Materials Literature
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Metallaustausch: Das Alkali-Schichtsilicat Magadiit vermag durch Ionenaustausch Zn2+ aus Meerwasser selbst in Gegenwart von Cd2+ anzureichern. Zwischen den Schichten eingelagertes Na+ wird in Elektrolytmischungen fast quantitativ gegen Zn2+ ausgetauscht (siehe Bild).
We report on plasmon induced optical switching of electrical conductivity in two-dimensional (2D) arrays of silver (Ag) nanoparticles encapsulated inside nanochannels of porous anodic aluminum oxide (AAO) films. The reversible switching of photoconductivity greatly enhanced by an array of closely spaced Ag nanoparticl…
We have used in situ X-ray diffraction and line profile analysis to study the carburization of a 6 nm Pd catalyst supported on carbon at various temperatures under helium, hydrogen, and oxygen. A maximum of 10% C atoms was dissolved in the Pd lattice. This phase is stable at ambient conditions but decays above 400 °C.…
Ca–Si–Al–O–N–F glass formation regions have been mapped on 6Ca 2+ –3Si 4+ –4Al 3+ ternary diagrams at fixed O:N:F of 79:20:1 and 75:20:5 (in eq%). For both fluorine contents, glass formation regions extend toward more Ca‐rich compositions at 1650°C compared with the Ca–Si–Al–O–N system at 1700°C. Ca–Si–Al–O–N–F meltin…
We report the self-assembly of a single species or a binary mixture of microparticles in ionic liquid-in-water Pickering emulsions, with emphases on the interfacial self-assembled particle structure and the partitioning preference of free particles in the dispersed and continuous phases. The particles form monolayers…
Abstract Poly(2‐oxazoline)s are an interesting class of synthetic poly(amide)s that can be prepared by living cationic ring‐opening polymerization. The properties of poly(2‐oxazoline)s can be tuned by variation of the 2‐substituent of the 2‐oxazoline monomer. In this contribution the utilization of fatty acids as side…
Ni – Cu – Zn ferrite materials have been extensively used in multilayer chip inductors because of their remarkable properties at higher frequencies. In the present work, single phase Ni 0.35 Cu 0.05 Zn 0.60 Fe 1.98 O 4-δ ferrite, has been prepared by microwave sintered (MS) method. In comparison with the conventional…
Porous monolithic inorganic/polymeric hybrid materials have been prepared via ring-opening metathesis copolymerization starting from a highly polar monomer, i.e., cis-5-cyclooctene-trans-1,2-diol and a 7-oxanorborn-2-ene-derived cross-linker in the presence of porogenic solvents and two types of inorganic nanoparticle…
Abstract One of the most important factors influencing silicon solar cells performances is the front side reflectivity. Consequently, new methods for efficient reduction of this reflectivity are searched. This has always been done by creating a rough surface that enables incident light of being absorbed within the sol…
Organic nonlinear electrooptical (ONLO) chromophores must be acentrically ordered for the ONLO material to have electrooptic (EO) activity. The magnitude of the order is characterized by the acentric order parameter, <cos(3) β>, where β is the major Euler angle between the main axis of the chromophore and the poling f…
Abstract Laboratory‐scale synthesis and morphological and surface energy characterization of triblock A–B–A copolymers based on poly(lactic acid) (PLA; A segment) containing various block lengths of perfluoropolyether (PFPE; B segment) at 5 wt% PFPE content are reported. Incorporation of PFPE segments in PLA lowers si…
A series of polystyrene (PS)/organomontmorillonite (OMMT) clay nanocomposites was prepared by effectively dispersing the inorganic nanolayers of OMMT clay in the organic PS matrix via the solvent blending method using xylene as a solvent. The resulting samples were characterized using X-ray diffraction (XRD), scanning…
Terpolymer ligand was synthesized from 8-hydroxyquinoline and anthranilic acid with formaldehyde (QAF) by solution condensation in an acid medium. Polychelates of Cu(II), Ni(II), Zn(II), and Pb(II) were prepared using the terpolymer as ligand. The ligand and chelates were characterized by elemental analysis, TGA, DSC,…
Neue Anknüpfungspunkte: Unter hydrothermalen Bedingungen geknüpfte kovalente Sb-N-Bindungen ermöglichen die Anbindung primärer und sekundärer organischer Amine (C grau, N blau) an existierende Antimonato-Polyoxovanadat-Clusteranionen (in Polyederdarstellung; O rot, Sb gelb), deren Ladung durch protonierte Amine kompen…
This paper presents a new type of flame-retardant ultraviolet (UV)-cured epoxy acrylate (EA) that contains microencapsulated phase-change materials (Micro-PCM); the Micro-PCM, which is based on a paraffin core and a melamine−formaldehyde (MF) shell, was synthesized via an in situ polymerization method. To improve the…
Nanosized titanium dioxide (TiO 2 ) powders (∼40 nm) were used for preparation of tape‐casting slurries. Effect of various solvents and dispersants on the dispersability of TiO 2 slurries was studied by sedimentation tests and rheology measurements. TiO 2 green tapes were prepared by tape‐casting method and densified…
Abstract Stimuli‐responsive hyperbranched polymers have attracted great attention in recent years because of their wide applications in biomedicine. Through proton‐transfer polymerization of triethanolamine and 1,2,7,8‐diepoxyoctane with the help of potassium hydride, a series of novel backbone thermo and pH dual‐resp…
Mesoporous carbon catalyst supports are attractive due to their wide chemical stability while potentially increasing mass-transport through and providing a path for larger molecules to access catalytic sites. Herein we report the synthesis of a phosphorylated mesoporous carbon solid-acid catalyst characterized by NH(3…
A systematic investigation on the effective ionic conductivity of a novel intermediate-temperature mixed oxide-ion and carbonate-ion conductor (MOCC) consisting of a ceria phase and a carbonate phase is reported. The study explicitly shows that the observed remarkable temperature-dependent is primarily the result of s…
A novel initiator for atom transfer radical polymerization, also allowing for selective cleavage of polymer grafts, was designed and immobilized on a solid substrate. After cleavage, the initiator content was determined by utilizing Ellman's reagent and the cleaved polymer grafts were isolated and characterized by siz…