Materials Literature
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Structural, electrical, and optical properties of nitrogen doped zinc oxide (ZnO:N) thin films deposited by direct current magnetron sputtering are analysed in this work. Nitrogen doping allows creation of p-type semiconducting ZnO thin films for their most important application as light emitting diodes. The scanning…
Molecular mechanics (MM) calculations to analyze the puckering of metalloporphyrins isolated and adsorpted on a graphite layer (0001) as a function of metal ion size and the peripheral substitution are presented. The Consistent Force Field (CFF) program was used with new parameters for metalloporphyrins, which include…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation Subodh Srivastava, Sumit Kumar, Shweta Agrawal, Arpita Saxena, B. L. Choudhary, Shubhra Mathur, M…
Electrical conduction occurs and optical absorbance increases in a high resistive and transparent WO3 film with oxygen deficiencies. Both phenomena were caused by the generation of conduction electrons and electron transition from the valence band to the conduction band. Resistivity depends on the O2 flow rate of sput…
Boron-doped micro-nanocrystalline diamond coating may be successfully prepared on Mo substrate with DC arc plasmas jet deposition device. Along with the increase of doped-boron concentration in the film, two-point resistance measurement indicates that film resistance presents exponential decrease; Raman spectrum test…
Sorption of fission product vapors on metallic surfaces and dust particles is an important safety aspect of HTR reactors. Safety analyses of these reactors are performed using computer codes, such as MELCOR, RADAX, SPECTRA. These codes have sorption models allowing to compute the sorption rates of different fission pr…
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Experimental data obtained from the SPR technique was fitted using the Winspall simulation program to determine the dielectric constant and the thickness of its gold film. Experiment was performed by measuring the reflectance of reflected light against the incoming angle of Kretschmann configuration. Two kind of prism…
In certain alloys non-homogeneous plastic flow is observed. A category of jerky flow, also called the Portevin-Le Chatelier (PLC) effect, is attributed to the competition between dislocation aging by solute atoms and plastic strain rate. In this study, the PLC effect was examined in an aluminum-magnesium alloy using d…
飲食店・食品加工場，清掃業者，地方自治体を対象にアンケートを行い，グリストラップの清掃頻度と費用，排水中の動植物性油脂を利用したCO 2排出量の削減をともなうエネルギー利用の可能性，公共下水道の建設・維持管理について検討を行った．飲食店・食品加工場は，動植物性油脂を含む排水に対する問題意識が低いが，グリストラップ清掃業者や地方自治体は，このような排水に対して高い問題意識があった．排水管の閉塞による追加的な維持管理費用や，環境汚染による社会的費用を，動植物性油脂を排出していた飲食店・食品加工場が負担することになれば，油脂回収装置の導入が進む可能性があることが示された．また，油脂回収装置によって回収できた油脂によって，CO 2排出量の…
DC magnetic measurements have been performed under high pressure for FeSe superconductor (Tc~7 K) for the precise determination of pressure dependence of Tc using miniature diamond anvil cell combined with commercial SQUID magnetometer. FeSe is composed of stacking layers of edge-sharing FeSe4 which is isostructural t…
It has been reported that a sub-wavelength structure can be formed at the surface of glass, into which silver ions are incorporated through ion-exchange, by means of imprint molding at a lower temperature than softening temperature of the glass. In order to apply this technique to practical glass systems used in mold…
The effect of post-sintering heat treatment on the coercivity of Nd–Fe–B based permanent magnets was studied by observing their crystallographic and magnetic microstructures. High-resolution transmission electron microscopy revealed meandering grain boundaries in the as-sintered state, and the smoothness of the bounda…
The frontier molecular orbitals of [C n ] q hydrocarbons, fragments of (n, 0) nanotubes, were considered. Asymptotic estimates for two different sets of frontier molecular orbitals were obtained in the Hückel approximation. The problem was shown to be equivalent to the search for model polyene levels with alternating…
研究了原子层沉积制备氧化铝薄膜的光学性能。以三甲基铝(TMA)和水为前聚体,分别在基板温度为250 ℃和300 ℃的K9和石英玻璃衬底上沉积了Al 2 O 3 光学薄膜。采用分光光度计,X射线光电子能谱(XPS),X射线衍射(XRD),原子力显微镜(AFM),扫描电子显微镜(SEM)等分析手段对薄膜的微结构、表面形貌和光学特性进行了研究。结果表明,原子层沉积法制备的Al 2 O 3 薄膜在退火前后均呈现无定形结构,元素成分接近化学计量比,其表面粗糙度小于1.2 nm,聚集密度高于0.97,光学非均匀性优于1%。同时在中紫外到近红外均有很好的光学性能,适合作为中间折射率和低折射率材料在光学薄膜中得到应用。
We have investigated the magnetic state of Nd0.4Sr0.6MnO3 with the variation of its grain size down to average nanometric diameter (40 nm). The bulk sample is antiferromagnetic (AFM) in nature. However, on reduction of the grain size, emergence of ferromagnetic behavior is experimentally observed. Linear and nonlinear…
At the industrial enterprises (ferrous metallurgy, machine-building, transport, etc.) the percentage share of noise shock provenance is very high.
The structural stability and electronic field emission properties of carbon nanotubes doped with a boron atom in different layers and adsorbed with several H2O molecules, as well as located in the applied electric field, are analyzed by means of the density functional theory based on the first-principles. The results…
0.3at% Ce∶YAG(Y3Al5O12) transparent ceramics was fabricated by a solid state reaction method,with the high pure(≥99.99%) commercial powders α-Al2O3,Y2O3,CeO2 using as raw materials.The ceramic green bodies were sintered in 1750℃ for 10h in vacuum.The linear transmission of the prepared Ce∶YAG ceramics in visible range…
Non-sensitive to the driving voltage polarity and hysteretic free V-shaped electro-optical response exhibiting characteristic switching on and switching off times τ0.1-0.9on ≃ τ 0.1-0.9off ≃ 100/μs at the driving voltage amplitude less than 10V can be achieved in Deformed Helix Ferroelectric Liquid Crystal (DHF) mode.…