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。
Abstract Polypropylene (PP)/nylon 6/clay composites were prepared by compounding of PP, which had previously been treated with two kinds of silane compounds, with a master batch composed of 90 wt % of nylon 6 and 10 wt % of octadecyl amine‐modified sodium montmorillonite (NM10). The morphology of the composites was in…
Abstract Chitins produced via a conventional chemical route as well as from a new biological process were modified to increase the efficiency of enzymatic deacetylation reactions for the production of novel biological chitosan. These modified chitins were reacted for 24 h with extracellular fungal enzymes from Colleto…
Imitating nature: Different morphologies of linear polyethyleneimine (LPEI) aggregates regulated by monovalent, divalent, and trivalent metal cations act as biomimetic organic reactors for directing the formation of complicated silica structures. LPEI associated with Cu2+ resulted in turbinelike silica; when associate…
Umkehr! Kolumnare mesomorphe Anordnungen von propellerförmigen, wasserstoffverbrückten Komplexen wirken bei Bestrahlung mit zirkular polarisiertem Licht (CPL) einer bestimmten Händigkeit als supramolekulare Schalter (siehe Bild), die bei Bestrahlung mit entgegengesetzt polarisiertem Licht eine Helixinversion eingehen.
PbO-Sb2O3-B2O3 glasses containing different concentrations of MoO3 ranging from 0 to 5 mol % were prepared. A number of studies have been carried out on these glasses comprising differential thermal analysis, infrared and optical absorption, Raman and ESR spectra, magnetic susceptibility and measurements of dielectric…
A combined theoretical and experimental investigation of conjugated rod-coil block copolymer brushes is reported. The theoretical study for the surface structures of rod-coil block copolymer brushes was established based on the simulation method of dissipative particle dynamics. The effects of solvent stimuli, graftin…
The packing structure of bundled MoSI nanowires is investigated. Scanning and high-resolution transmission electron microscopy are used to determine both the nanowire structure and bundle superstructure. Shown is a high-resolution microscopy image of a small bundle. The image width is 8 nm. It is found that the nanowi…
This paper introduces the synthesis, characterization, surface properties, and reactions of maleic acid monoester end group functionalized polymers. Acylation using maleic acid anhydride of hydroxyl end groups present in either poly(ethylene glycol) (PEG) or poly(trimethylene carbonate) (PTMC) afforded the correspondi…
Transparent and conducting zirconium-doped zinc oxide films with high transparency and relatively low resistivity have been successfully prepared by radio frequency (RF) magnetron sputtering at room temperature. The RF power is varied from 75 to 150 W. At first the crystallinity and conductivity of the film are improv…
Sonolysis of argon-saturated aqueous solutions of the nonvolatile surfactants sodium dodecyl sulfate (SDS) and sodium 1-pentanesulfonate (SPSo) was investigated at three ultrasonic frequencies under both continuous wave (CW) and pulsed ultrasound. Secondary carbon-centered radicals were detected by spin trapping using…
A method is reported for the fabrication of vertically aligned carbon nanotube emitter arrays by microwave plasma chemical vapour deposition. The technique uses a catalyst structure in which Fe, Ni and Al, respectively, acted as the catalyst for carbon nanotube growth, a buffer layer and an isolated layer between the…
In order to utilize renewable resource raw materials as well as trying to recycle polymeric materials, three new polyols (PEEA1-3) were prepared. Bottle grade recycled poly(ethylene terphthalate) was subjected to transesterification and an amidation reaction with different molecular weights of poly(ethylene glycol) an…
Gut behütet! Eine neue Klasse konkaver Tetrathiafulvalen(TTF)-Derivate mit ausgedehntem π-System – Truxen-TTFs – wurde synthetisiert und charakterisiert, und ihre Selbstorganisation mit Fullerenen wurde untersucht (siehe Bild). Truxen-TTFs sind die ersten von TTF abgeleiteten Elektronendonoren, die in Lösung, ohne che…
Saccharomyces cerevisiae and some related yeasts are unusual in that two of the enzyme activities (galactose mutarotase and UDP-galactose 4-epimerase) required for the Leloir pathway of d-galactose catabolism are contained within a single protein-Gal10p. The recently solved structure of the protein shows that the two…
Abstract Structural and magnetic properties of Mgx Zn1−x Fe2O4 powders have been studied with respect to the application for thermal cancer therapy (magnetic hyperthermia). Mgx Zn1−x Fe2O4 (x=0.1–0.5) powders with particle sizes between 5 and 8 nm were produced by citrate method. The X-ray diffraction patterns of the…
X-ray photon-correlation spectroscopy is used to measure the dynamic structure factor $f(q,\ensuremath{\tau})$ of gold particles moving on the surface of thin polymer films. Above the glass transition of the polymer the peculiar form $f(q,\ensuremath{\tau})\ensuremath{\sim}\mathrm{exp}[\ensuremath{-}(\ensuremath{\Gam…
A facile method to template mixed polymer-brush gradients onto a Au surface using a “grafting-from” atom-transfer radical polymerization coupled with an in-plane electrochemical-potential gradient is developed and studied (see figure), PNIPAAm: poly(N-isopropylacrylamide); PHEMA: poly(2-hydroxyethyl methacrylate). Pol…
A water-soluble biotinylated poly( p -phenyleneethynylene) (PPE, 3 ) was synthesized by postfunctionalization of an amine−PPE precursor 2a and investigated for sensory responses in aqueous buffer at physiological pH. Polymer 3 shows similar sensitivity ( K SV = 1.1 × 10 4 M -1 ) to Hg 2+ ions when compared to PPE 1 (…
A series of diamine monomers, i.e., 2,2‘-bis{4-[3,4,5-tris( n -alkan-1-yloxy)benzoate]}-4,4‘-biphenyldiamines containing multiple alkyl side chains, were synthesized in which the length of the alkyl side chains was varied from 5 to 18 carbon atoms. Polyimides were prepared from the diamines and pyromellitic dianhydrid…
Abstract We report here a new approach for the modification of the performance of metal catalysts: organic doping of the metal. Specifically, we report that the doping of Ag with Congo Red (CR@Ag) significantly improves the performance of Ag as a catalyst for methanol oxidation to formaldehyde, outperforming both pure…