Materials Literature
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Abstract Nanocomposites based on an ethylene–vinyl acetate copolymer (27 wt.‐% vinyl acetate) and multiwall carbon nanotubes (MWNTs) have been prepared by melt blending and their thermal degradation and flame retardant properties have been evaluated. Special attention has been paid to the influence of the nanotube nat…
We calculate the optical properties of carbon nanotubes in an external static electric field directed along the tube axis. We predict strong Franz-Keldysh oscillations in the first and second band-to-band absorption peaks, quadratic Stark effect of the first two excitons, and the field dependence of the bound exciton…
In magnetoresistive (MR) studies of magnetic multilayers composed of combinations of ferromagnetic (F) and non-magnetic (N) metals, the magnetic moment (or related 'spin') of each conduction electron plays a crucial role, supplementary to that of its charge. While initial analyses of MR in such multilayers assumed tha…
We show it is possible to assemble nanoparticle-polymer layers in a controllable manner dictated by the difference in nano-object morphology and dielectric properties. A thin (10-100 nm) layer of the two components is spin coated onto a solid substrate and the system thermally aged to activate a cross-linking process…
Abstract The assessment, control, and mitigation of reaction hazards is primarily based on the use of kinetic models. These kinetic models are used for the assessment of reaction hazards, the operation and control of the reactor, the design of emergency relief systems, estimation of the consequences of a reaction runa…
This paper describes a cation exchange approach to the synthesis of metal chalcogenide core-shell particles with the same size but a number of different compositions. This method begins with the preparation of colloidal spheres of amorphous Se (a-Se), followed by their reaction with Ag atoms to form Se@Ag2Se spheres.…
The knowledge of chemical and magnetic conditions at the Co40Fe40B20 / MgO interface is important to interpret the strong annealing temperature dependence of tunnel magnetoresistance of Co-Fe-B / MgO / Co-Fe-B magnetic tunnel junctions, which increases with annealing temperature from 20% after annealing at 200C up to…
The General Thermodynamic Theory of Sintering, formulated by the author in 1998 is given. This theory is applied to the problem of swelling of materials under conditions of radiation. Driving forces, caused by the presence of the evolution of heat in the volume of a sample (electric contact, hf, inductive heating or p…
Recent neutron scattering measurements reveal spin and charge ordering in the half-doped nickelate, ${\mathrm{La}}_{3∕2}{\mathrm{Sr}}_{1∕2}{\mathrm{NiO}}_{4}$. Many of the features of the magnetic excitations have been explained in terms of the spin waves of diagonal stripes with a magnetic coupling structure which is…
The different mechanisms involved in the alloying of epitaxial nanocrystals are reported in this letter. Intermixing during growth, surface diffusion and intra-island diffusion were investigated by varying the growth conditions and annealing environments during chemical vapor deposition. The relative importance of eac…
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCalcium Carbonate Formation and DissolutionJohn W. Morse, Rolf S. Arvidson, and Andreas LüttgeView Author Information Department of Oceanography, MS-3146, Texas A&M University, College Station, Texas 77843, and Department of Earth Science MS-126, Rice University, 6100 Main S…
pH-gesteuert: Eine Reihe zwölfkerniger Koordinationscluster von NiII und CoII mit isostrukturellen Gerüsten wurde mit zuvor unerreichter Kontrolle über Struktur und Zusammensetzung hergestellt. Je nach pH-Wert lassen sich andere Cluster in Lösung durch Kryospray-Massenspektrometrie nachweisen. Die Anordnung der Metall…
The authors performed resistance switching of a VO2 film grown on the Al2O3 substrate by applying electric pulses. As a consequence, Joule heat of about 1W has been induced in a 15×50μm2 area between the two electrodes. Using synchrotron-based infrared microspectroscopy, the authors mapped the propagation of Joule hea…
Abstract Three new chromophores containing an electron‐donating dithiafulvene (DTF) unit attached to derivatives of retinal, diethynylethene (DEE), and dihydroazulene (DHA), respectively, are synthesized and characterized by using X‐ray crystallography as well as absorption and fluorescence spectroscopy. In general, t…
The intensity change upon crystal rotation of selected Raman modes of a lead-zirconate-titanate-based relaxor has been examined from both theoretical and experimental viewpoints. Periodic functions, representing intensity ratios between Raman bands as a function of crystal orientation, have been theoretically derived…
Viewing angle switching from a wide viewing angle to a narrow viewing angle has been studied. Conventional multidomain vertical alignment (VA) mode offers the advantages of a high contrast ratio (CR) not only in the front view but also in the wide viewing directions only if compensation films such as a negative C plat…
Specific-heat measurements are reported near the Curie temperature (TC=320K) on triglycine sulfate. Measurements were made on crystals whose surfaces were either nongrounded or short circuited, and were carried out in magnetic fields up to 9T and electric fields up to 220V∕cm. In nongrounded crystals the authors find…
The interface of epitaxial (Pb0.35Sr0.65)TiO3 films on MgO substrates grown by pulsed laser ablation was studied using transmission electron microscopy (TEM). Cross-section TEM studies revealed that the epitaxial films have a lattice mismatch of −6.2% with respect to the substrates. Electron diffraction pattern and hi…
Significant differences in the luminescence properties of dibenzoylmethanate and ditoluylmethanate of boron difluoride bulk crystals and microcrystals were detected. The size-dependent blue-to-green colour change of the luminescence is connected with the band intensity redistribution of monomer and excimer luminescenc…