Materials Literature
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Multiwall carbon nanotubes (MWCNTs) have been functionalized via addition of undecyl (C 11 -) radicals generated by thermal decomposition of lauroyl peroxide. The functionalized MWCNTs (C 11 -MWCNTs) were characterized by Raman, IR spectroscopy, and thermogravimetric analysis (TGA). Isotactic polypropylene (iPP) and s…
An array of 33 prototype polypeptides was examined as putative contrast agents that can be distinguished from each other based on the chemical exchange saturation transfer (CEST) mechanism. These peptides were chosen based on predictions of the chemical exchange rates of exchangeable amide, amine, and hydroxyl protons…
Thermogravimetry has been used to evaluate the equilibrium constants of the water incorporation reaction in yttrium-doped BaZrO 3 with 20−40% yttrium in the temperature range 50−1000 °C under a water partial pressure of 0.023 atm. The constants, calculated under the assumption of a negligible hole concentration, were…
The structural, electronic, and phonon properties of the cubic and tetragonal phase of ${\text{SrTiO}}_{3}$ and ${\text{BaTiO}}_{3}$ are studied from ab initio. The calculations are performed in the projector augmented wave density-functional theory framework using the local density approximation, gradient corrected f…
Abstract Anisotropic metallic nanoparticles (NPs) have unique optical properties, which lend them to applications such as surface‐enhanced Raman scattering (SERS) spectroscopy. Star‐shaped gold (Au) NPs were prepared in aqueous solutions by the seed‐mediated growth method and tested for Raman enhancement using 2‐merca…
We present results from a detailed experimental investigation of LaFeAsO, the parent material in the series of ``FeAs'' based oxypnictide superconductors. Upon cooling, this material undergoes a tetragonal-orthorhombic crystallographic phase transition at $\ensuremath{\sim}160\text{ }\text{K}$ followed closely by an a…
Amide proton transfer (APT) imaging is a type of chemical exchange-dependent saturation transfer (CEST) magnetic resonance imaging (MRI) in which amide protons of endogenous mobile proteins and peptides in tissue are detected. Initial studies have shown promising results for distinguishing tumor from surrounding brain…
The heat produced by optically excited gold nanorods is used to augment the chemotherapeutic agent cisplatin in killing tumor cells. This combined therapy kills 78% more cells than cisplatin alone, suggesting a synergistic interaction between these treatments.
A facile method for the synthesis of size- and shape-controlled CuInS 2 semiconductor nanocrystals was developed by thermolysis of a mixed solution of CuAc, In(Ac) 3 (molar ratio of CuAc to In(Ac) 3 = 1:1) and dodecanethiol in noncoordinating solvent 1-octadecene (ODE) at 240 °C. CuInS 2 nanoparticles with size of 2 t…
Roll drafting is an important unit operation that transforms fiber bundles into attenuated ones, improving their properties with more efficient material usage. Fibers are thus thrown into a flow field having constraints at both ends incurring layer-to-layer flow shearing, which governs the individual fiber movement. T…
Scatterometry or optical CD metrology (OCD) has become one of the most common techniques in quantitative wafer metrology within the recent years. Different tool configurations are either available in commercial inspection tools or subject of recent and present research activities. Among these are normal incidence refl…
Abstract Hyperbranched polyurethane (HBPU)‐urea/cenosphere hybrid coatings were synthesized by incorporating various concentrations of cenosphere into HB polyester matrix by ultrasonication technique, and this polyester was further used for the preparation of isocyanate terminated HBPU prepolymers by reacting with exc…
Abstract Microcellular composites made from polypropylene and waste ground rubber tire powder using azodicarbonamide as chemical blowing agent have been investigated. A small quantity of SEBS‐ g ‐MA has been added as compatibilizer. The effect of variation in processing variables such as pressure, heating time, and op…
Abstract The viscosity and shear strength of pressure‐sensitive adhesives based on natural rubber (standard Malaysian rubber grade L) were studied with gum rosin and petroresin as the tackifying resins. Effects of the concentration of the tackifying resin and the molecular weight of rubber on the two properties were s…
Abstract Rubber wood was impregnated with styrene and glycidyl methacrylate (GMA) as the crosslinking monomer. Polymerization was accomplished by catalyst heat treatment. Compressive strength both in parallel and perpendicular to fiber directions was measured and improvement was observed for wood polymer composites. B…
A low temperature (60 or 95 °C), “one-pot” procedure for aqueous precipitation of layered manganese oxide core@shell particles is developed, based on the reaction between MnO 4 − and Mn 2+ . Characterization of the particles was carried out using powder XRD, nitrogen adsorption−desorption, FESEM, TEM, and electron dif…
Endothelial cell contraction plays a pivotal role in the increased extravasation of fluid and macromolecules in vascular leakage. Previous studies have indicated that elevation of the adenosine 3',5'-cyclic monophosphate (cAMP) concentration can improve the endothelial barrier function. In analogy with smooth muscle c…
Abstract A new effective method is presented for the easier preparation of macrocyclics from poly(phenyl sulfide)by two steps: (1) depolymerization reaction of poly(phenyl sulfide) with Na 2 S in the presence of weak base, and (2) oxidation reaction of depolymerization products. © 2008 Wiley Periodicals, Inc. J Appl P…
Today, various types of high resolution dimensional metrology instrumentation are in use for a quantitative characterisation of micro- and nanostructures. Although sophisticated ultra high resolution microscopic techniques like SEM and AFM are available, optical methods like microscopy and scatterometry are still of i…
Abstract DLC films were deposited on Si(111) substrates using CH 4 /Ar gas and microwave ECR plasma CVD processes. The energy of the ions impinging on the substrate during deposition was varied by changing the rf self bias voltage developed on the substrate. The bonding characteristics of the deposited films were inve…