Materials Literature
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Blumen für edle Vase gesucht: Die Schale des Edelmetallats [PdII7VV6O24(OH)2]6−, das aus sieben quadratisch-planaren PdIIO4-, vier tetraedrischen VVO4- und zwei quadratisch-pyramidalen VVO5-Addend-Einheiten besteht, bietet keinen Platz für Gäste. Seine Lösungsstabilität wurde mithilfe der 51V-NMR-Spektroskopie und der…
Abstract The influence of formation temperature on the ultradrawing properties of ultrahigh‐molecular‐weight polyethylene/carbon nanotube (UHMWPE/CNT) fiber specimens is investigated. Gel solutions of UHMWPE/CNT with various CNT contents were gel‐spun at the optimum concentration and temperature but were cooled at var…
A method is presented for preparing core-shell silica-polypeptide composite particles with variable and controllable shell growth. The procedure is demonstrated using poly(carbobenzoxy-L-lysine) and poly(benzyl-L-glutamate); after deprotection, these can lead to the most common basic and acidic homopolypeptides, poly(…
Abstract We have demonstrated directed self‐assembly of poly(styrene‐ b ‐dimethylsiloxiane) (PS‐ b ‐PDMS) down to sub‐10‐nm half‐pitch by using grating Si substrate coated with PDMS. The strong segregation between PS and PDMS enables us to direct the self‐assembly in wide grooves of the grating substrate up to 500 nm…
We show how the composition and the morphology of composite films deposited by one step chemical bath deposition (CBD) can be controlled by varying kinetic factors, in particular by selective nucleation, as well as varying the rate of growth of specific phases. ZnS/CdS composite films are obtained from a solution cont…
A novel one-step solvothermal synthesis of stable colloidal EuS nanocrystals (NCs) is reported. The EuS NCs were synthesized in oleylamine directly from europium oleate and diethylammonium diethyldithiocarbamate in the presence of dodecanethiol and phenanthroline. The formation of single crystalline monodisperse EuS N…
Given that half-metals are promising futuristic materials for spintronics, organic materials showing half-metal character are highly desirable for spintronic devices, not only owing to their weak spin-orbit and hyperfine interactions, but also their light and flexible properties. We predict that a two-dimensional orga…
We report direct evidence of interfacial states at the onset of $\text{O}\text{ }K$ edge confined to a spatial distance of 1 unit-cell full-width at half maximum at the sharp interfaces between epitaxial films of ${\text{LaMnO}}_{3}$ and ${\text{SrMnO}}_{3}$ from electron energy-loss spectroscopy (EELS) measurements.…
An IR absorption study is presented of a hydrogen defect in ZnO that gives rise to a local vibrational mode at $3326\text{ }{\text{cm}}^{\ensuremath{-}1}$ [M. D. McCluskey et al., Appl. Phys. Lett. 81, 3807 (2002)]. It is shown that a subband gap illumination results in the appearance of a new IR absorption line at $3…
Star polymers bearing vinyl-functionalized hyperbranched cores were successfully prepared at moderate-to-high monomer conversions ( ca . 80%) via a modified “arm-first” strategy. This was achieved by reversible addition−fragmentation chain transfer polymerization of a methacrylate type asymmetrical divinyl monomer wit…
Our experiments on ferroelectric aging of Al3+- and Ga3+-doped BaTiO3 ceramics reveal the crucial role of migration kinetics of point defects (oxygen vacancies) besides the thermodynamic driving force based on the symmetry conforming short-range ordering scenario. The doping with Ga3+ or tiny Al3+ ions shows the clear…
Nanoductility induced crack nucleation mechanism mediated by a single dislocation core is revealed in a 300 million-atom molecular dynamics simulation of shocked silicon carbide ceramic. The atomistic damage mechanism involves dynamic transitions between clearly delineated regimes—from shock-induced structural transfo…
Dissolution of [(CH(3))N](2)Na[MnN(CN)(5)]·H(2)O in water results in the rapid dissociation of the trans-CN(-) ligand to form trans-[MnN(H(2)O)(CN)(4)](2-)(aq), which reacts with monodentate pyridine ligands such as 3-methyl and 4-methyl pyridine to form the corresponding mono-substituted complexes, of which the molec…
At the core: A novel core-modified subphthalocyanine analogue has been synthesized (see structure; Cl green, red O, blue N). This molecule comprises a six-membered ring unit in place of a five-membered ring unit and exhibits unique spectroscopic (see plot) and electrochemical properties originating from the azaphenale…
β-Barrel proteins that take the shape of a ring are common in many types of water-soluble enzymes and water-insoluble transmembrane pore-forming proteins. Since β-barrel proteins perform diverse functions in the cell, it would be a great step towards developing artificial proteins if we can control the polarity of art…
Nanotubes created from a three monolayer thick anatase(001) layer were investigated by DFT calculations in the 33−66 Å diameter range. Strain energies were found to be negative in the whole diameter range, indicating the stability of the nanotubes relative to the flat layer, providing a possible explanation for the ro…
We have designed and synthesized a series of modular, dual-color dyes comprising a conventional boron dipyrromethene (Bodipy) dye, as a yellow emitter, and a Bodipy dye possessing extended conjugation that functions as a red emitter. A flexible tether of variable length, built from ethylene glycol residues, connects t…
Epitaxial strain can induce the formation of morphotropic phase boundary in lead free ferroelectrics like bismuth ferrite, thereby enabling the coexistence of tetragonal and rhombohedral phases in the same film. The relative ratio of these phases is governed by the film thickness and theoretical studies suggest that t…
Transport and magnetic properties of Co-doped BaFe2As2 epitaxial thin films grown on MgO substrate, Mohan, Shyam, Taen, Toshihiro, Yagyuda, Hidenori, Nakajima, Yasuyuki, Tamegai, Tsuyoshi, Katase, Takayoshi, Hiramatsu, Hidenori, Hosono, Hideo
Poplar seed hair fibers, harvested from the seed pods of one of the most common trees grown in the United States, have properties that make them ideal fibers for thermal insulation applications. This preliminary study examines some physical, chemical, and thermal characteristics of poplar fiber in relation to wool, do…