8190247","DOIUrl":"https://doi.org/10.1109/NAP.2017.8190247","url":null,"abstract":"The concept of mean potentials is used for calculating the free energy and chemical potential distribution in a crystalline nonhomogeneous medium, taking into account Coulomb interactions. The lattice version of the equations determining the mean potentials is considered. The closed system of algebraic equations for the mean potentials is formulated and solved. The interparticle interaction potential is split into a short range part, screened Coulomb interaction and the rest of long range Coulomb interaction. The former two interactions are considered in detail, while the long range part is suggested to take into account in the mean spherical approximation. The chemical potential on a given site depends on the concentration distribution over the whole system.","PeriodicalId":6516,"journal":{"name":"2017 IEEE 7th International Conference Nanomaterials: Application & Properties (NAP)","volume":"9 1","pages":"03NE16-1-03NE16-4"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82309886","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.2017.8190349
S. Nedilko, A. Slepets, T. Voitenko, O. Chukova, S. Nedilko
The Eu3+ impurity ions form two types of luminescent centres in the La1−xEuxVO4 powder samples. Crystal field calculations and analysis of crystal field parameters have shown that for the both types of centres the Eu3+ ions are under effect of the different, regular and defect, oxygen surrounding. The latter centres arise on surfaces of the particles. Increase of luminescence intensity for the samples obtained by different methods takes place in the noted order: solid state → co-precipitation → sol gel synthesis and correlates with decreasing of the particles sizes. Correlations between grain sizes and luminescence behavior of the La1−xEuxVO4 powders were studied.
{"title":"Crystal field effect on luminescent characteristics of Europium doped orthovanadate nanoparticles","authors":"S. Nedilko, A. Slepets, T. Voitenko, O. Chukova, S. Nedilko","doi":"10.1109/NAP.2017.8190349","DOIUrl":"https://doi.org/10.1109/NAP.2017.8190349","url":null,"abstract":"The Eu<sup>3+</sup> impurity ions form two types of luminescent centres in the La<inf>1−x</inf>Eu<inf>x</inf>VO<inf>4</inf> powder samples. Crystal field calculations and analysis of crystal field parameters have shown that for the both types of centres the Eu<sup>3+</sup> ions are under effect of the different, regular and defect, oxygen surrounding. The latter centres arise on surfaces of the particles. Increase of luminescence intensity for the samples obtained by different methods takes place in the noted order: solid state → co-precipitation → sol gel synthesis and correlates with decreasing of the particles sizes. Correlations between grain sizes and luminescence behavior of the La<inf>1−x</inf>Eu<inf>x</inf>VO<inf>4</inf> powders were studied.","PeriodicalId":6516,"journal":{"name":"2017 IEEE 7th International Conference Nanomaterials: Application & Properties (NAP)","volume":"40 1","pages":"02MAN04-1-02MAN04-5"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83395609","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.2017.8190215
N. Mediukh, V. Ivashchenko, V. Shevchenko
First-principals calculations were carried out in order to discover stability of the B1-SixNb1−xC solid solutions (alloys). Lattice parameter, total energy, formation energy, phonon spectra, elastic properties were investigated as functions of composition. It was found that phonon spectra for the alloys had imaginary frequencies (the range of the phonon density of states, PHDOS, with the negative wavenumbers). Also, the eigenvalues of the matrix of elastic constants were negative for some compositions. Phonon calculations for pure SiC with lattice parameters that corresponded to different alloy compositions showed that the reason for instability of some solid solutions is the dynamical instability of B1-SiC with the lattice parameters for these alloys.
