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Articles de revues sur le sujet « Zinc oxide films »

Auteur : Grafiati
Publié le 4 juin 2021
Mis à jour le 9 février 2022

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1

Huang, Jin Hua, Rui Qin Tan, Jia Li, Yu Long Zhang, Ye Yang et Wei Jie Song. « Thermal Stability of Aluminum Doped Zinc Oxide Thin Films ». Materials Science Forum 685 (juin 2011) : 147–51. http://dx.doi.org/10.4028/www.scientific.net/msf.685.147.

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Transparent conductive oxides are key electrode materials for thin film solar cells. Aluminum doped zinc oxide has become one of the most promising transparent conductive oxide (TCO) materials because of its excellent optical and electrical properties. In this work, aluminum doped zinc oxide thin films were prepared using RF magnetron sputtering of a 4 at% ceramic target. The thermal stability of aluminum doped zinc oxide thin films was studied using various physical and structural characterization methods. It was observed that the electrical conductivity of aluminum doped zinc oxide thin films deteriorated rapidly and unevenly when it was heated up to 350 °C. When the aluminum doped zinc oxide thin films were exposed to UV ozone for a short time before heating up, its thermal stability and large area homogeneity were significantly improved. The present work provided a novel method for improving the durability of aluminum doped zinc oxides as transparent conductive electrodes in thin film solar cells.
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2

Li, Z. W., W. Gao et Roger J. Reeves. « Zinc oxide films by thermal oxidation of zinc thin films ». Surface and Coatings Technology 198, no 1-3 (août 2005) : 319–23. http://dx.doi.org/10.1016/j.surfcoat.2004.10.111.

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Verghese, P. M., et D. R. Clarke. « Surface textured zinc oxide films ». Journal of Materials Research 14, no 3 (mars 1999) : 1039–45. http://dx.doi.org/10.1557/jmr.1999.0138.

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Both epitaxial and crystallographically fiber-textured ZnO films can exhibit a surface texturing (“cratered”) morphology when grown by pulsed laser deposition at temperatures in the range of 350–750 °C in a background pressure of oxygen. The surface texturing is a consequence of the nucleation of oriented c axis grains that grow geometrically and impinge laterally. It is concluded that the surface texturing is due to nonequilibrium growth, being the result of a competition between the arriving flux, diffusive flux along the surface, and, possibly, concurrent ion etching from the laser-ablated plasma plume. At higher temperatures, no surface texturing occurs, presumably because of concurrent grain growth and more rapid surface smoothing by diffusion.
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Choi, Hak-Soon, Il-Kyo Jeong, Mun-Soo Shin, Heon-Oh Kim et Yong-Soo Kim. « Properties of Indium Zinc Oxide Thin Films Prepared by Pulsed Laser Deposition ». Journal of the Korean Institute of Electrical and Electronic Material Engineers 24, no 7 (1 juillet 2011) : 537–42. http://dx.doi.org/10.4313/jkem.2011.24.7.537.

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Beedri, Niyamat, Yusuf Inamdar, Suhail Anjum Sayyed, Arif Shaikh, Sandesh Jadkar et Habib Pathan. « Growth of Zinc Oxide Porous Films via Electrochemical Anodization Using Glycerol Based Electrolyte ». Chemistry & ; Chemical Technology 8, no 3 (1 septembre 2014) : 283–86. http://dx.doi.org/10.23939/chcht08.03.283.

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Klochko, N. P. « Nanoscale tin dioxide films and zinc oxide hierarchical nanostructures for gas sensing applications ». Semiconductor Physics Quantum Electronics and Optoelectronics 17, no 4 (10 novembre 2014) : 358–67. http://dx.doi.org/10.15407/spqeo17.04.358.

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WANG, YANG, CHENGBIAO WANG, ZHIJIAN PENG, QI WANG et XIULI FU. « MANIPULATING THE STRUCTURAL AND ELECTRICAL PROPERTIES OF ZINC OXIDE THIN FILMS BY CHANGING THE SPUTTERING POWER OF RADIO FREQUENCY MAGNETRON SPUTTERING ». Surface Review and Letters 24, Supp01 (31 octobre 2017) : 1850006. http://dx.doi.org/10.1142/s0218625x18500063.

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Oxygen-deficient zinc oxides thin films with different levels of defects were prepared by using radio frequency magnetron sputtering method with sintered zinc oxide disk as target at different sputtering powers. The composition, structure and electrical properties of the prepared films were investigated. Under the present conditions, all the obtained films possessed würtzite structure, which were growing preferentially along the [Formula: see text]-axis. The thickness of the films, the size of the zinc oxide grains and the content of Zn atoms increased with increasing sputtering power. In the films deposited at a sputtering power from 52[Formula: see text]W to 212[Formula: see text]W, the main defect was interstitial zinc. With increasing sputtering power, due to the enhanced number of interstitial zinc in the films, their room-temperature electrical resistivity would decrease, which was controlled by electron conduction. At increasing measurement temperature, their electrical resistivity would increase, owing to the decrease of defect concentration caused by oxidization.
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Michaelis, Esther, Kazuteru Nonomura, Derck Schlettwein, Tsukasa Yoshida, Hideki Minoura et Dieter Wöhrle. « Hybrid thin films of ZnO with porphyrins and phthalocyanines prepared by one-step electrodeposition ». Journal of Porphyrins and Phthalocyanines 08, no 12 (décembre 2004) : 1366–75. http://dx.doi.org/10.1142/s1088424604000726.

