Materials Literature
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The magnetic and dielectric properties of EuMn2O5 and BiMn2O5 crystals are investigated over a wide range of temperatures 4.2–250 K, including the range T≫T N ≃40 K. Significant departures from the Curie-Weiss law are observed in both crystals for the magnetic susceptibility in the paramagnetic range; they are attribu…
Abstract The new coordination compounds trans ‐[Pt(H)X(PPh 3 ) 2 ] with NCN‐ and C(CN) 2 ‐functionalized anions (X − = [N(O)C(CN) 2 ] − , [NO 2 NCN] − , [N{C(CN) 2 } 2 ] − , [NCC{C‐(CN) 2 } 2 ] − , have been characterized by 1 H‐, 31 P‐, 13 C‐NMR, and IR spectroscopy and elemental analyses the crystal structures of tr…
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Abstract Miscibility behavior and rheological properties with mechanical spectroscopy study of both poly(3‐hydroxybutyrate) (PHB)/poly(ethylene oxide) (PEO) and biodegradable synthetic aliphatic polyester (BDP)/linear low density polyethylene (LLDPE) were investigated. Blends of BDP with LLDPE were immiscible, showing…
Abstract Lecithin in cosmetic emulsions produces a unique “skin feel,” which can be related to its rheological properties. In this study, water‐in‐oil (w/o) and oil‐in‐water (o/w) emulsions were made from a cosmetic‐grade caprylic/capric triglyceride with deoiled lecithin and hydroxylated lecithin. Synthetic surfactan…
Elevated temperature true stress-true strain curves have been determined for the isothermal deformation of the metastable β titanium alloy Ti-10V-2Fe-3Al in both the β and (α + β) phase fields using hot compression testing. The flow stress behaviour of the alloy, in two initial microstructural conditions, has been cor…
Liquid-crystal-induced circular dichroism (LCICD) measurements have been made to investigate the structure of smectic-${C}_{\ensuremath{\alpha}}^{*}$ using liquid-crystal-mixture systems, in which zero spontaneous polarization ${P}_{S}$=0 or infinite pitch is realized. Two main observations are as follows: (1) LCICD s…
No abstract available.
The possibility of using amorphous silicon and germanium films prepared by magnetron sputtering as components in uncooled microbolometers has been analyzed experimentally and results are presented. Amorphous silicon and germanium films having activation energies of 0.135 and 0.2 eV, and resistivities of 50 and 0.4 kΩ·…
The corrosion of zinc in sulphamic acid containing various isomer of toluidines has been studied. In plain sulphamic acid, the corrosion increases with the acid concentration and temperature. An increase in the concentration of the inhibitor increases the inhibition efficiency the order of inhibition efficiency in 0.1…
Based on high-resolution electron microscopy images and convergent-beam electron diffraction patterns, structural models of decagonal quasicrystals, which have pentagonal atom-cluster columns and belong to the space groups P10m2 and P105/mmc, have been contructed by the section method. The model for the space group P1…
The two-fold degenerate alignment of nematic liquid crystals provided by obliquely evaporated SiOx layers was studied as a function of temperature. A temperature induced anchoring transition from tilted to planar alignment with more than 80 degrees between their preferred directions was found. The director in the two-…
Three new phospholipid diols, bis[2-(2-hydroxyethyldimethylammonio)ethyl]diethylene octadecylamine diphosphate (BDODP), bis[2-(2-hydroxyethyldimethylammonio)ethyl]diethylene hexadecylamine diphosphate (BDHDP), and bis[2-(2-hydroxyethyldimethylammonio)ethyl]diethylene dodecylamine diphosphate (BDDDP), together with 1,4…
We present the first systematic investigation of the differences among reference-quality ellipsometrically measured pseudodielectric function 〈ε〉 spectra of crystalline Si, which are nominally used to approximate the bulk dielectric function of this material. In addition to the expected influence of residual overlayer…
Many factors should be considered in the selection of chemical protective clothing, but the majority of selections are based on manufacturers' permeation data composed of average results for three replicates; usually no information about variability is provided. It was hypothesized that variability across batch lots m…
Abstract The theory of interdiffusion of a pair of components in multicomponent polymer mixtures is reviewed from a statistical point of view, and the foundation of the “fast” and “slow” mode theories, as well as the more recent “ANK” theory of interdiffusion is critically examined. The ANK theory reproduces the resul…
A novel InGaAs/InP micromachined thermoelectric sensor is presented. The key features of the reported sensors are the high thermal resistivity and high mobility of InGaAs lattice matched to InP, combined with a value of Seebeck coefficient that is acceptable for such applications. The anisotropic and selective surface…
Raman spectroscopy was applied to silicon carbide/carbon continuous fibre-reinforced ceramic matrix composites to study the microstructure and composition changes in the fibres in the matrices after the consolidation of the composite at high temperatures by hot pressing, and also the stress distributions in the compos…
Poly[4-(4‘,4‘,5‘,5‘-tetramethyl-3‘-oxido-1‘-oxylimidazolinium-2‘-yl)-1,2-phenylenevinylene] ( 1 ) and poly[4-[(3,5-di- tert -butyl-4-oxyphenyl)(3,5-di- tert -butyl-4-oxocyclohexa-2,5-diene-1-ylidene)methyl]-1,2-phenylenevinylene] ( 2 ) were synthesized via the polymerization of 2-bromo-4-[1‘,3‘-bis( tert -butyldimethy…
Crack-free and transparent PbTiO3 thin films with a perovskite structure were deposited on NaCl (100), Si(111), and fused quartz substrates by the sol-gel method. The crystal structure, morphology, domain structure, composition, and optical properties of the films were characterized by means of x-ray diffraction, tran…