Факультет електроніки та інформаційних технологій (ЕлІТ)
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Item Отримання та фізичні властивості високоентропійних сплавів та покриттів(Сумський державний університет, 2023) Кучма, В.А.В бакалаврській роботі було розглянуто принципи дослідження вискоентропійних сплавів (багатокомпонентних покриттів), структура та фазовий склад, хімічні та термодинамічні властивості. Їх обробка та застосування, при роботі растрового мікроскопа та магнетронного розпилювача для подальшого застосування.Item Рентгенівський аналіз зразків, які містять наночастинки сполук кадмію(Сумський державний університет, 2015) Капітула, С.Ю.; Нечипорук, Б.Д.; Данілевська, Б.Д.; Татарин, Б.А.Показана можливість отримання наночастинок сполук кадмію електролітичним методом з використанням кадмієвих електродів і кухонної солі в якості електроліту. При температурі електроліту 98 ºС отримані наночастинки CdCO3, β-Cd(OH)2 і γ-Cd(OH)2 розміри яких оцінені за формулою Дебая-Шеррера в 22 нм, 21 нм і 19 нм відповідно. Вміст даних сполук визначався рентгенофазовим методом. Проведено аналіз впливу умов синтезу на вміст карбонату кадмію.Item Improvement of Mechanical, Thermal and Optical Properties of Barium Mixed Cobalt Tartrate Hydrate Crystals Grown by Gel Method(Sumy State University, 2015) Vanaja, S.; Selvamurugan, V.; Chandrasekar, P.V.; Krishna Sharma, R.; Alagar, M.In this present work, CTH and BCTH crystals have been prepared by gel technique by using single diffusion method at room temperature. The as grown crystals were characterized by using XRD, FT-IR, UV, TG / DTA and Micro hardness studies. X-ray powder diffraction results analyzed by using suitable software suggest that a CTH and BCTH crystals belong to cubic crystal system. The unit cell volume is observed to increase with increase in the concentration of barium in cobalt tartrate due to the lattice distortion. The band gap and optical properties have analyzed by UV-Visible spectrum. The functional groups and compound formation of the crystals have been studied by FT-IR spectrum. The mechanical properties of the grown crystals were tested by using Vicker’s microhardness studies. The work hardening coefficient (n) was determined to be 3.7 for CTH, 5.3 for BCTH (1 : 1) and 6.4 for BCTH (2 : 1) and the stiffness constants for different loads were calculated and reported. Thermal analysis suggests that pure cobalt tartrate starts decomposing at 73.2 C whereas the barium mixed cobalt tartrate brings about better thermal stability which increases with an increase in barium concentration.Item Structural and Optical Studies of 100 MeV Ni+7 Irradiated Cadmium Selenide Thin Films(Sumy State University, 2015) Singh, Rajesh; Yadav, A.D.; Jadhav, V.; Dubey, S.K.The effect of irradiation with Swift (100 MeV) Ni+ 7 ions on the structural and optical properties of Cadmium Selenide (CdSe) thin films have been investigated at different fluencies in the range of 1 1011- 1 1013 ions/cm – 2. The CdSe films on glass substrates were prepared by thermal evaporation. The structural and optical changes with respect to increasing fluence were observed by the means of X-ray diffraction (XRD), UV-VIS and Raman spectroscopy. After irradiating the films with Ni+ 7 ions XRD show the increased in peak intensity and crystallite size with increasing fluence. The UV-VIS-IR spectroscopy revealed that there is decrease in band gap energy of the films after irradiation with increasing fluencies. Raman spectrum for as deposited and irradiated films show two peak, one at 209 cm – 1 and at 410 cm – 1 which is assigned to the longitudinal optical (LO) phonon mode.Item Analysis of the Influence of Deposition Conditions on the Structure of the Coating Nb-Al-N(Sumy State University, 2015) Ivashchenko, V.I.; Skrynskiy, P.L.; Rogoz, V.N.; Kupchishin, A.I.; Węgierek, P.Nanocomposite Nb-Al-N films prepared by magnetron sputtering have been studied. It has been found that, in the films, there are two stable crystalline structural states, namely, NbNz and B1-Nb1 – xAlxNyO1 – y, and an amorphous like component related to aluminum oxynitride upon reactive magnetron sputtering. The substructure characteristics are sensitive to the current supplied to an Al target and related to the Knoop nanohardness and hardness, which change within in the ranges of 29-33.5 and 46-48 GPa, respectively. Ab initio calculations for the NbNz and Nb2AlN phases and NbN / AlN heterostructures have been performed to interpret the obtained results for the first time.Item Structural and Morphological Study of Nickel Doped Tin Oxide Nanoparticles Synthesized Via Sol-Gel Technique(Sumy State University, 2015) Singh, V.; Singh, D.; Kumar, S.; Maan, A.S.In