Materials Literature
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Carbon nanotube (CNT) films were grown using microwave plasma-enhanced chemical vapor deposition. Catalytic cobalt (Co) nanoparticles were deposited on a silicon substrate using pulsed arc deposition. A titanium nitride (TiN) thin film was used as a buffer layer on the substrate in order to prevent the formation of Co…
Strongylophorine-26, a new meroditerpenoid, was recently identified as an inhibitor of cancer cell invasion. This study was undertaken to characterize its mechanism of action. We find that strongylophorine-26 inhibits the motility of MDA-MB-231 breast carcinoma cells on a plastic surface. Upon addition of strongylopho…
Cobalt thin films were produced by metal-organic CVD from C5H5Co(CO)2, at various temperatures and for various deposition times. The films have been grown onto glass substrates with no buffer. The crystalline structure, morphology, and composition of the films were analyzed by X-ray diffractometry (XRD), field-emissio…
The degradation of porous low-dielectric-constant (low- k ) materials, such as porous methyl silsesquioxane (MSQ) and porous chemical-vapor-deposited SiOCH films, by damascene etch and ash processes has been investigated. The influence of etch damage becomes relatively stronger as ash damage improves. The etch damage…
Abstract This paper presents a short overview of the high flexibility and potential of inductively coupled thermal plasmas for the synthesis of nanoparticles and especially high refractory carbide nanopowders. The high energy and temperature of theses plasmas enable the evaporation of all materials allowing the use of…
Abstract Thermoelectrically active and stable perovskite‐type materials e.g. La 1–x Ca x CoO 3 (0<x<0.4), La 1–x Ca x Co 0.99 Ti 0.01 O 3 (0<x<0.2), and Ca 3 Co 4 O 9 have been successfully synthesized using selected precursor compounds. This soft chemistry route allows the control of the elemental composi…
Abstract Nanocomposites based on Styrene Butadiene Rubber (SBR) and Acrylonitrile Butadiene Rubber (NBR) with varying acrylonitrile contents (19%, 34% and 50%, respectively) and octadecyl amine modified and unmodified Na-Montmorillonite clays were prepared. Dynamic mechanical thermal analysis (DMTA) was performed on t…
A new method to prepare polypropylene- graft -polystyrene copolymers with tailored structure has been developed. The ability of a series of copolymers with variable structure to compatibilize the polypropylene−polystyrene blends was evaluated through microscopic observation of the morphology of the blends. The synthes…
This study reports the novel synthesis of nano-sized cellular thin film with high degrees of crystallinity and purity using an electrochemical deposition of green rust 2 (GR2) and its further oxidation. This technique is applicable to substrates with large surface areas of a few square centimeters or more without the…
Abstract We demonstrate a cholesteric liquid crystal‐polymer dispersion where the liquid crystal is encapsulated via polymerization induced phase separation. A polymerizable additive formulation is used to control the liquid crystal droplet size. Encapsulation prevents the flow of liquid crystal thereby preserving the…
BACKGROUND AND PURPOSE: Intraoperative MR imaging (IMRI) has advantages over conventional framed and frameless techniques. IMRI, however, also has some drawbacks, especially related to interpretation of gadolinium-enhanced intraoperative imaging resulting from surgically induced blood brain barrier injury, vascular ch…
A new class of conjugated polyacetylenes having perylene bisimide units and pendant fullerene or porphyrin groups were synthesized and characterized. SEM images displayed the aggregation superstructures of two polymers. The poly( 5 0.1 - co - 4 0.9 ) can form a large quantity of spherical nanoparticles in chloroform b…
A thorough investigation of the adsorption and diffusion of Mg, O, and O(2) on MgO(001) terraces is performed by first-principles calculations. The single Mg adatom weakly binds to surface oxygens, diffuses, and evaporates easily at room temperatures. Atomic O strongly binds to surface oxygens, forming peroxide groups…
The key requirements of nanotube formation are an atomic carbon source and a source of nanometal particles. Carbon nanotubes (CNTs) have been synthesized by an argon/nitrogen microwave plasma torch using a mixture of acetylene and vapor-phase iron pentacarbonyl at the atmospheric pressure. The synthesized CNTs have be…
The crystal transition behavior of δ form syndiotactic polystyrene (sPS) in supercritical CO 2 was investigated in detail by using Fourier transform infrared spectroscopy and differential scanning calorimetry. The empty δ e form sPS was obtained after treating the δ form in supercritical CO 2 of 12 MPa in a range from…
A finite element method is presented to compute three-dimensional eddy current distributions in nonlinear laminated iron cores. In a first step, the core is assumed to have an anisotropic conductivity of zero value in the direction perpendicular to the laminations. In a second step, the eddy currents within the sheets…
Abstract The partial discharge (PD) activity during propagation of electrical treeing in epoxy resin is described. The electrical trees grew in needle‐plane samples without and with an internal barrier up to the final breakdown. The simultaneous tree growth and discharge activity show a correlation between the propaga…
Our previous work demonstrated that ethylenediamine-tetra-acetic acid (EDTA) markedly enhances the apparent activity of commercial xylanase and pectinase enzymes in cotton bioscouring, accelerating degradation and removal of impurities. In this study, we explore how EDTA can improve the efficiency of the enzyme proces…
Abstract The use of di‐2‐pyridyl ketone oxime (Hpko)/X – “blends” (X – = PhCO 2 – , N 3 – , NCO – , acac – , NCS – ) in zinc chemistry yields neutral tetranuclear and cationic pentanuclear clusters. Various synthetic procedures have led to the synthesis of compounds [Zn 4 (OH) 2 (O 2 CPh) 2 (pko) 4 ] · 3MeCN ( 1· 3MeC…
After an introduction regarding polymer blends, this review shows how the enhancement of the degree of compatibility between the constituent components of a polyblend can be made by using different reactive or additive compatibilizers. It also discusses how their presence affects the morphology and the properties of t…