Materials Literature
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Iron-doped LiNi 0.85 Co 0.1 Al 0.05 O 2 cathode materials with an α -NaFeO 2 structure were synthesized by using co-precipitation and ball-mill methods. The structures of samples were confirmed by using X-ray diffraction, and the sizes and the morphologies of the particles were observed by using scanning electron micr…
In this paper, a compact design of conventional tapered slot antenna (TSA) loaded with the anisotropic zero-index metamaterial (ZIM) for the frequency range of 1 to 10 GHz is presented. The proposed TSA loaded with the ZIM exhibits an increase in the directivity up to 2.6 dB. The designed antenna is fabricated on the…
The development of effective and safe nanotechnology medication with a high cost-benefit ratio is a strategic imperative for public health in Brazil. The lack of information demands sanitary regulation geared to protecting health and the environment. This study seeks to assess the current stage of development, the reg…
In this work, a hybrid solar cell based on Si nanowires (NWs) coated with a polymer (PCBM) is presented. Vertically well-aligned Si NWs were successfully synthesized by a Ag-assisted electroless etching technique with etching depth of ∼3 µm uniformly distributed over the surface of p-type Si wafer. Three-dimensional (…
The elementary reaction of molecular hydrogen elimination from the [B 10 H 11 ] − anion, which is presumably the rate-limiting stage of acid-catalyzed reactions of substitution of exopolyhedral H atoms in the [B 10 H 10 ] 2− decahydro- closo -decaborate anion, has been calculated by the density functional theory metho…
Drugs with good solubility exhibit good oral absorption, and subsequently good bioavailability. Thus, most exigent phase of drug development practice particularly for oral dosage forms is the enhancement of drug solubility. This review describes various traditional and novel methodologies proposed for the solubility e…
Burning rates were measured for samples of the starting mixture of Ni + Al and the same mixture subjected to mechanical treatment in argon and then in water. The dependences of the burning rate on the diameter of the samples of the original and mechanically activated mixtures are similar. The burning rate passes throu…
Deformations in windings can be diagnosed by a reliable and powerful method called sweep frequency response analysis (SFRA). In this work the deviation in the frequency response plots is derived in terms of statistical indicators. Nine statistical indicators have been used for the purpose. These indicators, then, comp…
The results from research on developing and optimizing a method for preparing a catalyst designed for hydrocarbon processing in order to produce carbon materials are presented. The chosen method of catalyst preparation is the mechanochemical activation of a mixture of metal oxides in a planetary mill, allowing the sin…
The degradation of electrical parameters of non-passivated IGZO TFTs is showed, which exhibited the indispensability of a passivation layer. After that, the electrical characteristics obtained by passivating TFTs by SiO2(PECVD) or Al2O3(ALD), is reported. Some results of SIMS and XPS analysis are presented to discuss…
A new iterative learning algorithm of output tracking control for uncertain nonlinear distributed parameter systems is considered in this paper. The iterative learning control scheme based on Newton-type method is constructed. Sufficient conditions for the convergence of this new algorithm are given. Using Green formu…
Abstract A series of bent π-conjugated compounds, 2a, 2b, 3a, and 3b, composed of two tub-shaped dibenzocyclooctatetraene (DBCOT) units with two cyano substituents on each cyclooctatetraene (COT) ring were designed and synthesized by using improved synthetic procedures. The anti- and syn-conformers of 2a, 2b and 3a, 3…
We demonstrate perfect transmission of sound through a rigid barrier embedded with Helmholtz resonators. The resonators are confined within a waveguide and they are oriented such that one neck protrudes onto each side of the barrier. Perfect sound transmission occurs even though the open area of the necks is less than…
In this work, the in situ TiB2 particulates reinforced 2219 aluminium matrix composites were fabricated using the mixed salts method. The microstructural characteristics and mechanical properties of TiB2/2219 Al composites were investigated. The reults show that the composites reinforced with 5 and 10 wt-%TiB2 exhibit…
We demonstrate that the exciton and biexciton emission energies as well as exciton fine structure splitting (FSS) in single (In,Ga)As/GaAs quantum dots (QDs) can be efficiently tuned using hydrostatic pressure in situ in an optical cryostat at up to 4.4 GPa. The maximum exciton emission energy shift was up to 380 meV,…
Abstract As a new technology for flat‐panel displays and general lighting sources, solution‐processed phosphorescent organic light‐emitting diodes (PhOLEDs) unfurl a bright future, due to their merits of high quantum efficiency and easy fabrication. In recent years, great progress has been made in the device performan…
The BaF 2 -ScF 3 system is studied using coprecipitation from aqueous solutions. Compound Ba 3 Sc 2 F 12 is found to form over a wide range (10–60 mol %) of scandium concentrations in the initial solution. At higher scandium concentrations in solution, a new phase of provisional composition BaSc 2 F 8 · 2H 2 O (hexago…
The NiFe thin films were prepared at room temperature by DC sputtering technique from a NiFe target onto silicon wafer, NBK7 and STIM35 glass substrates. The optimal deposition condition of NiFe thin films was obtained to be used for high density magnetic recording applications. The film thickness was determined by th…
Air stable silver nanoparticles (NPs) at a high concentration (up to 0·2M) were synthesised by the reduction in Ag+ ions with glucose in cetyltrimethylammonium bromide (CTAB) solutions, for preparing nano-Ag ink applicable for direct writing on photo paper using a gel ink pen. The reaction was performed at room temper…
The crystal structure of the CL-20 solvate with ɛ-caprolactam in the 1:6 ratio is obtained and studied.