Materials Literature
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A series of binary transition metal phosphides (Ni 3 P, Ni 12 P 5, Ni 2 P, Ni 5 P 4, NiP, NiP 2, FeP, FeP 2, FeP 4, VP 2, CoP) were investigated by solid state 31 P MAS NMR, leading to rather different lineshapes, shifts, relaxation times, and temperature dependences. The electronic structures of these compounds were…
Abstract Wood plastic composites (WPCs) are attracting a lot of interests because they are economic, environmentally friendly, and show fairly good performance. To improve the performance of a wood/polypropylene (PP) composite, an organoclay was incorporated as a nanosize filler in this work. WPCs were prepared by mel…
Abstract We report a novel strategy for preparing epoxy thermosetting systems with low shrinkage and improved flexibility and degradability. Diglycidyl ether of bisphenol A (DGEBA) resin was cured with different proportions of hydroxyl‐terminated hyperbranched polymer (HBP), using ytterbium triflate as a cationic init…
Ni doped ZnO powders were synthesized by a simple dissolution followed by precipitation using zinc acetate, nickel acetate and oxalic acid for different atomic percentages of Ni doping. Proper phase formation was confirmed by x-ray diffraction and the compositional analysis was performed by using x-ray photoelectron s…
I'm forever blowing bubbles: Superstable foams comprising air bubbles stabilized by modified, rigid CaCO3 rods have a bimodal bubble-size distribution. The very high stability and stiffness of the rod-stabilized bubbles means that their spherical shape is retained when dried on glass substrates and that they could be…
A one-pot reaction for the synthesis of 4,4'-diaryl- and 4,4'-diheteroaryl-substituted 2,2'-bipyrroles is described. The new methodology is based on the oxidative coupling of a 2-trimethylstannylated pyrrole and does not require chromatography. These 2,2'-bipyrroles can be used as precursors in a expeditious synthesis…
V. Janovec and J. Privratska developed [Ferroelectrics 204, 321 (1997)] a group theoretical model for the existence of pyromagnetism (or pyroelectricity) within the domain walls of an antiferromagnet (or antiferroelectric). However, their approach did not permit any estimate of magnitudes, or even whether it would be…
Sensoren für Sporen: Mit einem organischen Farbstoff beschichtete Siliciumoxidnanopartikel und ein Europiumkomplex wurden in einem Sensor kombiniert, der einen Anthrax-Biomarker schnell und hoch empfindlich nachweisen kann (siehe Bild; gelbe Punkte: Siliciumoxidnanopartikel, äußere Schale: EuIII-Komplex). Das Verfahre…
Directed crystallization is found in many natural systems, where the inorganic material provides the organism with superior barrier and mechanical properties. Using this principle of controlled nucleation and growth on a biopolymer (pectin) substrate, hollow shells of calcium carbonate were formed in certain reaction…
Narrowing the gap: A compactly fused π-conjugated molecule combines a high-lying HOMO with a low-lying LUMO (Eox−Ered=0.52 eV) and a fairly low-lying LUMO+1 on the bridging unit, giving rise to strong optical charge-transfer transitions. A facile electron transfer has been observed by EPR and NMR spectroscopies.
Hybrid systems consisting of core/shell semiconductor quantum dots (QDs) and organic rylene dyes have been prepared and characterized. Complex formation is mediated by bidentate carboxylate moieties covalently linked to the dye molecules. The complexes were very stable with respect to time (at least months), dilution…
A simple and low-cost method to create metal-metal hybrid nanostructures possessing fairly regularly spaced "hot-spots" of surface plasmon resonances is proposed. The nanohybrid structure was prepared via self-assembly during a simple drop-casting procedure, using chemically synthesized silver nanowires and silver nan…
We present full ab initio calculations of the phonon band structure of thin Si nanowires oriented along the [110] direction. Using these phonon dispersion relations, we investigate the structural stability of these wires. We found that all studied wires were stable also when doped with either B or P, if the unit cell…
Abstract Gelatin nanofibers were prepared via electrospinning using aqueous solutions of formic acid and ethanol as the solvent instead of cytotoxic solvents. The resulting mat was further crosslinked with glutaraldehyde (GTA). The influence of the storing time on the viscosity and gel point of the solution was invest…
A series of functional iodoacetylenes was prepared and converted into the corresponding diacetylene-substituted amino acids and peptides via Pd/Cu-promoted sp-sp carbon cross-coupling reactions. The unsymmetrically substituted diacetylenes can be incorporated into oligopeptides without a change in the oligopeptide str…
Abstract The objective of this work was to characterize the moisture sorption and water vapor permeation behavior of edible films made from sodium caseinate and chitosan for future applications as protective layers on foods. Glycerol was used as a plasticizer, and the films were obtained by a casting/solvent‐evaporati…
A series of ligands LPh, Lnaph and Lanth, which contain two bidentate pyrazolyl–pyridine termini separated by an aromatic (1,2-phenyl, 2,3-naphthyl or 2,3-anthracenyl, respectively) spacer have been used to prepare tetrahedral cage complexes of the form [M4L6]Xn, in which a bis-bidentate bridging ligand spans each of…
Au/TiO2catalysts form hydroperoxy species from H2O–O2 mixtures at near-ambient temperatures; these species can be used in the selective epoxidation of propene to propylene oxide.
Intramolecular energy-transfer results in sensitized ring closing of a pendant dithienylethene from a platinum terpyridyl complex only when the two components are connected with a short pi-conjugated linker.
In this paper, we demonstrated the encapsulation of CdTe quantum dots (QDs) and ZnO nanorods (NRs) with a layer of mesoporous SiO 2 shell (pore size: 4.1 nm) for the purpose of integrating dual-emission property into one common nanostructure. Within the core−shell CdTe/ZnO@SiO 2 nanocomposites, CdTe QDs and ZnO NRs pr…