Materials Literature
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The dielectric behavior containing the film thickness dependent dielectric constant, capacitance–voltage (C–V) variation, and the electrical conduction behavior containing the film thickness dependent current density-electric field variation of rf sputter deposited (Ba,Sr)TiO3 (BST) thin films are analyzed based on a…
The role of hydrogen in enhancing the photoluminescence (PL) yield observed from Si nanocrystals embedded in SiO2 has been studied. SiO2 thermal oxides and bulk fused silica samples have been implanted with Si and subsequently annealed in various ambients including hydrogen or deuterium forming gases (Ar+4%H2 or Ar+4%…
We study smectic liquid crystals in random environments, e.g., aerogel. A low-temperature analysis reveals that even arbitrarily weak quenched disorder (i.e., arbitrarily low aerogel density) destroys translational (smectic) order, in agreement with recent experimental results. A harmonic approximation to the elastic…
Surface-enhanced Raman spectroscopic (SERS) experiments on thin films of free base phthalocyanine (H2Pc) with embedded silver clusters are reported. The thin films were produced by thermal evaporation of H2Pc together with different amounts of silver (8, 15 and 26 vol.%). From transmission electron microscopy it turne…
Adsorption of anhydrous hydrogen fluoride (AHF) on surfaces of (100) oriented single-crystalline silicon and the native oxide was investigated by in situ x-ray photoelectron spectroscopy (XPS) at room temperature. A significant component at 687.0 eV binding energy in the observed XPS spectra of the F 1s core level is…
A relation between nitrogen desorption/mercury intrusion porosimetry‐measured pore size and green density of a powder compact is examined with respect to data from the literature, as well as data from the current study on three ceramic oxides. In almost all cases, the relationship is well obeyed. Deviations from the r…
Several compositions in the (50 −x) PbO–xPbF2–50B2O3 (0 ≤ x ≤ 20) mol% vitreous system were systematically characterized at room temperature by infrared and Raman microscopic analysis. A general assignment of the vibrations observed for x = 0 mol% was proposed on the basis of borate units and correlations with other l…
Four copper-film-plated steel cords (abbreviated hereafter as copper-plated cord) with different thickness of copper film from 32 to 90 nm were prepared and their adhesion properties with rubber compound were investigated. Adhesion properties improved with the decrease in the thickness of the copper film. Unaged pull-…
Light scatter is one of the most basic of measurements made in flow cytometry. This unit presents a short commentary on what light scatter is and how it is measured. First, the author describes the basic principles of the scattering of light from small particles such as cells. This is followed by a discussion of metho…
Transmission electron microscopy (TEM) studies of the oxide film on the surface of a zirconium alloy have been performed and the crystallography of interfaces has been analysed. Regions of a peculiar microstructure consisting almost entirely of twins have been discovered in the zirconia film. The TEM results have been…
T his paper reports that the crossing-point temperature (CPT), where the heat conduction diminishes at the centre of a symmetrical exothermically reactive solid (or an assembly of packed solid particles), can be considerably different from the set oven temperature during a transient basket heating procedure for measur…
Two Inceptisols (Typic Placaquept and Typic Epiaquept) with placic horizons were selected from the subalpine forest soils in northern Taiwan to evaluate the characteristics and genesis of the placic horizons commonly found in these soils. The placic horizon in the Placaquept had sharp upper and diffuse lower boundarie…
Alloy thin films of hydrogenated silicon–oxygen–carbon (Si,C)Ox x<2, were deposited and analyzed in terms of changes in structure and bonding as a function of rapid thermal annealing between 600 and 1100 °C using a combination of Fourier transform infrared spectroscopy, Raman scattering and high-resolution transmissio…
We prove stability of the kink solution of the Cahn-Hilliard equation ∂tu = ∂( ∂u − u/2 + u3/2), x ∈ ℝ. The proof is based on an inductive renormalization group method, and we obtain detailed asymptotics of the solution as t → ∞. We prove stability of the kink solution of the Cahn-Hilliard equation ∂tu = ∂( ∂u − u/2 +…
The metal hydride (MH) alloy powder for the negative electrode of the Ni/MH battery was first pulverized and oxidized by electrochemically charging and discharging for a number of cycles. The plate of the negative electrode of an experimental cell in this study was made from a mixture of a multicomponent AB 5 ‐ based…
Abstract Methods are described for obtaining elastomers of controlled network chain-length distributions by restricting the reactivity of the polymer chains to their ends, and then end linking these chains with a multi-functional reactant. The networks of this type that have proved to be of greatest interest consist o…
In order to better understand the effect of fine Cu precipitates on the mechanical properties of body-centred-cubic (bcc) Fe, atomic simulations of bcc Fe with bcc Cu precipitates under mechanical loading were conducted by using the molecular dynamics (MD) method in conjunction with embedded atom method (EAM) potentia…
Nanosize particles of CoFe/sub 2/O/sub 4/ have been synthesized by the citrate precursor technique. Considerably higher coercive force (1.68 kOe) than that obtained by the conventional technique (1.00 kOe) is associated with the nanostructure of CoFe/sub 2/O/sub 4/. These nanosize ferrimagnetic CoFe/sub 2/O/sub 4/ par…
Vapor-deposited Ag and Au films exhibit high surface-enhanced Raman scattering (SERS) sensitivity. With thin metal films, SERS spectra can be obtained by using a “backside” configuration in which the laser light is focused through the substrate onto the metal film/liquid (or gas) interface. Use of the “backside” confi…
Spontaneous selective deposition of poly(p-phenylene vinylene) (PPV) by chemical vapor deposition is demonstrated for substrates treated with PPV-growth-inhibiting layers of iron. The Figure shows a Nomarski image of selectively grown parylene-N (squares) and PPV (black square spiral) integrated onto the same substrat…