Materials Literature
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To make full use of the strength of carbon nanotubes in a composite, it is important to have a high-stress transfer at the matrix−nanotube interface via strong chemical bonding. This paper investigates the possible polyethylene−nanotube bonding with the aid of a quantum mechanics analysis. The polyethylene chains were…
Human estrogenic 17beta-hydroxysteroid dehydrogenase (17beta-HSD1), a member of the short chain dehydrogenase/reductase (SDR) family, is responsible for the biosynthesis of all active estrogens. The crystal structures of two C19-steroid ternary complexes (17beta-HSD1-androstanedione-NADP and 17beta-HSD1-androstenedion…
Abstract An ellipsometric study was carried out in order to investigate the photoinduced change of the refractive index (Δ n ) of a series of diarylethenes across the entire spectral range 260–1700 nm. This technique allowed examination of the influence of the resonance conditions on the refractive index. Changing the…
The effects of total ionising radiation dose upon commercial off-the-shelf semiconductors fitted to satellites operating in low Earth orbit (LEO) conditions was evaluated. The evaluation was performed for the Korea Institute of Technology SATellite-1, (KITSAT-1) which was equipped with commercial solid state component…
The formation of reaction zone morphologies periodic in time and space can be considered as a manifestation of the Kirkendall effect accompanying interdiffusion in the solid state. In a diffusion-controlled interaction, the Kirkendall marker plane can bifurcate, which is attributed to diverging vacancy fluxes in the r…
A new family of glasses based on Bi2O3 was found in the systems xZnO · (0.30 − x)M2O · 0.70Bi2O3 (M = Li, Na) in the range 0.00 ≤ x ≤ 0.20 containing 2.0 mol% of V2O5. Density, molar volume, optical band gap and dc conductivity of these glasses have been investigated. The position of the absorption edge and hence the…
Mixed-layer illite/smectite (I/S) clays were analyzed from 22 deep exploration wells from the Jeanne d'Arc Basin on the Grand Banks offshore Newfoundland, the host of large commercial hydrocarbon accumulations discovered in the last two and a half decades. The fine fraction of the clays (<0.1 µm) consists mainly of…
Abstract In this paper, synthesis and characteristic of arylamine‐type molecules, particularly triphenylamine are discussed. An overview of the physical properties and chemical characteristics of these types of molecules is provided. Different synthesis methods and mechanisms involved for the production of these molec…
This paper summarizes the results of systematic studies of field electron emission from detonation nanodiamond coatings corresponding to nanodiamond powders of different modifications. The role of the chemical composition of the surface of detonation nanodiamond particles in field emission mechanisms is discussed. Fie…
The short-range order and electron structure of amorphous silicon nitride SiNx (x<4/3) have been studied by a combination of methods including high-resolution X-ray photoelectron spectroscopy. Neither random bonding nor random mixture models can adequately describe the structure of this compound. An intermediate model…
Abstract The solubility of stearic acid polymorphs B and C in methanol, 2‐butanone, decane and hexane was measured using a precise gravimetric method. Stearic acid is a molecule with 18 carbons that is highly nonideal in solutions and experimental data show strong deviations from the solubility prediction for ideal sy…
Solid Oxide Fuel Cell (SOFC) is a solid-state electrochemical device that converts the chemical energy of a fuel directly into electrical energy. Due to its multi-fold inherent advantages SOFC is projected as the power source for the future generation. All over the world, extensive research activities are being pursue…
Abstract Vibrational (IR and Raman) spectra for the metal‐free phthalocyanine (H 2 Pc) have been comparatively investigated through experimental and theoretical methods. The frequencies and intensities were calculated at density functional B3LYP level using the 6‐31G(d) basis set. The calculated vibrational frequencie…
The performance of environmentally friendly water-based polyurethane dispersions (PUD) for waterproof breathable coating was studied. The effect of the nature of PUD, number of coatings, incorporation of additives, and processing conditions on the breathable properties of cotton fabric was evaluated. The relative prop…
Diamond (carbon) and silicon powders were mixed and HIPed under temperatures of 1300°–1500°C and pressure at 50 MPa for 30 min. When heated at >1300°C, the products were >90% sintered compacts. Density and bending strength were measured. The highest values of 3.3 g/cm 3 and 750 MPa were obtained when the startin…
Abstract The influences of branch content on the miscibility of octene LLDPE made by metal‐locene catalyst (m‐LLDPE) and by Ziegler‐Natta LLDPE (ZN‐LLDPE) in LDPE were investigated with rheological methods. Dynamic and steady shear measurements were carried out in a Rheometrics Mechanical Spectrometer 800. Here, m‐LLD…
We report the synthesis and physical properties of four novel bent-core compounds, containing an azo linkage and alkyl terminal chains. It is found that, except for the lowest homologue, all the materials are liquid crystalline, exhibiting columnar or tilted polar smectic phases. In one of the compounds a reversible p…
The 3.3-kJ dense plasma focus (DPF) device is used to deposit diamond-like carbon thin films by ablating the high purity graphite fitted to the top of the anode. The plasma focus dynamics was observed using shadowgraphic method to confirm the symmetrical current sheath dynamics and to outline the thin-film deposition…
Abstract Summary: In situ microfibrillar poly(ethylene terephthalate) (PET)/polyethylene blends (MRB) were successfully fabricated by slit‐die extrusion‐hot stretching‐quenching. The morphology of this new material is mainly influenced by the composition and the hot stretching. Appropriate PET concentrations and a com…
The possible use of modified nanodiamond powders in heterogeneous and electrochemical oxidation catalyses is analyzed. It is shown that the efficiency of oxidation catalysis depends on the content of atomic oxygen. The inference is drawn that the electrochemical modification of the surface of nanodiamond powders in a…