Materials Literature
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The crystalline properties of Be substituted ZnO(BeZnO) films deposited on c-Al2O3 substrates are studied. As Be concentration in BeZnO increases, the lattice parameters of BeZnO increases; the c-axis lattice is more sensitively shifted than the a-axis lattice. The energy band gap of the BeZnO films has been efficient…
Purpose To evaluate the effect of some tetrazole compounds as corrosion inhibitors of copper in HNO 3 at various temperatures. Design/methodology/approach 1‐phenyl‐5‐mercapto‐1,2,3,4‐tetrazole (PMT) was selected as the best inhibitor among the tetrazole compounds tested. Gravimetric and electrochemical techniques were…
The relationship existing between aging conditions, redox behavior, and surface/bulk structural properties of two thermally aged ceria−zirconia mixed oxides, CZ-MO and CZ-SO, is analyzed. The samples were prepared by applying to a fresh Ce 0.62 Zr 0.38 O 2 mixed oxide two alternative aging routines consisting of a red…
A high performance dye-doped cholesteric liquid crystal (CLC) laser is demonstrated by incorporating a passive CLC reflector to the active cell. The polarization-conserved CLC reflector effectively increases the distributed feedback cavity length which, in turn, results in a significant enhancement in lasing efficienc…
[reaction: see text] Oxidation of dilithium tetraphenylporphyrin, Li(2)(TPP), yields the doubly oxidized porphyrin complex [Li(TPP)][BF(4)]. Free TPP appears to be unstable. The crystal structure of [Li(TPP)][BF(4)] reveals that the 16-atom C-N inner ring of the porphyrin consists of alternating single and double bond…
The exchange interaction parameters of Gd monopnictides are deduced from fitting the total energies of different magnetic configurations to those computed within the Heisenberg model. The magnetic structures predicted by first-principles calculations as well as the Curie (Néel) temperatures obtained from Monte Carlo s…
Two manganese(III) tetradentate Schiff-base dimers to which N,N'-dicyano-1,4-naphthoquinonediiminate (DCNNQI) radicals are attached have been selectively synthesized by varying the solvents used in the reactions: [Mn2(5-MeOsaltmen)2(DCNNQI)2].MeOH (1) and [Mn2(5-MeOsaltmen)(2)(DCNNQI)(2)] x 2CH2Cl2.2CH3CN (2) [5-MeOsa…
Organic triazene compounds are stable precursors to diazonium salts for functionalizing single-wall carbon nanotubes (SWNTs) in aqueous media. This method is particularly useful when a target molecule has functionality that will not tolerate diazotization conditions. We illustrate this by detailing the synthesis of a…
The effect of temperature on the structure of LiAlSiO 4 and NaAlSiO 4 liquids has been studied by 17 O 3QMAS NMR spectroscopy using glass samples prepared with different fictive temperatures. The abundance of Al-O-Al and Si-O-Si bridging O linkages increases with increasing fictive temperature, indicating that the rea…
ZnO single crystals implanted with O+ and B+ ions were studied by positron annihilation and Raman scattering measurements. Positron annihilation results show that vacancy clusters are generated by implantation. For the B+-implanted sample, the vacancy clusters have a sufficient increase in size and evolve into microvo…
Abstract Crystals of the iron borides FeB and Fe 2 B were obtained from two different high temperature synthesis routes, viz. in combined copper/gallium flux and under high pressure conditions. Their crystal structures were investigated at room and low temperatures. Structure models from the literature were confirmed.…
The high-temperature dehydroxylation and structural change of talc, Mg 3 (Si 2 O 5 ) 2 (OH) 2 , has been investigated in detail using infrared (IR) spectroscopy. The data (in the region of 20.12000 cm -1 ) on quenched samples show that absorptions from structurally incorporated OH and OD, as well as NH4- like species,…
This paper briefly reviews previous work on the growth of thermochromic VO2 thin films on glass, and then examines and compares three different CVD approaches and two precursor systems for the production of these materials. It is found that atmospheric pressure (AP) CVD using vanadium(IV) chloride (VCl4) and H2O on co…
We have investigated the C−H···O C hydrogen bonding and isothermal crystallization kinetics of poly(3-hydroxybutyrate) (PHB) at 125 °C by using near-infrared (NIR) spectroscopy, which allows us to investigate thick films. The NIR spectrum of a PHB film changes remarkably with the evolution of isothermal crystallizatio…
A uniform nanolayer of europium-doped Gd2O3 was coated on the surface of preformed submicron silica spheres by a Pechini sol-gel process. The resulted SiO2 @ Gd2O3:Eu3+ core-shell structured phosphors were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), field emission scannin…
This review explores the recent chemotherapeutic work on drug delivery using nanoparticles as carriers for the targeted treatment of cancer. Compared to direct drug delivery, delivery through a carrier can increase the efficacy of a drug, but decrease the side-effects by utilizing the enhanced permeability and retenti…
The protective role of iron carbonate films deposited on steel surfaces as by-products of carbon dioxide (CO2) corrosion may be hindered by mechanical film removal due to hydrodynamic forces. Damage to the film is frequently accompanied by severe corrosive attack, which may ultimately result in costly equipment failur…
This study investigated the unique shape of cotton fiber length distribution and explored its main features. One prominent feature revealed by the examination of a multitude of distributions measured on a wide range of cotton samples was the modality of the distribution pattern. Based on the experimental data, signifi…
The main aim of the present study was to predict the most important yarn quality characteristics derived from cotton fiber properties that were measured by means of an HVI system. With this aim 15 different cotton blends were selected from different spinning mills in Turkey. The cotton fibers were processed in the sho…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTMorphology and Structure of Single Crystals of Poly(ethylene glycol)−Poly(ε-caprolactone) Diblock CopolymersJingru Sun, Xuesi Chen, Chaoliang He, and Xiabin JingView Author Information State Key Laboratory of Polymer Physics and Che…