Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Oxygen permeation through a mixed conducting membrane is essentially controlled by both the bulk diffusion and the surface reactions on the both sides of the membrane; therefore, it is important to know the proportion of surface reactions in the overall oxygen permeation to improve the oxygen permeability of membranes…
Unter Kontrolle: Die Sekundärstruktur-abhängige Selbstorganisation von β-Peptiden in Lösung beweist, dass natürliche Biopolymere in ihrem Konformationsverhalten nicht einzigartig sind. Stereochemisch kontrollierte Sekundärstruktureinheiten von β-Peptidsträngen und -helices bilden Sandwich-Anordnungen aus plissierten S…
Langzeitgedächtnisstütze: Ein helicales Poly(phenylacetylen) mit positiv geladenen Seitengruppen diente in saurer wässriger Lösung als Templat für supramolekulare Helices aus achiralen Porphyrinen mit entgegengesetzter Ladung. Die supramolekularen Porphyrinaggregate behalten ihre Chiralität bei, selbst wenn das helica…
We report a novel synthetic way to deposit a thin nanoporous silica layer on a variety of solids surfaces from flat substrates to micrometer size powders and, as to the materials, from oxides and hydroxides to organic polymers.
We have measured the heat capacity of zinc oxide for several single crystals with different isotopic compositions in the $5--350\phantom{\rule{0.3em}{0ex}}\mathrm{K}$ temperature range. We have performed first-principles calculations in order to analyze the dependence of the heat capacity on the isotope mass of the ox…
Abstract The reaction of Ln(NO 3 ) 3 ·aq with K 3 [Fe(CN) 6 ] or K 3 [Co(CN) 6 ] and 2,2′:6′,2″‐terpyridine in water/methanol solution led to three one‐dimensional complexes: trans ‐[Ln(H 2 O) 4 (terpy)(μ‐CN) 2 M(CN) 4 ] n (Ln = La 3+ or Sm 3+ ; M = Fe 3+ or Co 3+ ). The structures of [SmFe] n ( 1 ), [SmCo] n ( 2 ) an…
A de novo, genetically engineered 687 residue polypeptide expressed in E. coli has been found to form highly rectilinear, beta-sheet containing fibrillar structures. Tapping-mode atomic force microscopy, deep-UV Raman spectroscopy, and transmission electron microscopy definitively established the tendency of the fibri…
Abstract In this work, the characteristics of polypyrrole (PPy) films electrodeposited onto an electrochemically roughened gold substrate with bimetallic silver and gold nanoparticles were first investigated. First, a silver substrate was roughened by a triangular‐wave oxidation–reduction cycle (ORC) in an aqueous sol…
In the spreading of a water droplet on an aligned silicon nanorod array surface, a precursor rim was detected moving ahead of the contact line. In this process, nanorods were bundled by the capillary force to form clusters, and a watermark developed on the surface after water evaporated. The size of the watermark, R(p…
Two soluble heavy-metal phthalocyanine derivatives, namely, tetra-alpha-(2-ethylbutoxy) chloroindium phthalocyanine (alpha-InPcCl) and tetra-beta-(2-ethylbutoxy) chloroindium phthalocyanine (beta-InPcCl), were synthesized. Their optical-limiting properties in THF solution were investigated with a 532 nm nanosecond las…
We have newly fabricated a long one-dimensional (1D) mesoporous carbon nanofiber by using a mesoporous silica nanofiber template. The resulting mesoporous carbon nanofiber shows the unique mesoporous structure of circularly wound nanochannel alignment perpendicular to the long fiber axis and the high gas sorption prop…
To establish its significance during commercial breadmaking, dityrosine formation was quantified in flours and doughs of six commercial wheat types at various stages of the Chorleywood Bread Process. Dityrosine was formed mainly during mixing and baking, at the levels of nmol/g dry weight. Good breadmaking flours tend…
The syntheses and characterization of two new tetrathiafulvalene (TTF) derivatives bearing pyridine-based substituents and 1,5'-dimethyl-6-oxoverdazyl radicals are described. The TTF-pyridine and bipyridine aldehydes were prepared via a palladium-catalyzed cross-coupling reaction between mono(tributylstannyl)tetrathia…
Abstract Lamellar reflections in small‐angle X‐ray and neutron scattering patterns of uniaxially drawn semicrystalline polymers appear to fall on elliptical or hyperbolic arcs. We attribute this to a 3D lattice of tilted lamellae, a macrolattice. Affine deformation of this lattice, such as during uniaxial draw, moves…
Abstract A novel fluorinated aromatic diamine, 1,1‐bis(4‐amino‐3,5‐dimethylphenyl)‐1‐(3,5‐ditrifluoromethylphenyl)‐2,2,2‐trifluoroethane (9FMA), was synthesized by the coupling reaction of 3′,5′‐ditrifluoromethyl‐2,2,2‐trifluoroacetophenone with 2,6‐dimethylaniline under the catalysis of 2,6‐dimethylaniline hydrochlor…
We report the use of the block copolymer micelle approach to produce various transition metal nanoparticles such as iron, cobalt, and nickel with precisely controlled size and spacing. These uniformly sized catalyst nanoparticles derived from the block copolymer micelle approach have enabled the synthesis of carbon na…
The solubility of erythromycin A dihydrate in pure ethanol, propan-2-ol, methanol, acetone, chloroform, and acetone + water was measured by a synthetic method at temperature ranging from 293.20 K to 323.00 K at atmosphere pressure. The laser monitoring observation technique was used to determine the disappearance of t…
Abstract Methacrylic acid (MAA) was used as in situ surface modifier to improve the interface interaction between nano‐CaCO 3 particle and ethylene–propylene–diene monomer (EPDM) matrix, and hence the mechanical properties of nano‐CaCO 3 ‐filled EPDM vulcanizates. The results showed that the incorporation of MAA impro…
A series of γ-brass related structures in the Zn-rich portion of the Zn−Pd phase diagram (ca. 80 at % Zn) is investigated using single-crystal diffraction and tight-binding electronic-structure calculations. Earlier research identified regular arrays of inversion antiphase domains (IAPDs) over a narrow composition ran…
Compound [Y(Hdo3aP(ABn))(H2O)][Y(Hdo3aP(ABn))].6H2O.iPrOH, where H4do3aP(ABn) is 1,4,7,10-tetraazacyclododecane-1,4,7-triacetic-10-methyl(4-aminobenzylphosphinic) acid, a monophosphinate analogue of H4dota, was prepared in the solid state and studied using X-ray crystallography. In contrast to all single-crystal struc…