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Hybrid thin films of crystalline zinc oxide and the zinc complex of 5,10,15,20-tetrakis-(4-sulfonatophenyl)porphyrin (ZnTPPS) have been prepared by cathodic electrodeposition from different aqueous zinc salt solutions. Films from a solution containing zinc nitrate and the porphyrin derivate show a rough surface and porosity, whereas films prepared from an oxygen-saturated zinc chloride solution were very smooth. The presence of the porphyrin derivative in the deposition solution has a clear influence on the morphology of the hybrid films compared with pure zinc oxide films. In aqueous zinc nitrate solution the addition of the porphyrin derivative hinders the growth of zinc oxide. In contrast, the addition of the dye to the oxygen-saturated zinc chloride solution leads to an increase of the growth rate of ZnO /porphyrin hybrid films. An increased spectral absorbance was reached when two dyes (zinc complex of tetrasulfonated phthalocyanine and porphyrin) were added to the zinc nitrate solution since the electrodeposited hybrid thin films contained both dyes. UV-vis spectra revealed the presence of both macrocyclic metal complexes in the ZnO films.
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Xia, Zhi Lin, Qi Xu et Li Xin Zhao. « The Microstructure of Zinc Oxide Films Prepared by Hydrothermal Method ». Advanced Materials Research 306-307 (août 2011) : 1238–41. http://dx.doi.org/10.4028/www.scientific.net/amr.306-307.1238.

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In the solutions which are prepared by mixing zinc nitrate hexahydrate, strong ammonia and methenamine in water bath at 90 Centigrade, lamellate and granular zinc oxide films have grown on different substrates such as B270 glass, glass based PAA films, pure aluminum foil and aluminum based PAA films. Films microstructures were characterized by scanning electron microscope (SEM). The influences of substrate and pH on the films microstructure were analyzed. Results reflect that: Ammonia plays an important role in the growing competition of grainy crystal; the more concentration of ammonia, the more zinc oxide crystals grow into granular. Because of the high specific area and adsorption capacity, lacunaris zinc oxide films have great application perspective in gas sensor, catalyzed sorption and biochemistry.
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10

Sohn, Hong Yong, et Arun Murali. « Plasma Synthesis of Advanced Metal Oxide Nanoparticles and Their Applications as Transparent Conducting Oxide Thin Films ». Molecules 26, no 5 (7 mars 2021) : 1456. http://dx.doi.org/10.3390/molecules26051456.

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This article reviews and summarizes work recently performed in this laboratory on the synthesis of advanced transparent conducting oxide nanopowders by the use of plasma. The nanopowders thus synthesized include indium tin oxide (ITO), zinc oxide (ZnO) and tin-doped zinc oxide (TZO), aluminum-doped zinc oxide (AZO), and indium-doped zinc oxide (IZO). These oxides have excellent transparent conducting properties, among other useful characteristics. ZnO and TZO also has photocatalytic properties. The synthesis of these materials started with the selection of the suitable precursors, which were injected into a non-transferred thermal plasma and vaporized followed by vapor-phase reactions to form nanosized oxide particles. The products were analyzed by the use of various advanced instrumental analysis techniques, and their useful properties were tested by different appropriate methods. The thermal plasma process showed a considerable potential as an efficient technique for synthesizing oxide nanopowders. This process is also suitable for large scale production of nano-sized powders owing to the availability of high temperatures for volatilizing reactants rapidly, followed by vapor phase reactions and rapid quenching to yield nano-sized powder.
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Takahashi, Yasutaka, Masaaki Kanamori, Akiko Kondoh, Hideki Minoura et Yutaka Ohya. « Photoconductivity of Ultrathin Zinc Oxide Films ». Japanese Journal of Applied Physics 33, Part 1, No. 12A (15 décembre 1994) : 6611–15. http://dx.doi.org/10.1143/jjap.33.6611.

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12

Straumal, B. B., S. G. Protasova, A. A. Mazilkin, G. Schütz, E. Goering, B. Baretzky et P. B. Straumal. « Ferromagnetism of zinc oxide nanograined films ». JETP Letters 97, no 6 (mai 2013) : 367–77. http://dx.doi.org/10.1134/s0021364013060143.

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Straumal, B. B., A. A. Mazilkin, S. G. Protasova, P. B. Straumal, A. A. Myatiev, G. Schütz, E. Goering et B. Baretzky. « Ferromagnetism of nanostructured zinc oxide films ». Physics of Metals and Metallography 113, no 13 (décembre 2012) : 1244–56. http://dx.doi.org/10.1134/s0031918x12130030.