the present paper nickel doped tin oxide nanoparticles were synthesized by using simple sol–gel technique. The as-synthesized sample was characterized by means of X-ray powder diffraction (XRD) spectroscopy and Energy-dispersive X-ray spectroscopy (EDX) techniques for its structural analysis. XRD spectrum reveals that all the nanoparticles are highly polycrystalline in nature and five major peaks were clearly observed. Ni-doped SnO2 crystals existed mainly as tetragonal rutile structure. The average particle size of the nanoparticles was calculated by using the Scherrer formula and it was obtained 20 nm. EDX analysis confirms the presence of Nickel. No other impurities were found. The morphology of the nanoparticles was analyzed by using scanning electron microscope (SEM). The SEM image of the studied nanoparticles confirms the existence of very small, homogeneously distributed, spherical and crystalline nanoparticles.Item Synthesis, Characterization, and Size Control of Zinc Sulfide Nanoparticles Capped by Polyethylene Glycol(Sumy State University, 2015) Allehyani, S.H.A.; Seoudi, R.; Said, D.A.; Lashin, A.R.; Abouelsayed, A.Zinc sulfide nanoparticles were synthesized with controllable size via chemical precipitation. highresolution transmission electron microscopy (HRTEM) and X-ray powder diffraction (XRD) showed that the samples were grown with the cubic phase; the particle size was varied by varying the molar ratios of zinc chloride and sodium sulfide in the presence of poly(ethylene glycol). The optical band gap was calculated on the basis of ultraviolet-visible spectroscopy (UV-VIS) and ranged from 4.13 eV to 4.31 eV depending on the particle size. Surface passivation and adsorption of poly(ethylene glycol) on the nanoparticles was explained on the basis of Fourier transform infrared measurements (FTIR).Item Дослідження плівок Pb1-xSnxTe методами XRD та µ-PIXI(Видавництво Львівського національного університуту імені Івана Франка, 2014) Коваль, Павло Вікторович; Коваль, Павел Викторович; Koval, Pavlo Viktorovych; Ташликов, І.; Опанасюк, Анатолій Сергійович; Опанасюк, Анатолий Сергеевич; Opanasiuk, Anatolii Serhiiovych; Пономарьов, Олександр Георгійович; Пономарев, Александр Георгиевич; Ponomarov, Oleksandr HeorhiiovychВ останній час плівки трьохкомпонентного розчину Pb1-xSnxTe привертають до себе підвищену увагу як поглинаючі шари дешевих тонкоплівкових сонячних елементів альтернативні таким матеріалам як CuInSe2, CuIn1–xGaxSe2, Cu2ZnSnS4 та CdTe. Також ці напівпровідники використовуються для створення приймачів інфрачервоного випромінювання, твердотільних лазерів, а також є перспективними для побудови фотоприймачів терагерцового діапазону.Item The Study of the Alginate / Hydroxyapatite Composites Structural Properties(Sumy State University, 2014) Суходуб, Леонід Федорович; Суходуб, Леонид Федорович; Sukhodub, Leonid Fedorovych; Kuznetsov, V.N.; Sukhodub, L.B.This paper describes the synthesis of sodium alginate (Alg) / hydroxyapatite (HA) composites and the influence of the presence of Alg on HA crystallization. Such composites become rather widespread in recent years, and are used in medicine generally for the controlled drug delivery [1‑3]. In one’s case, Alg is used as the functional and cost-effective replacement of the collagen for the creation of implants similar to the natural bone [4]. It was shown that the presence of Alg and the increase of its concentration leads to the decrease of the HA crystallinity thus providing an ability to control its levels in the resulting product. The FTIR studies confirm the incorporation of Alg in the Alg / HA composite structure.Item Effect of Substrate Temperature on the Structural Properties of CdxZn1-xTe Films Grown by Close-Spaced Sublimation Method(Sumy State University, 2014) Znamenshchykov, Y.V.; Kosyak, V.V.; Опанасюк, Анатолій Сергійович; Опанасюк, Анатолий Сергеевич; Opanasiuk, Anatolii Serhiiovych; Stanislavov, A.; Kuznetsov, V.; Gnatenko, Yu.P.In this work by energy dispersive analysis of X-rays, scanning electron microscopy and X-ray diffraction methods films of CdxZn1-xTe solid solution, obtained by a close-spaced vacuum sublimation technique under different temperatures of glass substrate, has been studied. Films were deposited by the co sublimation of Cadmium Telluride (CdTe) and Zinc Telluride (ZnTe) chunks, mixed in the ratio of 2:1. The effect of substrate temperature on the surface morphology, elemental and phase composition, lattice parameter, scattering domain sizes has been studied. The results of these studies can be used for obtaining absorber layers of tandem solar cells, basic layers of X-ray and gamma detectors.
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