Materials Literature
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For the synthesis of colloidal ternary ZnCdSe nanorods, CdSe nanorods were first prepared under a mixture of tetradecylphosphonic acid/trioctylphosphine oxide surfactants at 250 degrees C, and then ZnSe shell layer was grown onto CdSe nanorods at 180 degrees C, forming CdSeZnSe core/shell nanorods. Green-yellow emitti…
Solid amorphous cobalt oxysulfide “CoSOH” obtained by basic aqueous precipitation absorbs gaseous hydrogen up to a limit close to the H 2 /Co molar ratio of 0.5. To understand the nature of this phenomenon, the cobalt compound was characterized before and after hydrogen absorption (XRD, IR, TEM, XPS, inelastic neutron…
The relation between the concentration of free charge carriers and the concentration of copper atoms in Bi2Te3 single crystals doped with copper over a wide range of concentrations has been investigated, with the aim of clarifying the existence of inactive Cu ions. Changes in the concentration of free charge carriers…
Energy recovery is gaining importance in various transportation and industrial process applications because of rising energy costs and geopolitical uncertainties impacting basic energy supplies. Various advanced thermoelectric (TE) materials have properties that are inherently advantageous for particular TE energy rec…
Abstract Various blends of gelatinized cornstarch and two biodegradable polyesters, PCL or PBSA, were prepared via melt processing using a twin‐screw extruder. Distribution of a compatibilizer MDI (methylenediphenyl diisocyanate) was controlled through the processing conditions employed and its effect on the resultant…
High yields of MnS microspheres with novel hierarchical structure were prepared through a simple solution method. Field emission scanning electron microscopy and transmission electron microscopy analyses reveal that the microsphere has a core-shell structure: the interior hollow sphere is covered by a shell consisting…
Die richtige Taktik: Eine ausgeprägte heterotaktische Stereokontrolle kennzeichnet die Ringöffnungspolymerisation von rac-Lactid mit einer Reihe von Bis(phenolato)scandium-Komplexen (siehe Schema). An dieser Stereokontrolle scheint eine dynamische Monomererkennung als Folge der Umwandlung der Konfiguration von Λ zu Δ…
Abstract Composites of wood in a thermoplastic matrix (wood–plastic composites) are considered a low maintenance solution to using wood in outdoor applications. Knowledge of moisture uptake and transport properties would be useful in estimating moisture‐related effects such as fungal attack and loss of mechanical stre…
Brushing up: Experimental polymer-brush heights obtained for different footprint sizes, molecular weights, and surface-grafting densities are analyzed using recent scaling relations obtained from a coarse-grained model. The good agreement between the experimental and theoretical results indicates that the scaling pred…
Growth of gold nanorods is investigated in the presence of ascorbic acid in an aqueous mixed micelle solution of hexadecyltrimethyl ammonium bromide (CTAB) and tetraoctyl ammonium bromide (TOAB) through photochemical reduction of HAuCl 4 ·3H 2 O using 300 nm Hg lamps. The role of the ascorbic acid concentration, [H 2…
Several Schiff-base ligands readily form complexes with methyltrioxorhenium(VII) (MTO) by undergoing a hydrogen transfer from a ligand-bound OH group to a ligand N atom. The resulting complexes are stable at room temperature and can be handled and stored in air without problems. Due to the steric demands of the ligand…
With the increasing amount of structural data, the number of homologous protein structures bearing topological irregularities is steadily growing. These include proteins with circular permutations, segment-swapping, context-dependent folding or chameleon sequences that can adopt alternative secondary structures. Their…
Abstract Polyaniline/cobalt oxide composites were synthesized by an in situ chemical polymerization method with ammonium persulfate as an oxidizing agent. This was a single‐step polymerization process for the direct synthesis of the emeraldine salt phase of the polymer. The polymers were characterized with X‐ray diffr…
We have used neutron diffraction to characterize the diffuse scattering in five single crystals of the relaxor ferroelectric $(1\ensuremath{-}x)\mathrm{Pb}({\mathrm{Mg}}_{1∕3}{\mathrm{Nb}}_{2∕3}){\mathrm{O}}_{3}\ensuremath{-}x{\mathrm{PbTiO}}_{3}$ $(\mathrm{PMN}\text{\ensuremath{-}}x\mathrm{PT})$ with $x=0$, 10, 20, 3…
The electronic environment causes decoherence and dissipation of the collective surface plasmon excitation in metallic nanoparticles. We show that the coupling to the electronic environment influences the width and the position of the surface plasmon resonance. A redshift with respect to the classical Mie frequency ap…
We present a computational investigation on the slow dynamics of a mixture of large and small soft spheres. By varying the size disparity at a moderate fixed composition different relaxation scenarios are observed for the small particles. For small disparity density-density correlators exhibit moderate stretching. Onl…
A novel method has been developed for the preparation of crystalline nanotubes of copper selenide (CuSe). The method was based on template-directed synthesis in which the trigonal Se nanotubes were used as a template-directed reagent. Apart from CuSe nanotubes, one-direction (1D) nanocrystallites of Cu 3 Se 2, Cu 2 -…
We show that lead zirconate titanate thin films undergo local phase decomposition during fatigue. The original remanent polarization of the fatigued film is completely restored after furnace annealing in an O2 atmosphere, following a significant regrowth of a perovskite phase from the pyrochlorelike structure. By comp…
Shape-memory alloys (SMAs) are used as sensors and actuators in most engineering and medical applications and are optimized to exhibit either high stress recovery or high strain recovery. But most binary and ternary Cu-base SMAs are brittle and show low strain recovery due to the coarse grains obtained during solidifi…
With intense femtosecond laser excitation, multiphoton absorption-induced stimulated emission and laser emission in ZnO bulk crystal and nanowires have been demonstrated at room temperature. UV-stimulated emission peaks appeared in both bulk crystal and nanowires when the excitation exceeded certain thresholds, and a…