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Ataev, B. M., A. M. Bagamadova, V. V. Mamedov, A. K. Omaev et M. R. Rabadanov. « Conductive and transparent zinc oxide films ». Inorganic Materials 36, no 3 (mars 2000) : 219–22. http://dx.doi.org/10.1007/bf02757924.

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Wu, Guang Ming, Yao Ding, De Wen Gao, Guang Jian Xing, Yang Zhou et Tian Lan Yin. « Electrochemical Deposition and Properties Research of ZnO Thin Films ». Advanced Materials Research 669 (mars 2013) : 72–78. http://dx.doi.org/10.4028/www.scientific.net/amr.669.72.

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The transparent ZnO films were deposited on the indium tin oxide (ITO) coated glass substrates by using the square wave potential deposition method. The conductive graphite plate is used for counter electrode, electrolyte consist of zinc nitrate and additive of electrochemistry, which is made up CTAB and potassium nitrate. Crystallinities of the films were examined by X-ray diffractometer. The morphologies of zinc oxide films were observed with atomic force microscope. Optical characteristics of zinc oxide layers were measured with UV–vis spectrophotometer. The optimal conditions for preparation of zinc oxide thin films with the square wave potential method were as follows: the deposition time was 6 min, concentration of zinc nitrate was 0.05mol/L, deposition temperature was 80 °C, and the annealing temperature was 500 º C. The average optical transmittance of the ZnO films is higher than 85% in the visible range. Moreover, the films have flat surface and small grain size.
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16

Liu, Bin, Zu Hua Yang et Jian Song Zhou. « Tribological Behavior of Polyimide/Zinc Oxide Hybrid Films ». Advanced Materials Research 105-106 (avril 2010) : 438–40. http://dx.doi.org/10.4028/www.scientific.net/amr.105-106.438.

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A series of polyimide/ZnO films were successfully prepared via a solution process. The friction and wear behavior of the hybrid polyimide films in dry sliding against Si3N4 ball was examined on a DF-PM ball-on-block unidirectional friction and wear test rig. The worn surface morphologies of the films were observed with a scanning electron microscope. It was found that the introduction of zinc oxide led to improving the tribological characteristics and thermal stability of the polyimide films. The polyimide/zinc oxide hybrid films had much better friction-reducing ability and wear-resistance than the neat PI film.
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17

Alivov, Ya I., A. V. Chernykh, M. V. Chukichev et R. Y. Korotkov. « Thin polycrystalline zinc oxide films obtained by oxidation of metallic zinc films ». Thin Solid Films 473, no 2 (février 2005) : 241–46. http://dx.doi.org/10.1016/j.tsf.2004.07.068.

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18

Matsumoto, Kenji, Yutaka Adachi, Takeshi Ohgaki, Isao Sakaguchi, Tsubasa Nakagawa, Naoki Ohashi et Hajime Haneda. « Zinc Self-Diffusion in Isotopic Heterostructured Zinc Oxide Thin Films ». Key Engineering Materials 421-422 (décembre 2009) : 193–96. http://dx.doi.org/10.4028/www.scientific.net/kem.421-422.193.

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Zinc isotopic heterostructured zinc oxide thin films of 64ZnO/68ZnO/64ZnO were synthesized using pulsed laser deposition. The pulsed laser was first irradiated onto a polycrystalline target of 64ZnO to deposit the 64ZnO layer, then onto the 68ZnO target to prepare the 68ZnO layer and finally, the 64ZnO target was used again. The 64ZnO/68ZnO/64ZnO layered thin film was thus obtained. The thin films were annealed at various diffusion annealing temperatures. Diffusion profiles of the zinc isotopes due to the annealing were evaluated using secondary ion mass spectrometry (SIMS). The diffusion coefficients were slightly higher near the interface between the thin film and the substrate (the inner region) compared to the near surface (the outer region).
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Lenz, Thomas, Moses Richter, Gebhard J. Matt, Norman A. Luechinger, Samuel C. Halim, Wolfgang Heiss et Christoph J. Brabec. « Charge transport in nanoparticular thin films of zinc oxide and aluminum-doped zinc oxide ». Journal of Materials Chemistry C 3, no 7 (2015) : 1468–72. http://dx.doi.org/10.1039/c4tc01969e.

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In this work, we report on the electrical characterization of nanoparticular thin films of zinc oxide and aluminum-doped ZnO. Temperature-dependent current–voltage measurements revealed that charge transport is well described by the Poole–Frenkel model.
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Somphotch, Chulaluk, Azusa Ooi, Eiji Tada et Atsushi Nishikata. « Corrosion Behavior of Zinc Covered with Native Oxides Under Thin Solution Films ». Corrosion 76, no 6 (11 mars 2020) : 562–69. http://dx.doi.org/10.5006/3523.

