Materials Literature
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Fourier Transform Infrared Spectroscopy Study of Thermal Annealing Behavior of ECR Pulsed Plasma Deposited Fluorocarbon Thin Films from 1,1,2,2‐Tetrafluoroethane, Labelle, Catherine B., Gleason, Karen K.
Coiled coils consist of two or more amphipathic a-helices wrapped around each other to form a superhelical structure stabilized at the interhelical interface by hydrophobic residues spaced in a repeating 3-4 sequence pattern. Dimeric coiled coils have been shown to often form in a single step reaction in which associa…
The present study was performed to analyse the structure of non-digested and digested collagen type I molecules by atomic force microscopy (AFM). Collagen type I molecules from the bovine skin were diluted with 0.05 N acetic acid, spread on a mica plate, air-dried and observed by non-contact mode AFM in air. Collagen…
Microstructural features of LASER welded duplex stainless steels have been studied from viewpoints of nitrogen distribution and its effects on pitting corrosion resistance. The experiment was conducted by means of 25 kW CO2 LASER welding process without filler metals.Nitrogen supersaturation in ferrite phase due to ra…
Three different unsaturated polyester resins were modified by toluene diisocyanate (TDI). All the resins studied were commercially available. One, 2, and 3% additions of TDI caused important changes of the resins properties. With an increase of TDI concentration gelation times increased. Suppression of the exotherm pe…
Macroporous beads, poly(ethylene glycol dimethacrylate-co-acrylic acid) [poly(EGDMA-co-AAc)], and poly(ethylene glycol dimethacrylate-co-hydroxyethyl methacrylate) [poly(EGDMA-co-HEMA)] were prepared by the suspension polymerization technique in the presence of a porogen agent. Different experimental conditions such a…
Layers of CNx were grown on polished Si(100) wafers and cleaved NaCl(100) substrates by reactive sputtering of graphite in d.c. nitrogen plasma and also by d.c. or r.f. magnetron sputtering of graphite in N2. The deposited layers were studied in situ by XPS and ex situ by Fourier transform infrared spectroscopy (FTIR)…
Little is known about the contribution of allophane and imogolite to induration of soil horizons in the perudic tropics. In this study we observed, to a depth of 10 m, indurated sandy C horizons that contained isotropic translucent fine‐textured coatings in Holocene and Pleistocene alluvial andesitic deposits situated…
The composition and hard segment content of 13 commercial thermoplastic polyurethane elastomers (TPUs) were obtained using 1H-nuclear magnetic resonance (1H-NMR). The properties of the TPUs were studied using differential scanning calorimetry (DSC), wide-angle X-ray diffraction (WAXD), dynamic mechanical thermal analy…
Abstract The skin‐core structure of injection‐molded plates of poly(ethylene terephthalate) (PET) has been investigated using Confocal Micro‐Raman Spectroscopy (CMRS) and Differential Scanning Calorimetry (DSC). CMRS has proved to be a useful tool for finding out about quantitative conformational changes in polymeric…
The morphology of an epitaxial layer defect has been studied in relation to the layer thickness and size/material type of a foreign particle on the starting substrate of a Si epitaxial wafer with (100) surface. As expected, the edge length of a square‐shaped stacking fault or a crystal disorder on the (100) epitaxial…
The impact of surface inhomogeneities on diffusion kinetics in solids is investigated by assuming that the exchange of the diffusing species takes place at active spots or stripes only. Finite element simulations are analyzed on the basis of analytical approximations. Such lateral inhomogeneities lead to an apparent s…
The ab initio model potential (AIMP) method has been proven to produce effective one-electron operators that accurately represent the embedding effects of the cations and anions that consititute crystalline lattices like the KMgF3, KZnF3, and CsCaF3 cubic fluoroperovskites. The combination of these quantum mechanical…
The binary interaction energies between styrene and various methacrylates were determined from newly examined phase boundaries with lattice–fluid theory. Because the blends of polystyrene (PS) and poly(cyclohexylmethacrylate) (PCHMA) were only miscible at high molecular weights when the blends were prepared by solutio…
The effect of Coulomb interactions between electrons on time-resolved two-photon photoemission from a metal surface is investigated theoretically. It is shown by nonequilibrium perturbation theory that the correlation trace (photoelectron intensity as a function of the pump-probe delay time) depends on lifetimes of bo…
In order to better understand some of the factors likely to affect measurements of KC1 extractable acidity, experiments were conducted using synthetic solutions and extracts from a wide range of contrasting soils. The reagents used for measuring exchangeable acidity (i.e., KC1 and KF) were also examined to evaluate th…
The electronic structure of two types of hydrogen storage materials has been investigated by ab initio band structure methods. We show that the helium produced by the radioactive decay of tritium in a palladium matrix remains stable at the octahedral site of the fcc lattice for He/Pd ratio of at least 0.25. Such He pr…
This paper is concerned with a study of the structure and twisting mechanism of sheath fibres in DREF-3 yarn, in which a tracer-fibre technique was used. The yarn was made from a polypropylene-fibre multifilament core and cotton staple-fibre sheath. An analysis of the twist and migration behaviour of the sheath is mad…
The EFISH technique is well known and widely used to determine the efficiency of the second harmonic generation (SHG) of liquid samples. In the first part of this paper, a simple and convenient experimental setup for EFISH measurements is presented. A standard photometric cell was used and the cell was swiveled during…
A silicon shadow mask for evaporation or sputtering of any shape of patterns was fabricated by Al-Delay Masking Process (DMP). Using DMP, a Si high aspect ratio structure having arbitrary number of multiple-depth can be fabricated. By applying two layers of DMP, Si shadow mask with a mechanical alignment structure was…