Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Density functional calculations are performed to study the interaction of molecular and atomic hydrogen with (5,5) and (6,6) single-wall carbon nanotubes. Molecular physisorption is predicted to be the most stable adsorption state, with the molecule at equilibrium at a distance of 5-6 a.u. from the nanotube wall. The…
Abstract Summary: The temperature dependence of the structure of either cross‐linked or non‐cross‐linked ultra‐high‐molecular‐weight polyethylene (UHMWPE) fiber compacts was studied by synchrotron microbeam wide‐angle X‐ray scattering (WAXS), focusing on the fiber‐fiber interface. The phase transition sequence is: mel…
Softness is an important property of textile fibers, and animal fibers in particular. At present, there is no reliable method for objectively evaluating fiber softness. This paper examines a simple technique of such evaluations by pulling a bundle of parallel fibers through a series of pins. Softer fibers with lower b…
An overview is given of our recent IR spectroscopic, optical, electrokinetic, and microscopic studies on polyelectrolyte multilayers (PEMs), built up using the consecutive layer-by-layer technique, their interactions, and application possibilities. The influence of pH on the deposition of PEMs consisting of commercial…
Hydrophobic solid surfaces with controlled roughness were prepared by coating glass slides with an amorphous fluoropolymer (Teflon® AF1600, DuPont) containing varying amounts of silica spheres (diameter 48 μm). Quasi-static advancing, θA, and receding, θR, contact angles were measured with the Wilhelmy technique. The…
The microstructural evolution of nanocrystalline anatase TiO 2 during high‐energy planetary ball milling was studied. The results show that mechanical activation induces the transformations of nanocrystalline TiO 2 from anatase to srilankite and rutile at room temperature and under ambient pressure. As the milling tim…
Thermal poling of silica-lead glass-silica waveguides formed by laser ablation of lead glass and e-beam evaporation of the silica cladding is reported. A large nonlinearity localized within the Pb-glass layer was found by scanning the probe laser beam across an angle-polished sample, and a peak second-order nonlinear…
This paper considers an optimization technique in which the objective is attained via alterations to the physical geometry of the system. This optimization framework, to be considered in the context of electron guns, is known as optimal shape design. Optimal shape design has been used in a number of applications inclu…
By exploiting nuclear magnetic resonance (NMR) techniques along with novel applications of saturation difference analysis, we deciphered the functions of the previously uncharacterized products of three bacterial genes, rbsD, fucU, and yiiL, which are part of the ribose, fucose, and rhamnose operons of Escherichia col…
Stearic acid was incorporated into whey protein through emulsification to produce films. Whey protein films were prepared by dispersing 6.5% protein in distilled water. Glycerol was the plasticizer agent. Stearic acid was added at different levels (0.0 to 1.0%) and the films were analyzed at different pHs (5.0, 6.0, 7…
This paper presents a new processing method to produce nanotube reinforced composites by using single-walled nanotube (SWNT) bucky paper as reinforcement. The SWNT bucky paper is an entangled mat of SWNTs, which is a highly porous mesh structure. To successfully produce SWNT bucky paper reinforced composites, it is es…
Solutions of alkanethiol-protected Au nanoparticles undergo a slow aging process over a period of several days, which dramatically reduces their reactivity in a place-exchange reaction with disulfides. This behavior was tentatively attributed to the reorganization of the most reactive binding sites (e.g., defect sites…
Resonant photon absorption in the GHz range was observed via low-temperature micro-SQUID magnetization measurements of the spin ground state S = 1/2 of the molecular complex V 15 . A simple single-molecule interpretation is proposed. The line width essentially results from intra-molecular hyperfine interaction. The re…
Multiple new materials are being adopted by the semiconductor industry at a rapid rate for both semiconductor devices and packages. These advances are driving significant investigation into the impact of these materials on device and package reliability. Active investigation is focused on the impact of back-end-of-lin…
The LaMg12-based nanocrystalline alloys were prepared by ball-milling as-cast LaMg12 alloy with Ni powders. The electrochemical charging and discharging in KOH solution of the ball-milled LaMg12-based nanocrystalline alloys succeeded due to the formation of the metallic Ni particles highly dispersed through nanocrysta…
Abstract Intercalative hybrid materials, comprised of polypyrrole (PPy) chains interleaved with the layers of MoO3, have been synthesized using concomitant ion exchange reaction. The (PPy)xMoO3-pressed pellets show a semiconducting-like transport with an activation energy of 0.2 eV. The MoO3 host layers play a dominan…
Five fluid tilted mesophases are observed in a series of achiral banana-shaped compounds. The terminal chain length is the pertinent molecular parameter which induces the polymorphism change. All the phases, refer to tilted lamellar structure without in-plane order in the layers. The observation of monolayer, bilayer,…
Adlayers of 15-crown-5-ether-substituted cobalt(II) phthalocyanine (CoCRPc) were prepared by immersion of either Au(111) or Au(100) substrate into benzene-ethanol (9:1 v/v) mixed solutions containing CoCRPc. In situ STM imaging was carried out after transferring the CoCRPc-modified Au crystals into aqueous HClO(4) sol…
Because of the deleterious effects of sulfur emissions from motor vehicles, government regulatory agencies in several countries have been controlling and gradually reducing the sulfur content of fuels. This article discusses some of the test methods that have been developed for sulfur determination in fuels. Four test…
Abstract SrTiO 3 was plastically deformed in compression along different crystal axes between room temperature and 1800 K. Data obtained from deformation experiments as well as from light optical and electron optical studies are presented. Irrespective of the compression axis orientation, the material exhibits a stron…