Materials Literature
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We report here a detailed experimental investigation on noncovalent functionalization of single-walled carbon nanotubes (SWNTs) with four different metallo-octaethylporphyrins (MOEPs). It has been found that the identity of the center metal of MOEP strongly influences the solubilization of SWNTs. MnOEPs and ZnOEPs suc…
For flyback converter applications, an accurate model of the transformer is necessary for simulation studies, as well as a basis for model-based controller design. In general, transformer modeling has either focused on the winding model, using frequency-domain methods, or on the nonlinear core model, using time-domain…
Abstract Simple impregnation of graphene oxide (GO) in cyclohexane containing Ti(OC4H9)4 or Zr(OC4H9)4, followed by a solvothermal reaction, resulted in the deposition of nanosheets of TiO2 or ZrO2 a few nanometers thick on the reduced GO. In addition, free-standing nanosheets of TiO2 or ZrO2 were formed by calcinatio…
Two ternary-layered chalcogenides, MnBi 4 S 7 ( 1 ) and FeBi 4 S 7 ( 2 ), have been synthesized by using a conventional solid-state reaction method with sealed evacuated quartz tubes. The two isostructural compounds crystallize in the monoclinic space group C 2/ m (12), with unit cell parameters ( 1 / 2 ) a = 12.916(1…
New double perovskites LaPbMSbO6, where M2+= Mn2+, Co2+, and Ni2+, were synthesized as polycrystals by an aqueous synthetic route at temperatures below 1000°C. All samples are monoclinic, space group P21/n, as it is observed from Rietveld analysis of X-ray powder diffraction patterns. The distribution of M2+and Sb5+am…
Unusual growth per cycle (GPC) behaviors, depending on the tris( tert -pentoxy)silanol purge time, were observed in catalytic SiO 2 growth by atomic layer deposition (ALD). Short purge times led to decreases in GPC, and normal saturated GPC was observed for longer purge times, following ideal ALD behavior. When an ext…
Mixed acid and rare-earth (RE) solution were used as the surface modifiers to functionalize multi-walled carbon nanotubes (CNTs). Fourier transform infrared spectra reveal that the carboxylic groups were induced on the surface of acid-functionalized and RE-functionalized CNTs, and the presence of C–N bond suggests tha…
Magnetic properties of some nanocrystalline soft magnetic alloys are evaluated by means of a model obtained from literature. The influence of alloy elements in grain diameter, crystalline fraction and anisotropies are investigated in order to obtain information for the design of nanocrystalline soft magnetic materials…
Epitaxial${\hbox{ZnFe}}_{2}{\hbox{O}}_{4}$thin films were deposited on monocrystalline MgO substrate by dc-sputtering. Ferrites were grown from Zn-O and Fe-O multilayers starting from metallic targets in oxygen atmosphere. The number and thickness of layers were varied holding constant the total thickness (50 nm) and…
Ultrafast preparation of branched poly(methyl acrylate) (BPMA) with high‐molecular weight through single electron transfer living radical polymerization (SET‐LRP) of inimer at 25°C has been attempted, atom transfer radical polymerization (ATRP) at 60°C was also carried out for comparison. Gas chromatography, proton nu…
With respect to high energy demand and increasing price of fossil fuels, alternative energy is a concerned issue worldwide. Waste cooking oils and plastic wastes are attractive as starting materials for value creation due to their high existing volumes and cost saving from waste treatment. Therefore, in this work, liq…
First order Raman absorption in materials with the rock salt crystal structure is forbidden. Its appearance in real crystals results from the presence of vacancies and other defects. For TaxN polycrystalline thin films, we found that imperfections that reduce the coherence length contribute to the appearance of the fi…
Reaction of cerium nitrate and sodium pyrithione in aqueous solution and then crystallization of the product in dimethyl sulfoxide led to the complex of Ce(PT)3(DMSO)2 (PT = pyrithione) (1). Complex 1 was characterized by elemental analysis, infrared spectra, and X-ray crystallography. Combined with sodium bromate, co…
Abstract The partitioning behavior of glutaminase produced from Zygosaccharomyces rouxii in polyethylene glycol (PEG)‐salt aqueous two‐phase systems (ATPSs) was investigated. ATPSs comprising of different PEG‐salts were considered. Binodal data and tie lines generated for the selected systems were analyzed and correla…
Adhesive joints are usually designed to carry in-plane loads, but in many cases they are also prone to transverse loading. On the other hand, the impact response of adhesive joints has received limited attention compared to quasi-static loading. Therefore, the present paper aims to study the influence of superposition…
The redox properties of copper pyridylpyrimidine complexes, which undergo linkage isomerism based on pyrimidine ring rotation, were compared under different coordination environments. A newly synthesized compound, [Cu(Mepypm)(L(Mes))]BF4 (1·BF4, Mepypm = 4-methyl-2-(2'-pyridyl)pyrimidine, L(Mes) = 2,9-dimesityl-1,10-p…
A Hg(2+)-selective chromophoric upconversion nanosystem is achieved by covalently grafting Rhodamine B hydrazide (RB-hydrazide) onto upconversion luminescent nanorod core-shell structures. The prepared β-NaYF4 nanorods are coated with silica and characterized by X-ray diffraction (XRD), transmission electron microscop…
CuInSe2 (CISe) is a prototype material for the I–III–VI chalcopyrites such as Cu(In,Ga)(S,Se)2 (CIGSSe) used as absorber layers in thin film photovoltaic cells. These thin film photovoltaic absorber layers are primarily synthesized by vacuum-based techniques in manufacturing. In this work, we investigate non-vacuum fi…
Abstract The structural evolution of sol–gel‐produced amorphous Mg(x)Ca(1–x)SiO3 silicates is investigated. Mid‐IR Fourier transform infrared spectroscopy and synchrotron X‐ray diffraction are used to confirm the amorphous nature of the as‐prepared silicates, while subsequent in situ synchrotron X‐ray powder diffracti…
Synthetic nanostructures, such as nanoparticles and nanowires, can serve as modular building blocks for integrated nanoscale systems. We demonstrate a microfluidic approach for positioning, orienting, and assembling such nanostructures into nanoassemblies. We use flow control combined with a cross-linking photoresist…