Перегляд за Автор "Hrinevych, Viktor S."

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    Atom Force Microscopy of SnO2 Nano Layers
    (2006) Filevska, Liudmila M.; Smyntyna, Valentyn A.; Hrinevych, Viktor S.
    The gas sensitivity applied problems solutions need a consideration and detailed investigation of the material's electronic and ionic subsystems' behavior. These systems' behavior at their own turn is tightly connected with the structure and morphology of surfaces. The morphology investigations results are given for the SnO2 layers obtained with the polymers usage.
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    Binary oxides semiconductor transducers for H2S sensors
    (1997) Smyntyna, Valentyn A.; Vashpanov Yu. A.; Hrinevych, Viktor S.
    The physical processes of semiconductor and heavy metals oxides sensors on H2S are investigated and possible physical mechanisms of gas sensitivity in the atmosphere of air and nitrogen are considered. Mechanism of adsorbtive-desorbtive sensitivity of heterostuctures to H 2S is connected with conductivity variation caused by the hydrogen atoms diffusion to the boundaries.
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    Characterization of SnO2 Sensors Nanomaterials by Polarization Modulation Method
    (2016) Hrinevych, Viktor S.; Filevska, Liudmila M.; Smyntyna, Valentyn A.; Stetsenko, Maksym O.; Rudenko, S. P.; Maksymenko, L. S.; Serdeha, B. K.
    The polarization characteristics for tin dioxide cluster films are studied by the method of modulation polarization spectroscopy. The galvanic conductivity presence in the films is the basis for registration in it the surface plasmon resonances. The spectral characteristics analysis by means of expansion in terms of Gauss components for the Stocks vector Q component of the probe radiation gave the parameters of the revealed resonances. The resonance excitation of polaritons and localized surface plasmons is established. The dispersion characteristics of nonradiative modes of surface plasmons are obtained which matches the cluster film structure. The numerical values comparison for resonances relaxation constants leads to the conclusion of application of one of them in sensors.
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    Characterization of SnO2 Sensors Nanomaterials by Polarization Modulation Method
    (2016-01) Hrinevych, Viktor S.; Filevska, Liudmila M.; Smyntyna, Valentyn A.; Stetsenko, Maksym O.; Rudenko, S. P.; Maksymenko, L. S.
    The polarization characteristics for tin dioxide cluster films are studied by the method of modulation polarization spectroscopy. The galvanic conductivity presence in the films is the basis for registration in it the surface plasmon resonances. The spectral characteristics analysis by means of expansion in terms of Gauss components for the Stocks vector Q component of the probe radiation gave the parameters of the revealed resonances. The resonance excitation of polaritons and localized surface plasmons is established. The dispersion characteristics of non-radiative modes of surface plasmons are obtained which matches the cluster film structure. The numerical values comparison for resonances relaxation constants leads to the conclusion of application of one of them in sensors.
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    Classic and Topologic Dimensional Effects in SnO2 Thin Films Detected by Surface Plasmon Resonance Technique
    (SciTechnol, 2013) Hrinevych, Viktor S.; Filevska, Liudmila M.; Maximenko, L. S.; Matiash, I. E.; Mischuk, O. N.; Rudenko, S. P.; Serdeha, B. K.; Smyntyna, Valentyn A.