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This study clarified the influence of native oxides on the atmospheric corrosion of Zn. The electrochemical impedance spectroscopy (EIS) values of native-oxide-covered Zn were measured under thin solution films of 10 μm to 500 μm in thickness. The native oxides were formed by exposing pure Zn plates to humidified air at two different temperatures, 25°C and 60°C, for the duration of one week. EIS was applied to the native-oxide-covered Zn for measurement under thin solution films; the results were analyzed using a transmission line equivalent circuit to determine the charge-transfer resistance (Rct). The native oxide formed at 25°C strongly suppressed the corrosion rate (1/Rct) of Zn, which was independent of the solution film thickness (Xf). However, the 1/Rct was not reduced by the native oxides formed at 60°C, as it was dependent on Xf. This paper discusses the different behaviors of the native oxides in the context of corrosion protection.
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Matysiak, Wiktor, Tomasz Tański et Marta Zaborowska. « Manufacturing process and optical properties of zinc oxide thin films as photoanode in DSSC ». Journal of Achievements in Materials and Manufacturing Engineering 1, no 86 (1 janvier 2018) : 33–40. http://dx.doi.org/10.5604/01.3001.0011.6016.

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Purpose: It has been recently observed, that zinc oxide thin films are gaining much popularity, particularly in applications such as toxic gas sensors, photocatalytic materials and photovoltaic cells. Due to much better physical properties of ZnO compared to the ones of titanium dioxide (TiO2), which is currently the most used material in dye sensitized solar cells, efforts are being made to fabricate DSSCs with thin films and/or nanostructures, including nanowires, nanofibres and nanoparticles of zinc oxide. Design/methodology/approach: In this paper, zinc oxide thin films were prepared using sol-gel and spin coating methods from Zn(COO)2 x 2H2O dissolved in ethanol and acetic acid with ZnO monocrystalline nanoparticles of 0 and 10% (wt.) relative to the final concentration of produced solutions. The effect of calcination process on ZnO thin films at 600°C were examined using atomic force microscope to investigate the morphology of semiconductor coatings, infrared spectroscopy to prove the chemical structure of material. Besides, optical properties were analysed on the basis of absorbance in the function of wavelength spectra and the values of energy band gaps were studied. Findings: The topography analysis of ZnO thin films showed an increase in roughness with the increase of zinc oxide nanoparticles in the thin films material. In addition, the analysis of the optical properties of ZnO thin films showed a decrease in absorption level in the range of near-ultraviolet wavelength for the obtained layers after annealing. Research limitations/implications: It was found that ZnO thin films produced by spin coating and calcination method are a proper material for photoanode in dye-sensitized solar cells, as zinc oxide layers provide better conductivity across the photovoltaic cell. Practical implications: The results provide the possibility of production DSSCs with zinc oxide thin films as photoanode. Originality/value: The dye-sensitized solar cells based on zinc oxide photoanodes could be alternative semiconductor material to titanium dioxide, which is used in nowadays solar cells. It was estimated that ZnO, especially zinc oxide nanostructures have much better physical properties, than TiO2 structures. What is more, zinc oxide thin layers are characterized by the lower energy losses resulting from the physical properties of such nanostructures, which results in more efficient solar energy into electricity conversion.
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Raviendra D. et J. K. Sharma. « Electroless deposition of cadmium stannate, zinc oxide, and aluminum‐doped zinc oxide films ». Journal of Applied Physics 58, no 2 (15 juillet 1985) : 838–44. http://dx.doi.org/10.1063/1.336310.

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Abdessalem, M., N. Bellakhal et M. Dachraoui. « Preparation of Zinc Oxide Films by a Humid Air Plasma ». Journal of Chemical Research 2003, no 5 (mai 2003) : 281–83. http://dx.doi.org/10.3184/030823403103173804.

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The surface of zinc metal exposed to a humid air plasma gives rise to an oxide layer which was identified by the linear sweep voltammetry technique. The quantity of zinc oxide (ZnO) layer formed increases with exposure time and the humid air gas flow. The humid air plasma treatment of a zinc surface can be proposed as a new technique to prepare zinc oxide.
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Rajachidambaram, Meena S., Tamas Varga, Libor Kovarik, Rahul Sanghavi, Vaithiyalingam Shutthanandan, Suntharampillai Thevuthasan, Seung-Yeol Han, Chih-Hung Chang et Gregory S. Herman. « Formation of zinc oxide films using submicron zinc particle dispersions ». Journal of Vacuum Science & ; Technology B, Nanotechnology and Microelectronics : Materials, Processing, Measurement, and Phenomena 30, no 4 (juillet 2012) : 041805. http://dx.doi.org/10.1116/1.4731255.

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Voon, C. H., M. N. Derman, Uda Hashim, B. Y. Lim, S. T. Sam, K. L. Foo et Seng Teik Ten. « Synthesis of Nanoporous Zinc Oxide by Anodizing of Zinc in Distilled Water ». Applied Mechanics and Materials 754-755 (avril 2015) : 1126–30. http://dx.doi.org/10.4028/www.scientific.net/amm.754-755.1126.