{"title":"First-principles study of the stability of NbC-SiC solid solutions","authors":"N. Mediukh, V. Ivashchenko, V. Shevchenko","doi":"10.1109/NAP.2017.8190215","DOIUrl":"https://doi.org/10.1109/NAP.2017.8190215","url":null,"abstract":"First-principals calculations were carried out in order to discover stability of the B1-SixNb1−xC solid solutions (alloys). Lattice parameter, total energy, formation energy, phonon spectra, elastic properties were investigated as functions of composition. It was found that phonon spectra for the alloys had imaginary frequencies (the range of the phonon density of states, PHDOS, with the negative wavenumbers). Also, the eigenvalues of the matrix of elastic constants were negative for some compositions. Phonon calculations for pure SiC with lattice parameters that corresponded to different alloy compositions showed that the reason for instability of some solid solutions is the dynamical instability of B1-SiC with the lattice parameters for these alloys.","PeriodicalId":6516,"journal":{"name":"2017 IEEE 7th International Conference Nanomaterials: Application & Properties (NAP)","volume":"28 1","pages":"01FNC16-1-01FNC16-4"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87187130","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.2017.8190189
L. Frolova, A. Savvin, A. Derimova, O. Prokopenko
The problem of the utilization of etching solutions was investigated. The effect of different cations on colour characteristics of the pigments obtained from used etching solutions was studied. We studied the system Fe — Al — Cu. The areas of the formation of red, white, yellow and brown pigments are determined. The simplex latticed planning was used in order to make diagrams of composition and properties. Using the X-ray analysis, the phase composition of compounds that determine colour characteristics of pigments was found. The influence of heat treatment on colour characteristics of pigments was established.)
研究了蚀刻液的利用问题。研究了不同阳离子对用过的蚀刻液制备的颜料颜色特性的影响。我们研究了Fe - Al - Cu体系。确定了形成红色、白色、黄色和棕色色素的区域。采用单纯形网格规划法绘制结构和性质图。通过x射线分析，发现了决定颜料颜色特征的化合物的相组成。确定了热处理对颜料颜色特性的影响。
{"title":"Recuperation of etching solutions with obtaining pigments on the basis of ferrum oxide","authors":"L. Frolova, A. Savvin, A. Derimova, O. Prokopenko","doi":"10.1109/NAP.2017.8190189","DOIUrl":"https://doi.org/10.1109/NAP.2017.8190189","url":null,"abstract":"The problem of the utilization of etching solutions was investigated. The effect of different cations on colour characteristics of the pigments obtained from used etching solutions was studied. We studied the system Fe — Al — Cu. The areas of the formation of red, white, yellow and brown pigments are determined. The simplex latticed planning was used in order to make diagrams of composition and properties. Using the X-ray analysis, the phase composition of compounds that determine colour characteristics of pigments was found. The influence of heat treatment on colour characteristics of pigments was established.)","PeriodicalId":6516,"journal":{"name":"2017 IEEE 7th International Conference Nanomaterials: Application & Properties (NAP)","volume":"169 1","pages":"01NNPT09-1-01NNPT09-4"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89021480","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.2017.8190151
O. Khudobina, I. Fedulov
In the article there are considered corrections to the energy spectrum and wave function of a 2D electron gas with a spin-orbit interaction of the Rashba type in an external static magnetic field associated with the effect of hexagonal warping of the Fermi surface of two-dimensional electron gas in topological insulators on the basis of bismuth telluride.
{"title":"Energy spectrum of the magnetic bloch states of the 2D electron gas with spin-orbit interaction rashba-type and hexagonal warping effect","authors":"O. Khudobina, I. Fedulov","doi":"10.1109/NAP.2017.8190151","DOIUrl":"https://doi.org/10.1109/NAP.2017.8190151","url":null,"abstract":"In the article there are considered corrections to the energy spectrum and wave function of a 2D electron gas with a spin-orbit interaction of the Rashba type in an external static magnetic field associated with the effect of hexagonal warping of the Fermi surface of two-dimensional electron gas in topological insulators on the basis of bismuth telluride.","PeriodicalId":6516,"journal":{"name":"2017 IEEE 7th International Conference Nanomaterials: Application & Properties (NAP)","volume":"1 1","pages":"01PCSI14-1-01PCSI14-4"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80396747","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.2017.8190332
B. Mussabayeva, K. Murzagulova, Z. Aripzhanova, A. Klivenko
The silver and copper nanoparticles in water and ethanol extracts of some plants were synthesized by the method of “green” chemistry. The synthesized nanoparticles are studied by the methods of a spectophotometery, dynamic light scattering and their stability is studied. The possibility of reduction of the sizes of nanoparticles is shown by the method of an ultrasonic dispersion. The synthesized nanoparticles are used as carriers of new antitubercular drugs.
