Перегляд за Автор "Ulug, A."

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  • Ескіз
    Документ
    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.
  • Ескіз недоступний
    Документ
    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).
  • Ескіз
    Документ
    Structure, spectroscopic and thermal characterization of bis(acetylacetonato)dichlorotin(IV) synthesized in aqueous solution
    (2010) Ulug, B.; Turkdemir, M. Haluk; Ulug, A.; Buyukgungor, O.; Yucel, M. B.; Smyntyna, Valentyn A.; Hrinevych, Viktor S.; Filevska, Liudmila M.
    Bis(acetylacetonato)dichlorotin(IV) is synthesized from the aqueous solutions of tin(IV) chloride and acetylacetone followed by vacuum drying at room temperature. DTA/TGA, FTIR, UV-VIS, X-ray powder and single crystal, mass spectra and elemental analysis are performed to characterize the product. X-ray powder diffraction suggests that the sample may contain some impurities such as SnO, SnO2 and Sn2O3 while the mass spectra indicates the existence of Sn(acac)4, which is arguable due to the steric effect. Single crystal investigation reveals that the product synthesized in aqueous solution is Sn(acac)2Cl2, crystallized in monoclinic system in space group C2/c with unit cell constants a=13.983(2), b=7.8928(8), c=13.7889(19) Ao and b=107.601(11)o, whose volume is 1.43 % smaller than the one synthesized in dry toluene.
  • Ескіз
    Документ
    Термогравиметрические исследования комплексов прекурсора для получения наноразмерных пленок двуокиси олова
    (Астропринт, 2011) Гриневич, В. С.; Смынтына, Валентин Андреевич; Савин, С. Н.; Филевская, Л. Н.; Улуг, Б.; Халук Туркдемир, М.; Улуг, А.; Ялткая, С.; Гріневич, В. С.; Сминтина, Валентин Андрійович; Савін, С. М.; Філевська, Л. М.; Улуг, Б.; Халук Туркдемір, М.; Улуг, А.; Ялткая, С.; Grinevich, V. S.; Savin, S. N.; Smyntyna, Valentyn A.; Filevska, Liudmyla M.; Ulug, B.; Haluk, Turkdemir, M.; Ulug, A.; Yaltkaya, S.
    В работе представлены результаты термогравиметрических исследований двух комплексов прекурсора двуокиси олова для чувствительных элементов сенсоров,позволившие установить и сопоставить основные этапы их термического разложения. Различия в процессах разложения комплексов обусловлены различиями в их составе, а именно, в наличии (в комплексе № 1) или отсутствии (в комплексе № 2) молекул координированной воды. При термическом разложении комплекса вода в его составе выполняет функцию его разрыхления, что позволяет получать пленки двуокиси олова с наноразмерными зернами.