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In this work, ZnO nanoporous thin films were formed by anodizing of Zn plates in 500 ml distilled water of 25°C at voltage ranged from 10 V to 30 V. As anodized zinc plates were characterized by using SEM and XRD. Characterization of as anodized Zn plates using SEM showed that the morphology of the as anodized Zn plates were significantly influenced by the anodizing voltages. Nanoporous ZnO thin films were formed when 25 V and 30 V were used while ZnO thin films without nanoporous structures were formed when 10 V, 15 V and 20 V were used. XRD analysis indicated the ZnO thin films formed at 10 V to 30 V were of hexagonal wurtzite structures.
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Sorna Gowri, V., Raj Kumar Sen, Sunil Kumar Sanghi et Avanish Kumar Srivastava. « New Epoxy Poly(dimethyl acrylamide) Polymer for the Dispersion of ZnO Nanoparticles ». Advanced Science, Engineering and Medicine 12, no 10 (1 octobre 2020) : 1231–35. http://dx.doi.org/10.1166/asem.2020.2683.

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A series of novel Zinc Oxide (ZnO) copolymer composites films with different Zinc Oxide concentration were prepared through incorporation of pre-made Zinc Oxide particle in to copolymer epoxy poly(dimethyl acrylamide). The copolymer epoxy poly(dimethyl acrylamide) was synthesized by free radical polymerization to disperse the Zinc Oxide nanoparticles. The Zinc Oxide nanoparticles with the diameter of 19 nm–35 nm were synthesized from zinc nitrate via a wet chemical method. The aim of the work is to develop a new method/process/material for the dispersion of Zinc Oxide nanoparticles and testing the performance of these composites films. Thermo gravimetric analysis show that Zinc Oxide nanoparticles were successfully incorporated into the polymer matrix and the Zinc Oxide copolymer composites have a good thermal stability. The micro structural analysis also show newly synthesized polymer disperse the nanoparticles well as evidenced by Scanning Electron Microscopy (SEM) analysis. The uniformly dispersed Zinc Oxide nanoparticle in the polymer matrix and the particles almost remained in their original shape and size even after incorporation in the polymer matrix. Fourier transform infrared spectroscopy (FT-IR) shift of the copolymer adsorbed Zinc Oxide nanoparticles confirmed that polymer molecules chain was anchored on the surface of the nanoparticles.
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Singh, Girjesh, S. B. Shrivastava, Deepti Jain, Swati Pandya et V. Ganesan. « Effect of Molarity of Precursor Solution on Nanocrystalline Zinc Oxide Thin Films ». Defect and Diffusion Forum 293 (août 2009) : 99–105. http://dx.doi.org/10.4028/www.scientific.net/ddf.293.99.

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During the last two decades, the use of transparent conducting films of non-stoichiometric and doped metallic oxides for the conversion of solar energy into electrical energy has assumed great significance. A variety of materials, using various deposition techniques, has been tried for this purpose [1-3]. Among these various materials, zinc oxide (ZnO) is one of the prominent oxide semiconductors suitable for photovoltaic applications because of its high electrical conductivity and optical transmittance in the visible region of the solar spectrum [4]. Furthermore, thin films of ZnO have shown good chemical stability against hydrogen plasma, which is of prime importance in a-Si:H-based solar-cell fabrication. Thus, zinc oxide can serve as a good candidate for replacing SnO2 and indium tin oxide (ITO) films in Si:H-based solar cells. One of the outstanding features of ZnO is its large excitonic binding energy, i.e. 60meV, leading to the existence of excitons at room temperature and even at higher temperatures [5-8]. These unique characteristics have generated a wide range of applications of ZnO. For example, gas sensors [9], surface acoustic devices [10], transparent electrodes and solar cells. Many techniques are used for preparing the transparent conducting ZnO films, such as RF sputtering [11], evaporation [12], chemical vapour deposition [13], ion beam sputtering [14] and spray pyrolysis [15–18]. Among these, the spray pyrolysis technique has attracted considerable attention due to its simplicity and large-scale production combined with low-cost fabrication. By using this technique, one can produce large-area coatings without any need for ultra-high vacuum. Thus, the capital cost and the production cost of high-quality zinc oxide semiconductor thin films are lowest among all other techniques. In the present work, we have synthesized ZnO films by using the spray pyrolysis technique. A number of films have been prepared by changing the molarity of the precursor solution. The prepared films have been characterized with regard to their structural, morphological and electrical properties.
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Chen, Yijia J., Shen-how Zhu et Tien-Chai Lin. « Precipitation of Molybdenum Oxides in Supersaturated Zinc Oxide Thin Films ». ECS Meeting Abstracts MA2020-01, no 23 (1 mai 2020) : 1347. http://dx.doi.org/10.1149/ma2020-01231347mtgabs.

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Chen, Yijia J., Shen-how Zhu et Tien-Chai Lin. « Precipitation of Molybdenum Oxides in Supersaturated Zinc Oxide Thin Films ». ECS Transactions 97, no 4 (1 mai 2020) : 37–43. http://dx.doi.org/10.1149/09704.0037ecst.

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Pino, Paolo, Silvia Ronchetti, Chiara Mollea, Marco Sangermano, Barbara Onida et Francesca Bosco. « Whey Proteins–Zinc Oxide Bionanocomposite as Antibacterial Films ». Pharmaceutics 13, no 9 (8 septembre 2021) : 1426. http://dx.doi.org/10.3390/pharmaceutics13091426.