    Internal reflection features caused by the surface plasmon resonance in nanoscale films containing defect tin dioxide clusters in the stoichiometric dielectric matrix are studied by means of polarization modulation of electromagnetic radiation. The angular and spectral characteristics of reflectances Rs2 and Rp2 of s- and p-polarized radiation and their polarization difference ρ=Rs2–Rp2 are measured in the wavelength range λ=400-1600 nm. The obtained experimental characteristics ρ(θ, λ) (θ is the radiation incidence angle) represent the optical property features associated with the film structure and morphology. Surface plasmon polaritons and local plasmons excited by s- and p-polarized radiation are detected; their frequency and relaxation properties are determined. The technique employed for studying surface plasmon resonance in tin dioxide films is appeared to be structurally sensitiv
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    Electrophysical properties of zinc oxide thin films obtained by chemical methods
    (Одеський національний університет імені І. І. Мечникова, 2019) Bulyga, Y. I.; Chebanenko, Anatoliy P.; Hrinevych, Viktor S.; Filevska, Liudmila M.; Булига, Ю. І.; Чебаненко, Анатолій Павлович; Гріневич, Віктор Сергійович; Філевська, Людмила Миколаївна; Булыга, Ю. И.; Чебаненко, Анатолий Павлович; Гриневич, Виктор Сергеевич; Филевская, Людмила Николаевна
    The electrophysical characteristics comparative studies were carried out for ZnO films obtained by chemical precipitation from zinc acetate solutions and thermal oxidation of zinc films. The ZnO films showed optical absorption and band gap (2.9 to 3.2 eV) specific for this material, which indicates the presence of crystalline structure in them. The use of polyvinyl alcohol made it possible to obtain samples with the highest values of E g and electrical resistance, which is caused by the nanosize crystallites of the films. The investigated electrophysical characteristics of the ZnO films made it possible to establish the contribution of their own defects and surface states to the conductivity.
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    Gas sensitivity of some nanoparticles ensembles in porous glass
    (Одеський національний університет імені І. І. Мечникова, 2022) Doicho, Ihor K.; Filevska, Liudmila M.; Hrinevych, Viktor S.; Дойчо, Ігор Костянтинович; Філевська, Людмила Миколаївна; Гріневич, Віктор Сергійович; Дойчо, Игорь Константинович; Филевская, Людмила Николаевна; Гриневич, Виктор Сергеевич
    The importance of substances’ surface development suitable for sensor technology by dispersing them to the level of nanoparticles’ ensemble within a certain matrix has been demonstrated. It has been proven that the best matrix for the formation of the specified ensemble of nanoparticles is porous silicate glass. Methods of formation of ensembles of nanoparticles of some compounds in porous glass are briefly considered. The applicability of the mentioned systems for sensors is demonstrated by the example of their luminescent response sensitivity to the presence of ammonia or HCl vapours in the environment.
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    INFLUENCE OF A PRECURSOR PROPERTIES ON THE SURFACE MORPHOLOGY OF NANOSCALE TIN DIOXIDE FILMS
    (Одесский национальный университете имени И. И. Мечникова, 2012) Hrinevych, Viktor S.; Smyntyna, Valentyn A.; Filevska, Liudmila M.; Гриневич, Виктор Сергеевич; Смынтына, Валентин Андреевич; Филевская, Людмила Николаевна; Гріневич, Віктор Сергійович; Сминтина, Валентин Андрійович; Філевська, Людмила Миколаївна
    The work presents the results of the nanosize tindioxide films' surface morphology investigation which is dependent on the precursor complex's technological properties used for their production. The used precursors differ only due to the technology of their preparation at the final stage. This defines the presence of the bound water in their composition. The water acts as a looser at the thermal decom-position which gives the possibility to obtain the nanosized films with nano grains of different sizes dependently on the precursor's type
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    INVESTIGATION OF TIN CONTAINING ORGANIC COMPLEXES FOR THE PRODUCTION OF NANOSIZED TIN DIOXIDE FILMS
    (Астропринт, 2010) Hrinevych, Viktor S.; Savin, Serhii M.; Smyntyna, Valentyn A.; Filevska, Liudmila M.
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    Investigation of tin containing organic complexes for the production of nanosized tin dioxide films
    (2010) Hrinevych, Viktor S.; Savin, Serhii M.; Smyntyna, Valentyn A.; Filevska, Liudmila M.; Ulug, B.; Turkdemir, M. Haluk; Ulug, A.; Yaltkaya, S.
    Thin films adsorptive sensitive elements based on oxide materials with nananosised grains found wide spread application in modern gas analyzers. Tin dioxide is one of such materials which have good sensitivity to some gases and chemically resistivity to some harmful and poisoning gases. Thus, investigation of the production processes of nanosized oxide materials layers, i.e. tin dioxide, is appeared to be important.
