Materials Literature
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Abstract Cellulose derivatives of carboxymethyl cellulose sodium salt (CMC), hydroxypropyl methylcellulose (HPMC), methylcellulose (MC), and enzymatically treated cellulose have been electrospun, and the microstructure of the resulting nanofibers has been analyzed by scanning electron microscopy (SEM). Before electros…
Electrochromic (EC) materials are able to change their optical properties, reversibly and persistently, by the application of an electrical voltage. These materials can be integrated in multilayer devices capable of modulating the optical transmittance between widely separated extrema. We first review the recent liter…
Ein bisschen Farbe ins Leben! An ein Donor-Acceptor-substituiertes Stilben gebundene Antikörper fluoreszieren stark im blauen und grünen Farbbereich. Photophysikalische und Strukturanalysen deuten an, dass die Bindung von Antikörpern die Eigenschaften der angeregten Zustände von Stilben verändert. Derartige Komplexe k…
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.
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.
The Strategic National Stockpile (SNS) was developed by the Centers for Disease Control and Prevention (CDC) to deliver critical medical supplies to the site of a national emergency.1 Situations in which SNS might be deployed are during the release of biological or chemical weapons or during natural disasters. In thes…
Large-scale long continuous FeS(2) nanowire filled carbon nanotubes (CNTs) were one-step synthesized in the presence of NaN(3) in supercritical CS(2) at 500 °C using ferrocene as the iron source. The CNTs have outer diameters in the range of 15-25 nm and the core FeS(2) nanowires inside CNTs are characterized as singl…
Abstract The dynamics of the concentration fluctuations in end‐grafted polystyrene brushes in a theta solvent (cyclohexane) are probed by evanescent wave dynamic light scattering at different wavevectors q and temperatures. When the solvent quality changes from marginal to poor, the relaxation function C ( q , t ) exh…
Linear viscoelastic properties and dielectric behavior of poly(1‐butene)/multiwalled carbon nanotube (MWCNT) nanocomposites were investigated. Dynamic mechanical analysis showed significant increase in storage modulus in the rubbery regime. The tan δ peak temperature remained constant; however, the peak intensity was…
Abstract We present results on the use of ellipsometry as a novel probe for the crystallization kinetics in thin films of a diblock copolymer. Ellipsometry makes use of the change in polarization induced upon the reflection of light from a film‐covered substrate to enable the calculation of the refractive index and th…
The compressive creep characteristics at 1625°C of liquid‐phase‐sintered silicon carbide ceramics containing 5 and 15 wt% of crystalline Y 3 Al 5 O 12 (YAG) as the secondary phase were studied. In the two cases, strains between 10% and 15% were reached without failure. The creep behavior was characterized by a stress…
Synthetic routes leading to the first polyhedral oligosilsesquioxane derivatives incorporating niobium are reported. Tetrasilanol ( c -C 6 H 11 ) 6 Si 6 O 7 (OH) 4 ( 2 ), for which an improved laboratory-scale synthesis is reported, cleanly reacts with Nb(OEt) 5 to afford the dinuclear niobasilsesquioxane [( c -C 6 H…
The alumina–zirconia (Al 2 O 3 –ZrO 2 ) system is considered as one of the most useful nanocomposites, finding widespread applications in structural field. To provide optimal performance, the scale reduction of the initial powder or of the final grain morphology is of particular importance. To accomplish this, we deve…
The occurrence of air-trapping inside poly-eta-caprolactone nanopits was investigated by measuring the contact angles of water droplets on a set of defined nanotopographies. It is shown that the advancing angles follow the Cassie-Baxter theory, thus revealing the presence of air bubbles inside the biodegradable nanopa…
Size effects, such as structure transition, have been reported in small clusters of alkali halide compounds. We extend the study to rare earth sesquioxide (Gd(2)O(3)) clusters which are as ionic as the alkali halide compounds, but have a more complicated structure. In a clean and controlled environment (ultra high vac…
The local structure of yttrium in Y-doped BaCeO 3 compounds was studied using X-ray absorption spectroscopy (XAS) at the Y K-edge. Data analysis shows that the local environment of Y 3+ changes, resulting in a distorted octahedron. The structural distortion found does not depend on the dopant amount at the investigate…
Three transition metals, Ni, Mo, and Ti, were reacted with SiCN at high temperatures, and the reaction products characterized by X‐ray diffraction. It was concluded that TiN is the most suitable interconnect material for the measurement of the electrical conductivity of SiCN at temperatures up to 1400°C. The TiN inter…
The design of coatings is like designing a system. Every coating has one or more specific functions that determine the choice of materials, and its architecture. In the case of environmental barrier coatings the topcoat must be chemically inert to the atmosphere. In high‐temperature applications the stresses arising f…
Abstract Spruce wood boards impregnated with Na 2 S 2 O 3 or Na 2 S 2 O 5 were studied with the cone calorimeter. The presence of Na 2 S 2 O 3 lowered the average heat release rate in comparison to untreated material. The total amounts of CO and CO 2 production were reduced by the treatment and also the specific extin…
The crystalline structures, magnetisms, and magnetotransport properties of ${\mathrm{La}}_{0.7}{\mathrm{Sr}}_{0.3}\mathrm{Mn}{\mathrm{O}}_{3}∕\mathrm{Sr}\mathrm{Ti}{\mathrm{O}}_{3}$ (LSMO/STO) superlattices and ${\mathrm{La}}_{0.7}{\mathrm{Sr}}_{0.3}\mathrm{Mn}{\mathrm{O}}_{3}$ (LSMO) films are studied. The transmissi…