{"title":"Preparation of silver and copper nanoparticles for biomedical application","authors":"B. Mussabayeva, K. Murzagulova, Z. Aripzhanova, A. Klivenko","doi":"10.1109/NAP.2017.8190332","DOIUrl":"https://doi.org/10.1109/NAP.2017.8190332","url":null,"abstract":"The silver and copper nanoparticles in water and ethanol extracts of some plants were synthesized by the method of “green” chemistry. The synthesized nanoparticles are studied by the methods of a spectophotometery, dynamic light scattering and their stability is studied. The possibility of reduction of the sizes of nanoparticles is shown by the method of an ultrasonic dispersion. The synthesized nanoparticles are used as carriers of new antitubercular drugs.","PeriodicalId":6516,"journal":{"name":"2017 IEEE 7th International Conference Nanomaterials: Application & Properties (NAP)","volume":"17 1","pages":"04NB20-1-04NB20-4"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80464268","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.2017.8190257
S. Mikhaylov, A. Pud, J. Wojkiewicz, P. Coddeville
Hybrid polyaniline (PANI) nanocomposites were prepared by chemical oxidative polymerization of aniline in the presence of different metal oxide nanoparticles (TiO2 in rutile and anatase forms, SnO2). Influence of the near ultraviolet (UV) light on synthesized materials properties and possibility of polymer phase photocatalytic degradation were investigated. Specifically, we have studied the nanocomposites' properties before and after the UV exposition by UV-Vis spectroscopy, thermogravimetric analysis and conductivity measurements. The obtained results suggest that synthesized materials undergo solid-state photodegradation depending on the energy gap between PANI LUMO and metal oxides conduction band. A possible photodegradation mechanism based on the sensitizing effect by PANI is proposed.
{"title":"UV-light induced solid-phase photodegradation in PANI nanocomposites","authors":"S. Mikhaylov, A. Pud, J. Wojkiewicz, P. Coddeville","doi":"10.1109/NAP.2017.8190257","DOIUrl":"https://doi.org/10.1109/NAP.2017.8190257","url":null,"abstract":"Hybrid polyaniline (PANI) nanocomposites were prepared by chemical oxidative polymerization of aniline in the presence of different metal oxide nanoparticles (TiO2 in rutile and anatase forms, SnO2). Influence of the near ultraviolet (UV) light on synthesized materials properties and possibility of polymer phase photocatalytic degradation were investigated. Specifically, we have studied the nanocomposites' properties before and after the UV exposition by UV-Vis spectroscopy, thermogravimetric analysis and conductivity measurements. The obtained results suggest that synthesized materials undergo solid-state photodegradation depending on the energy gap between PANI LUMO and metal oxides conduction band. A possible photodegradation mechanism based on the sensitizing effect by PANI is proposed.","PeriodicalId":6516,"journal":{"name":"2017 IEEE 7th International Conference Nanomaterials: Application & Properties (NAP)","volume":"7 1","pages":"03NNSA09-1-03NNSA09-4"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89692052","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.2017.8190373
A. Maizelis
Zinc-nickel alloy films of 10–300 nm thickness were obtained by electrodeposition from a slightly alkaline polyligand ammonia-glycinate electrolyte under conditions of constant current, constant potential, and linear potential scan. The phase composition of the films was determined by the method of anodic voltammetry in an alkaline ammonia-glycinate solution. It is shown that the content of the most corrosion-resistant γ-phase in films increases with the increase in ratio of nickel and zinc ions concentration in the electrolyte, film thickness and current density above the limiting value. The parameters of contact exchange kinetics in the Zn-electrolyte system are determined. It is shown that the film of solid solution of zinc in nickel alloy with high adhesion to the substrate is deposited as a result of contact exchange. The contact exchange rate does not exceed 0.2 mA/cm2.