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    Morphology and optical properties of SnO2 nanofilms
    (2008) Smyntyna, Valentyn A.; Filevska, Liudmila M.; Hrinevych, Viktor S.
    Results of surface morphology and optical density investigations and the photoluminescence phenomenon were obtained for SnO2 thin films. Films having nanosize of their grains ~ 10-15 nm were obtained using polymeric materials. Evaluation of a dimensional quantization is fulfilled by two methods: analytically using AFM data, and by means of optical density spectra; results obtained by these two methods are in a good agreement.
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    MORPHOLOGY OF NANOSTRUCTURED SnO2 FILMS PREPARED WITH POLYMERS EMPLOYMENT
    (Астропринт, 2006) Filevska, Liudmila M.; Smyntyna, Valentyn A.; Hrinevych, Viktor S.; Филевская, Людмила Николаевна; Смынтына, Валентин Андреевич; Гриневич, Виктор Сергеевич; Філевська, Людмила Миколаївна; Сминтина, Валентин Андрійович; Гріневич, Віктор Сергійович
    The gas sensitivity applied problems solutions needs a consideration and detailed investigation of the material s electronic and ionic subsystems behavior. These systems behavior at their own turn are tightly connected with the structure and morphology of surfaces. The morphology investigations results are given for the SnO2 layers obtained with the polymers usage. При решении задач улучшения газовой чувствительности адсорбционных элементов возникает необходимость детального исследования поведения электронной и ионной подсистем материала, которые в свою очередь тесно связаны с его структурой и морфологией поверхности. В работе приведены результаты исследования поверхностной морфологии применяемых в газовом анализе пленок SnO2, полученных с использованием полимеров. При вирішенні задач підвищення газової чутливості адсорбційних елементів виникає необхідність детального дослідження поведінки електронної та іонної підсистем матеріалу, що в свою чергу тісно пов'язані з його структурою та морфологією поверхні. В роботі наведені результати дослідження поверхневої морфології плівок SnO2, отриманих з використанням полімерів.
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    Nano SnO2 layers surface morphology investigations
    (2006) Filevska, Liudmila M.; Smyntyna, Valentyn A.; Hrinevych, Viktor S.
    The nanocrystallized tin dioxide having the electroconductivity highly sensible to the state of the surface in the (300-800) K temperature region specific for the oxidizing-recollecting reactions has the most practical use in the gas analysis. It is one of not many materials, which may be obtained in highly dispersed state (crystallite sizes 5-20 nm).
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    Optical absorption and electronc sistem parameters of nano snO2 films
    (Одеський національний університет імені І. І. Мечникова, 2007) Filevska, Liudmila M.; Smyntyna, Valentyn A.; Hrinevych, Viktor S.; Филевская, Людмила Николаевна; Смынтына, Валентин Андреевич; Гриневич, Виктор Сергеевич; Філевська, Людмила Миколаївна; Сминтина, Валентин Андрійович; Гріневич, Віктор Сергійович
    Optical density investigation results were registered by authors for nano SnO2 thin films.Films having nano size of their grains ~10-15 nm were obtained using polymeric materials by sol-gel method. Evaluation of a dimensional quantization is fulfilled by two methods: analytically using AFM data, and by means of optical density spectra; results obtained by these two methods are in a good agreement.