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The use of toxic crosslinking agents and reagents in the fabrication of hydrogels is a frequent issue which is particularly concerning for biomedical or food packaging applications. In this study, novel antibacterial bionanocomposite films were obtained through a simple solvent casting technique without using any crosslinking substance. Films were made from a flexible and transparent whey protein matrix containing zinc oxide nanoparticles synthesised via a wet chemical precipitation route. The physicochemical and functional properties of the ZnO nanoparticles and of the composite films were characterised, and their antibacterial activity was tested against S. epidermidis and E. coli. The synthesised ZnO nanoparticles had an average size of about 30 nm and a specific surface area of 49.5 m2/g. The swelling ratio of the bionanocomposite films increased at basic pH, which is an appealing feature in relation to the absorption of chronic wound exudate. A n-ZnO concentration-dependent antibacterial effect was observed for composite films. In particular, marked antibacterial activity was observed against S. epidermidis. Overall, these findings suggest that this novel material can be a promising and sustainable alternative in the design of advanced solutions for wound dressing or food packaging.
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Farhad, SFU, NI Tanvir, MS Bashar, MS Hossain, M. Sultana et N. Khatun. « Facile synthesis of oriented zinc oxide seed layer for the hydrothermal growth of zinc oxide nanorods ». Bangladesh Journal of Scientific and Industrial Research 53, no 4 (9 décembre 2018) : 233–44. http://dx.doi.org/10.3329/bjsir.v53i4.39186.

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Oriented zine oxide (ZnO) seed layers were deposited by simple drop casting of zinc acetate dihydrate (ZAD) solution on glass substrates at room temperature followed by a post-heat treatment at 250 oC. X-ray diffraction (XRD) analyses revealed that ZAD solutions with concentration 0.0025 – 0.0100 M produced amorphous type thin films, whereas 0.0200 M ZAD solutions produced ZnO seed layers with a preferential c-axis texturing.The Scanning Electron Microscopy (SEM) analyses evident that the morphology of ZnO seed layer surface is compact and coherently carpets the underlying glass substrate. ZnO nanorods were then grown by hydrothermal method atop the ZnO seeded and non-seeded substrates. The presence of ZnO seeding layers was found to be beneficial for growing ZnO NRs films vertically. The optical bandgap of ZnO seed and ZnO NR were estimated to be in the range of 3.40 – 3.95 eV and 3.20 – 3.25 eV respectively by using UV-VIS-NIR diffuse reflection spectroscopy. The room temperature photoluminescence analyses revealed that nanostructured ZnO films exhibit a sharp near-band-edge luminescence peak at ~380 nm consistent with the estimated optical band gap and the ZnO nanorod arrays are notably free from defect-related green-yellow emission peaks.Bangladesh J. Sci. Ind. Res.53(4), 233-244, 2018
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32

Sanmyo, Masahiro, Yasumasa Tomita et Kenkichiro Kobayashi. « Doping of Nitrides into Zinc Oxide Films ». Key Engineering Materials 248 (août 2003) : 87–90. http://dx.doi.org/10.4028/www.scientific.net/kem.248.87.

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NISHINO, Junichi, Shouichi FURUSE, Akiko SATOH, Shigeo OHSHIO et Kiichiro KAMATA. « Etching of Zinc Oxide Films by Acetylacetone ». Journal of the Ceramic Society of Japan 103, no 1193 (1995) : 85–87. http://dx.doi.org/10.2109/jcersj.103.85.

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Gaspar, D., L. Pereira, K. Gehrke, B. Galler, E. Fortunato et R. Martins. « High mobility hydrogenated zinc oxide thin films ». Solar Energy Materials and Solar Cells 163 (avril 2017) : 255–62. http://dx.doi.org/10.1016/j.solmat.2017.01.030.

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Prasad, S. V., et J. S. Zabinski. « Tribological behavior of nanocrystalline zinc oxide films ». Wear 203-204 (mars 1997) : 498–506. http://dx.doi.org/10.1016/s0043-1648(96)07448-0.

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Hüpkes, J., J. I. Owen, M. Wimmer, F. Ruske, D. Greiner, R. Klenk, U. Zastrow et J. Hotovy. « Damp heat stable doped zinc oxide films ». Thin Solid Films 555 (mars 2014) : 48–52. http://dx.doi.org/10.1016/j.tsf.2013.08.011.

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Hickernell, F. S. « Zinc Oxide Films for Acoustoelectric Device Applications ». IEEE Transactions on Sonics and Ultrasonics 32, no 5 (septembre 1985) : 621–29. http://dx.doi.org/10.1109/t-su.1985.31645.

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Maciąg, Andrzej, Piotr Sagan, Marian Kuźma et Volodymyr Popovych. « Zinc oxide films prepared by spray pyrolysis ». EPJ Web of Conferences 133 (15 décembre 2016) : 03004. http://dx.doi.org/10.1051/epjconf/201713303004.