{"title":"Voltammetric analysis of phase composition of Zn-Ni alloy thin films electrodeposited under different electrolyze modes","authors":"A. Maizelis","doi":"10.1109/NAP.2017.8190373","DOIUrl":"https://doi.org/10.1109/NAP.2017.8190373","url":null,"abstract":"Zinc-nickel alloy films of 10–300 nm thickness were obtained by electrodeposition from a slightly alkaline polyligand ammonia-glycinate electrolyte under conditions of constant current, constant potential, and linear potential scan. The phase composition of the films was determined by the method of anodic voltammetry in an alkaline ammonia-glycinate solution. It is shown that the content of the most corrosion-resistant γ-phase in films increases with the increase in ratio of nickel and zinc ions concentration in the electrolyte, film thickness and current density above the limiting value. The parameters of contact exchange kinetics in the Zn-electrolyte system are determined. It is shown that the film of solid solution of zinc in nickel alloy with high adhesion to the substrate is deposited as a result of contact exchange. The contact exchange rate does not exceed 0.2 mA/cm2.","PeriodicalId":6516,"journal":{"name":"2017 IEEE 7th International Conference Nanomaterials: Application & Properties (NAP)","volume":"47 1","pages":"02NTF13-1-02NTF13-5"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80821201","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.2017.8190350
Y. Znamenshchykov, V. Kosyak, A. Opanasyuk, M. Kolesnyk, P. Fochuk, A. Cerskus
Thick polycrystalline Cd1−xZnxTe films were deposited by the close spaced vacuum sublimation method. Study of structural and optical properties was carried out by X-ray diffraction, Raman spectroscopy, and low temperature photoluminescence. Obtained results allowed to estimate phase composition of the films, as well as to calculate the values of band gap of the films, which was 1.97 eV and 2.13 eV for samples with x=0.48 and x=0.65 respectively.
{"title":"Structural and optical properties of Cd1−xZnxTe thick films with high zn concentrations","authors":"Y. Znamenshchykov, V. Kosyak, A. Opanasyuk, M. Kolesnyk, P. Fochuk, A. Cerskus","doi":"10.1109/NAP.2017.8190350","DOIUrl":"https://doi.org/10.1109/NAP.2017.8190350","url":null,"abstract":"Thick polycrystalline Cd1−xZnxTe films were deposited by the close spaced vacuum sublimation method. Study of structural and optical properties was carried out by X-ray diffraction, Raman spectroscopy, and low temperature photoluminescence. Obtained results allowed to estimate phase composition of the films, as well as to calculate the values of band gap of the films, which was 1.97 eV and 2.13 eV for samples with x=0.48 and x=0.65 respectively.","PeriodicalId":6516,"journal":{"name":"2017 IEEE 7th International Conference Nanomaterials: Application & Properties (NAP)","volume":"52 1","pages":"02MAN05-1-02MAN05-5"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74820144","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.2017.8190343
A. Oksanich, S. Pritchin, M. Kogdas, A. Holod, Y. Milovanov, I. Gavrilchenko
Porous GaAs was formed electrochemically on n-type GaAs in a HF:C2H5OH (1:3) electrolyte. The surface morphology of porous GaAs has been studied using interference microscope image and scanning electron microscope (SEM). The hodographs of the total impedance and the adsorption influence of ethanol and acetone vapor on the charge transfer were examined. The use of the impedance spectroscopy of porous GaAs for the detection of different gases was proposed.
{"title":"Using impedance porous GaAs-based for biomedical gas sensor","authors":"A. Oksanich, S. Pritchin, M. Kogdas, A. Holod, Y. Milovanov, I. Gavrilchenko","doi":"10.1109/NAP.2017.8190343","DOIUrl":"https://doi.org/10.1109/NAP.2017.8190343","url":null,"abstract":"Porous GaAs was formed electrochemically on n-type GaAs in a HF:C2H5OH (1:3) electrolyte. The surface morphology of porous GaAs has been studied using interference microscope image and scanning electron microscope (SEM). The hodographs of the total impedance and the adsorption influence of ethanol and acetone vapor on the charge transfer were examined. The use of the impedance spectroscopy of porous GaAs for the detection of different gases was proposed.","PeriodicalId":6516,"journal":{"name":"2017 IEEE 7th International Conference Nanomaterials: Application & Properties (NAP)","volume":"20 1","pages":"04NB31-1-04NB31-4"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75552075","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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