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    OPTICAL ABSORPTION AND ELECTRONC SISTEM PARAMETERS OF NANO SnO2 FILMS
    (Астропринт, 2007) Filevska, Liudmila M.; Smyntyna, Valentyn A.; Hrinevych, Viktor S.; Филевская, Людмила Николаевна; Смынтына, Валентин Андреевич; Гриневич, Виктор Сергеевич; Філевська, Людмила Миколаївна; Сминтина, Валентин Андрійович; Гріневич, Віктор Сергійович
    Optical density investigation results were registered by authors for nano SnO2 thin films. Films having nano size of their grains ~10 15 nm were obtained using polymeric materials by sol-gel method. Evaluation of a dimensional quantization is fulfilled by two methods: analytically using AFM data, and by means of optical density spectra; results obtained by these two methods are in a good agreement. В работе представлены результаты исследованного авторами оптического поглощения тонких нанопленок SnO2. Пленки, имеющие нано размер зерен ~10-15 нм, были получены с использованием полимерных материалов в золь- гель методе. Двумя независимыми методами рассчитана энергия размерного квантования: с использованием данных атомно-силовой микроскопии и из спектров оптической плотности. Результаты этих двух расчетов хорошо согласуются между собой. В роботі представлені результати дослідженого авторами оптичного поглинання тонких нано плівок SnO2. Плівки, що мають нанорозмір зерен ~10-15 нм, були отримані з використанням полімерних матеріалів у золь-гель методі. Двома незалежними методами розраховано енергію розмірного квантування: з використанням даних атомно-силової мікроскопії та зі спектрів оптичної густини. Результати цих двох розрахунків добре узгоджуються між собою.
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    Optical constants detection in tin dioxide nano-size layers by surface plasmon resonance investigation
    (2011) Serdeha, B. K.; Matiash, I. E.; Maksymenko, L. S.; Rudenko, S. P.; Smyntyna, Valentyn A.; Hrinevych, Viktor S.; Filevska, Liudmila M.; Ulug, B.; Ulug, A.; Yucel, B. M.
    Optical constants of tin dioxide nano-size layers were detected using surface plasmons resonance research technique. Squared reflectance indexes difference as well as the ones with s- and p-polarized light are measured simultaneously. Obtained in the work the refraction coefficient of the tin dioxide film gives the possibility to judge about the structural perfection of the layer and confirms that the film has significant porosity, which is created during the decomposition of the polymer materials used as structuring additives. It is shown that the resonance condition for surface plasmons may be destroyed through the interaction of surface plasmons with surface roughness potential of the film (medium dielectric properties variation).
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    Photoluminescence of tin dioxide thin films, obtained with the use of polymers
    (2005) Filevska, Liudmila M.; Smyntyna, Valentyn A.; Hrinevych, Viktor S.
    Tin dioxide nanostructured thin films properties obtained by the photoluminescent methods are reported. As a result of the researches fulfilled the luminescence in the visible region of 577 nm and 642 nm was established which is not yet reported in the literature. The luminescent mechanism connected with the system of centers typical for nanostructured objects are analyzed. The radiation spectra types changes, caused by the thermal treatment of a nanoscale tin dioxide films were noticed, which may be connected with structural transformations. These transformations seems caused the luminescent mechanism change from the intercenters’ type to the recombinational one
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    PHOTOLUMINESCENCE OF TIN DIOXIDE THIN FILMS, OBTAINED WITH THE USE OF POLYMERS
    (Astroprint, 2005) Filevska, Liudmila M.; Smyntyna, Valentyn A.; Hrinevych, Viktor S.
    Tin dioxide nanostructured thin films properties obtained by the photoluminescent methods are reported.As a result of the researches fulfilled the luminescence in the visible region of 577 nm and 642 nm was established which is not yet reported in the literature. The luminescent mechanism connected with the system of centers typical for nanostructured objects are analyzed. The radiation spectra types changes, caused by the thermal treatment of a nanoscale tin dioxide films were noticed, which may be connected with structural transformations. These transformations seems caused the luminescent mechanism change from the intercenters' type to the recombinational one.
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    Physical problems of Gas Sensors' reliability
    (2001) Smyntyna, Valentyn A.; Hrinevych, Viktor S.
    The main physico-chemical processes which influenced the declination of gas sensors' parameters under exploitation from their operating values were investigated. These parameters are strongly connected with the structural transformations and the changes of band gap states'concentration.
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    Physical problems of the reliability of sensors based on A2B6 semiconductor compounds
    (1989) Hrinevych, Viktor S.; Smyntyna, Valentyn A.
    The sensors were made using the technology for vacuum deposition of the original material on an insulating substrate. In this case, a film of thickness 1 pin was formed which was equipped with planar indium ohmic contacts. The electrode gap was 2 mm. At the operating temperature, such sensors function mainly under conditions of changing current and resistance when exposed to a variation in gas concentration.