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Sundaram, K. B., et Ashamin Khan. « Work function determination of zinc oxide films ». Journal of Vacuum Science & ; Technology A : Vacuum, Surfaces, and Films 15, no 2 (mars 1997) : 428–30. http://dx.doi.org/10.1116/1.580502.

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Yoshida, Akira, et Akihiro Wakahara. « Zinc Oxide Films Prepared with Undulator Beam ». Japanese Journal of Applied Physics 38, S1 (1 janvier 1999) : 218. http://dx.doi.org/10.7567/jjaps.38s1.218.

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Bouznit, Y., Y. Beggah et F. Ynineb. « Sprayed lanthanum doped zinc oxide thin films ». Applied Surface Science 258, no 7 (janvier 2012) : 2967–71. http://dx.doi.org/10.1016/j.apsusc.2011.11.019.

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Li, Y., K. Wu et I. Zhitomirsky. « Electrodeposition of composite zinc oxide–chitosan films ». Colloids and Surfaces A : Physicochemical and Engineering Aspects 356, no 1-3 (mars 2010) : 63–70. http://dx.doi.org/10.1016/j.colsurfa.2009.12.037.

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43

Han, Jie, et Wei Gao. « Surface Wettability of Nanostructured Zinc Oxide Films ». Journal of Electronic Materials 38, no 4 (30 décembre 2008) : 601–8. http://dx.doi.org/10.1007/s11664-008-0615-0.

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Wang, Xin Zhi, Masaya Nishimoto, Toru Fujii, Kikuo Tominaga, Kei Ichiro Murai, Toshihiro Moriga et You Long Xu. « Deposition of IGZO or ITZO Thin Films by Co-Sputtering of IZO and GZO or ITO Targets ». Advanced Materials Research 1110 (juin 2015) : 197–202. http://dx.doi.org/10.4028/www.scientific.net/amr.1110.197.

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New transparent conducting oxide (TCO) materials, indium-gallium-zinc-oxide (IGZO) and indium-tin-zinc-oxide (ITZO) were deposited on glass substrate by DC co-sputtering using IZO-GZO and IZO-ITO target combinations, respectively. Amorphous indium-gallium-zinc-oxide (a-IGZO) films possessing electron mobility of as high as 12 cm2V-1s-1and resistivity of 0.15Ω・cm could be deposited. Hall mobility was ten times higher than that of amorphous silicon (a-Si), and comparable to that of commercial IGZO thin films. A good electrical resistivity of 0.17Ω・cm with a relatively high mobility of 10 cm2V-1s-1was found for the ITZO films. These values were similar to those observed for the IGZO films in the present study.
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45

Shashin, D. E., et N. I. Sushentsov. « Development of Manufacturing Technology of Photo-Dielectric Sensitive Element of Ultraviolet Range on the Basis of Thin Films of Zinc Oxide ». Herald of the Bauman Moscow State Technical University. Series Instrument Engineering, no 6 (129) (décembre 2019) : 99–109. http://dx.doi.org/10.18698/0236-3933-2019-6-99-109.

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The development of ultraviolet radiation is essential for solving scientific and practical problems. A large number of application areas related to the registration of ultraviolet radiation requires the expansion of the list of materials used and the creation of new technologies for the production of ultraviolet radiation detectors. Zink oxide thin films are widely used in recording and measuring devices for the ultraviolet range, due to its wide bandgap (3.37 eV) and unique optical characteristics. The purpose of the work is to create a technology for the manufacture of photodielectric sensing element of the ultraviolet range based on zink oxide thin films. To achieve the goal, the following tasks were set and solved: to obtain an experimental sample of the photodielectric-sensing element of the ultraviolet range, investigate the photoelectric effect in zinc oxide films obtained by reactive magnetron sputtering, determine the optimal voltage and frequency of the measuring signal for the operation of the photodielectric sensing element of the ultraviolet range. The article describes the equipment and the sequence of technological operations for the production of thin films of zinc oxide and conducting electrodes by magnetron sputtering. The optimal voltage and frequency of the measuring signal for the sensing element are investigated. The spectral sensitivity of the element in the ultraviolet range was determined.
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Aranda, Alejandro, Richard Landers, Patricio Carnelli, Roberto Candal, Hugo Alarcón et Juan Rodríguez. « Influence of silver electrochemically deposited onto zinc oxide seed nanoparticles on the photoelectrochemical performance of zinc oxide nanorod films ». Nanomaterials and Nanotechnology 9 (1 janvier 2019) : 184798041984436. http://dx.doi.org/10.1177/1847980419844363.

