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。
Mono- and bimetallic colloidal particles have gained increasing attention in science and application throughout the last several years. In this contribution, we present a synopsis of the wet chemical syntheses of these materials and survey potential applications in catalysis and materials science. Methods for the char…
Abstract An Important aspect with respect to optimal mechanical performance of fiber reinforced composites in general and durability in particular is the optimization of the interfacial bond between fiber and polymer matrix. The quality of the fiber‐matrix interface is significant for the application of natural fibers…
A seed-mediated growth approach to improved monodispersity of nanoparticles that involves controlling nucleation and growth in solution is presented. Using this approach, spheroidal and rod-like gold particles (see Figure) could be prepared in the presence of a rod-like micellar template. The aspect ratio of the parti…
UNLABELLED: InterProScan is a tool that scans given protein sequences against the protein signatures of the InterPro member databases, currently--PROSITE, PRINTS, Pfam, ProDom and SMART. The number of signature databases and their associated scanning tools as well as the further refinement procedures make the problem…
In a clonal culture of a freshwater dinoflagellate belonging to the Peridinium umbonatum STEIN species complex, plate pattern variability and plate overlap pattern were investigated and documented by scanning electron microscopy. In addition, various field populations were investigated. All possible plate pattern vari…
Charge-density-wave (CDW) dynamics is studied on a submicron length scale in NbSe(3) and o-TaS(3). Regions of negative absolute resistance are observed in the CDW sliding regime at sufficiently low temperatures. The origin of the negative resistance is attributed to the different forces that the deformed CDW and quasi…
This investigation sought to reveal the dynamic mechanism for self-exchange between an adsorbed homopolymer layer and chains in free solution, employing poly(ethylene oxide) (PEO) adsorbed on silica from aqueous solution as a model system. Fluorescence tracer studies of individual populations within a saturated adsorb…
By reacting phthalic anhydride with excess of diethylene glycol and metal acetate, the metal salts of mono(hydroxyethoxyethyl)phthalate were prepared (metal = Cu2+, Mn2+ and Zn2+). Polyurethanes containing metal ions in the main chain were synthesized by reacting hexamethylene diisocyanate (HMDI) or tolulylene 2,4-dii…
Poly(butylene succinate), (PBS) with different molecular weight was γ-irradiated at different temperatures and various doses. PBS with high molecular weight and smaller peak area of crystal melting gave the highest gel content at the same temperatures and dose. A two-step irradiation (irradiation in molten state after…
The photoluminescence quantum efficiency of the yellow series $1s$ orthoexciton in ${\mathrm{Cu}}_{2}\mathrm{O},$ including its phonon sidebands, was measured in an Ulbricht sphere. The obtained efficiency values between ${10}^{\ensuremath{-}4}$ and ${10}^{\ensuremath{-}6}$ are remarkably low. The nonmonotonous temper…
The effect of dynamic vulcanization and influence of filler loading of white rice husk ash filled elastomer rich ethylenepropylene diene terpolymer and propylene blends were investigated. Blends with filler loading ranging from 0 to 60 php (Parts per hundred of total polymer by weight) were prepared in a Brabender pla…
The crystal structure of a new ternary borate, lead gallium boron tetraoxide, PbGaBO4, has been determined by X-ray diffraction using a single-crystal grown from a PbO flux. The structure consists of infinite [010] chains of edge-sharing GaO6 octahedra bridged by BO3 triangles. The Pb2+ cations and their stereoactive…
A functional cyclic carbonate, 5-methyl-5-benzyloxycarbonyl-1,3-dioxan-2-one (MBC), was utilized in the synthesis of novel poly(ester-carbonates) containing pendent carboxylic acid groups. Copolymers with ε-caprolactone (CL) and L-lactide (LLA) were synthesized by ring-opening polymerization (ROP) using either an Al-a…
We measured the effect of alloy composition on the atomic bonding in bulk ${\mathrm{Ge}}_{1\ensuremath{-}x}{\mathrm{Si}}_{x}$ alloys grown by the Czochralski method across the whole composition range $0<x<1.$ Extended x-ray-absorption fine-structure measurements performed at the Ge K edge at 20 K found that the…
Noninvasive methods to visualize blood flow in the intratumoral vasculature have not previously been studied. In the present study, the use of a novel intravascular MR contrast agent with a generation-6 polyamidoamine dendrimer core (G6-(1B4M-Gd)192; MW: 175kD) was investigated, and the vasculature in experimental tum…
Phosphate films with thicknesses on the order of the original native metal oxide have been formed on oxide-free aluminum and iron surfaces by electrochemical treatment in 5M phosphoric acid. Electrochemistry was performed under inert atmosphere in a previously described anaerobic cell. The metal phosphate films formed…
Electron energy loss spectroscopy is a well adapted tool for the investigation of the valence excitations of individual nanometer-size particles. The interpretation of the loss spectra of such small particles, however, relies in most cases on a quantitative comparison with simulated excitation probabilities. Here we p…
Abstract A general method for the controlled synthesis of polylactide in solution and from solid supports is presented. The evaluation of stannous(II) trifluoromethane sulfonate [Sn(OTf) 2 ] and scandium(III) trifluoromethane sulfonate [Sc(OTf) 3 ] as catalysts for the ring‐opening polymerization (ROP) of L ‐, D ‐, an…
Sol−gel processing of new materials for second-order nonlinear optics promises to be a simple and highly versatile synthetic route among those that have been evaluated to achieve large and stable second-harmonic generation. Introduction to various types of organic chromophore−inorganic matrix hybrid materials that hav…
The behavior as a function of temperature of very thin films (10 to 200 nm) of pentylcyanobiphenyl on silicon substrates is reported. In the vicinity of the nematic-isotropic transition we observe a coexistence of two regions of different thicknesses: thick regions are in the nematic state while thin ones are in the i…