Materials Literature
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Experimental results are compared with a theoretical analysis concerning wall effects on the symmetric mode resonance frequency of millimeter-sized air bubbles in water. An analytical model based on a linear coupled-oscillator approximation is used to describe the oscillations of the bubbles, while the method of image…
Analytic expressions for the cutting line number $\ensuremath{\mu}$ of a single-wall carbon nanotube (SWNT) which gives van Hove singularities for optical transitions are found to exist around $\ensuremath{\mu}=N∕3$ for most SWNTs, where $N$ is the number of cutting lines of the SWNT. However, for metal-2 SWNTs, the c…
Abstract A commercial grade nylon‐6/clay nanocomposite (from Ube industries) is subjected to a large‐scale simple shear orientation process and the resulting morphology is investigated. Both the orientation and aspect ratio of nanoclays, which can be altered by the simple shear process, are studied. The incorporation…
The short-time dynamic properties of colloidal particles in quasi-two-dimensional geometries are studied by digital video microscopy. We demonstrate experimentally that the effective-two-dimensional physical quantities such as the dynamic structure factor, the hydrodynamic function, and the hydrodynamic diffusion coef…
Abstract Secondary fluorescence across phase boundaries is a difficult problem encountered in several electron probe microanalysis (EPMA) situations: diffusion couples; small phases enclosed in a larger phases; eutectic intergrowths; and thin films. In some cases, it is possible to construct nondiffused couples and to…
Abstract A new Monte Carlo technique for the simulation of scanning electron microscopy (SEM) images for an inhomogeneous specimen with a complex geometric structure has been developed. The simulation is based on constructive solid geometry (CSG) modelling, i.e. constructive solid geometry modelling with simple geomet…
Abstract A brief description is given of three databases issued by the US National Institute of Standards and Technology (NIST). These databases, designed principally for applications in Auger‐electron spectroscopy (AES) and X‐ray photoelectron spectroscopy (XPS), provide electron elastic‐scattering cross sections, el…
Underwater explosions are conventionally identified and characterized by their seismic and/or acoustic signature based on spherical models of explosion bubbles. These models can be misleading in cases where the bubble is distorted by proximity to the free surface, the bottom, or to a solid object. An experimental and…
Abstract We present calculated electron stopping powers (SPs) for 10 elemental solids (Al, Si, Cr, Ni, Cu, Ge, Pd, Ag, Pt, and Au). These calculations were made for electron energies between 100 eV and 30 keV, and were obtained using the same basic algorithm as that employed in our previous calculations of electron in…
In order to improve the luminance of blue emission of the plasma display panel (PDP), BaMgAl10O17:Eu2+ (BAM) phosphors were synthesized and were coated with SiO2. It was revealed that the surface coating of phosphors with SiO2 leads to an increase in luminance intensity of PDP devices. This seems to be due to the incr…
Abstract Summary: The vapor‐based synthesis and characterization of a reactive polymer, poly[(4‐formyl‐ p ‐xylylene)‐ co ‐( p ‐xylylene)] ( 1 ), have been reported. The reactive polymer coating enables the immobilization of oligosaccharides via the chemoselective aldehyde‐hydrazide coupling reaction. magnified image
Abstract Summary: A simple compounding technique for the fabrication of polymer nanocomposites with single‐walled carbon nanotubes having exceptional alignment and improved mechanical properties is described. The aligned‐nanotube composite was prepared by dissolving single‐walled carbon nanotubes in a solution of ther…
Abstract The semiconductor electronics industry places significant demands upon secondary electron imaging to obtain dimensional measurements that are used for process control or failure analysis. Tolerances for measurement uncertainty and repeatability are smaller than the spatial resolution of edges in the scanning…
Abstract There is an urgent need for fast, non‐destructive and quantitative two‐dimensional dopant profiling of modern and future ultra large‐scale semiconductor devices. The low voltage scanning electron microscope (LVSEM) has emerged to satisfy this need, in part, whereby it is possible to detect different secondary…
We have studied the low-frequency dielectric properties of the phase-separated manganite ${\mathrm{Pr}}_{0.7}{\mathrm{Ca}}_{0.3}\mathrm{Mn}{\mathrm{O}}_{3}$ as a function of applied magnetic field in the low temperature phase-separated state. The dielectric constant is strongly field dependent and also depends on the…
Abstract The one-pot synthesis of cobalt (Co) oxide nanoparticles in the apoferritin cavities was studied. A detailed survey revealed that the optimum conditions are mixing 3 mM Co(II) ion with 0.5 mg/mL apoferritin in 100 mM HEPES pH 8.3 buffer solution followed by the oxidation of Co(II) ion by the addition of hydro…
A polarization-independent phase-only liquid crystal (LC) phase modulator using a double-layered structure is demonstrated. Two orthogonal LC layers are separated by two ultra-thin anisotropic polymer films. The anisotropic polymeric films not only separate the LC layers but also provide good molecular alignment. As a…
Using thermoforging process, dense Ca3Co4O9 (Co349) thermoelectric oxides have been successfully textured. The various parameters influencing the formation of the Co349-textured material have been investigated. The electrical transport measurements show an anisotropy of the resistivity in good agreement with scanning…
We used trioctylphosphine oxide (TOPO) capped colloidal InP nanocrystals (Q-InP|TOPO) to explore the potential of solution 1H NMR spectroscopy in studying in situ the capping and capping exchange of sterically stabilized colloidal nanocrystals. The spectrum of Q-InP|TOPO shows resonances of free TOPO, superimposed on…
Abstract NISTMonte is a new application for Monte Carlo simulation, of electron transport, X‐ray generation and transmission in complex sample geometries. NISTMonte uses the Mott cross section, to model elastic scattering and the Joy–Luo expression to model energy loss. The ionization cross section is modeled using th…