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The present article examines the synthesis and characterization of zinc oxide nanorods grown on zinc oxide and silver nanoparticle seeds. Zinc oxide seeds were electrodeposited on a support of fluorine-doped tin oxide glass and heat-treated at 380°C. Silver nanoparticles were then deposited on this substrate, which was heat-treated at 160°C. Their presence was confirmed using ultraviolet–visible spectroscopy, by observing an absorption peak around 400 nm, corresponding to surface plasmon resonance. Growth of zinc oxide nanorods was achieved in a chemical bath at 90°C. The obtained films were analyzed by cyclic voltammetry, X-ray diffraction, and scanning electron microscopy. They consisted of zinc oxide with a Wurtzite-type crystal structure, arranged as nanorods of 50 nm. X-ray photoelectron spectroscopy exhibits peaks attributed to silver (0) and to the formation of silver oxide on the silver nanoparticle surface. In addition, two types of oxygen (O 1 s) were observed: oxygen from the crystalline network (O–2) and chemisorbed oxygen (–OH), for the seed and the nanorod films, respectively. The nanorods grown on zinc oxide seeds with silver deposits had a round shape and greater photoactivity than those grown without silver. This difference is attributed to the additional reflection that silver provides to the light reaching the film, thereby increasing the photogeneration from the charge carriers.
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El Jouad, Mohamed, El Mehdi Bouabdalli, Samira Touhtouh, Mohammed Addou, Nadège Ollier et Bouchta Sahraoui. « Red luminescence and UV light generation of europium doped zinc oxide thin films for optoelectronic applications ». European Physical Journal Applied Physics 91, no 1 (juillet 2020) : 10501. http://dx.doi.org/10.1051/epjap/2020200133.

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In the present work, the Europium doped Zinc Oxide (ZnO: Eu) thin films were elaborated using spray pyrolysis technique. We are interested in investigating the structural properties, photoluminescence (PL) and third harmonic generation (THG) of the elaborated films. The structural properties of as-prepared thin films were characterized by X-ray diffraction (XRD). It confirms that all deposited thin films of Europium doped Zinc Oxide are crystallized in the hexagonal wurtzite structure. Both undoped and doped europium thin films show strong preferred c-axis orientation. Photoluminescence (PL) emission from Europium doped Zinc Oxide thin films, under excitation by 266 nm, shows characteristic transitions of Europium (5D0 → 7F0, 5D0 → 7F1, 5D0 → 7F2, etc.). It reveals the good incorporation of Eu3+ ions in the ZnO host. Additionally, the 5D0 → 7F2 is the most intense transition usually observed for Eu3+ embedded in materials of Zinc Oxide lattice. The dependence of third-order nonlinear susceptibility on doping rate was evaluated. The highest nonlinear susceptibility χ 3 is obtained for the 5% Europium doped ZnO sample.
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Eleruja, M. A., A. V. Adedeji, G. O. Egharevba, J. N. Lambi, M. S. Akanni, C. Jeynes et E. O. B. Ajayi. « Preparation and characterization of undoped zinc oxide and uranium doped zinc oxide thin films ». Optical Materials 20, no 2 (septembre 2002) : 119–23. http://dx.doi.org/10.1016/s0925-3467(02)00057-5.

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Tomaev, V. V., V. A. Polischuk, T. A. Vartanyan, S. V. Mjakin, N. B. Leonov et A. A. Semenova. « Studies of Zinc and Zinc Oxide Nanofilms of Different Thickness Prepared by Magnetron Sputtering and Thermal Oxidation-=SUP=-*-=/SUP=- ». Оптика и спектроскопия 129, no 7 (2021) : 937. http://dx.doi.org/10.21883/os.2021.07.51085.1677-21.

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Polycrystalline zinc films with the thickness of about 20, 40, 60, and 80 nm and mainly granular morphology comprising nearly spherical particles involving hexagonal crystals are obtained by magnetron sputtering on cover glass supports. Subsequently, the prepared layers were subjected to thermal oxidation in the air to obtain transparent zinc oxide layers. The synthesized films are studied by SEM and UV-vis spectroscopy. Based on the obtained spectra, optical properties of the layers are studied as a function of their thickness. The optical band gap Eg for the films with the thickness from 40 to 80 nm is estimated on the level about 3.28 eV similar to the reference value 3.3 eV for bulk zinc oxide, while for the thickness of 20 nm Eg slightly drops to about 3.24 eV. Keywords: zinc; zinc oxide; nanolayers; magnetron; oxidation; surface morphology; transparency; optical bandgap.
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Wong, Ching Hong, Chee Leung Mak et Kin Hung Wong. « Potentiostatic Deposition of Zinc Oxide on Flexible Substrate ». Advances in Science and Technology 75 (octobre 2010) : 43–48. http://dx.doi.org/10.4028/www.scientific.net/ast.75.43.

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Transparent zinc oxide (ZnO) films on flexible copper-coated polyethylene terephthalate (PET) sheet have been grown by a potentiostatic cathodic deposition technique using aqueous zinc nitrate as electrolyte. ZnO films were fabricated using different deposition parameters such as applied potential, electrolyte concentration and bath temperature. Their structural and optical properties were characterized by X-ray diffractometer, scanning electron microscope, diffuse reflectance UV-VIS spectrophotometer and photoluminescence spectrometer. The effects of these deposition parameters on the structural and optical properties of the fabricated ZnO films have been investigated. On the basis of our results, we demonstrate that high quality ZnO films have been successfully grown on flexible polymeric substrates using a low temperature potentiostatic cathodic deposition technique.
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