Materials Literature
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Using laser molecular beam epitaxy technique, BaTiO 3 ultrathin films of 7, 12, 25, 750 monolayer (ML) thicknesses were obtained on MgO substrates. The effect of reducing the thickness of a BaTiO 3 film on its structural and optical properties was investigated by Raman scattering measurement, X-ray diffraction techniq…
Abstract To explore the possibility of making poly( p ‐phenylene sulfide) (PPS) nanocomposites via melt intercalation and improving the mechanical properties of PPS, in this study we first modified clay (montmorillonite) with alkylammonium salt by cation exchange and then mixed the modified clay together with the PPS…
A new series of hyperbranched polymer electrolytes for use as membranes for lithium batteries are described. Electrolytes were made by polymerization between cyanuric chloride and diamino-terminated poly(ethylene oxide)s, followed by cross-linking via a sol−gel process. The cross-linking improves the mechanical integr…
Abstract Electron‐beam irradiation of injection‐molded specimens of polyiminohexamethyleneiminoadipoyl (better known as polyamide‐6,6) was carried out in air at ambient temperature (303 K) and a high temperature (393 K). Most of the irradiated specimens were tensile dumbbells, although a few were cylinders for compres…
Polyoxometallates (POMs), i.e. metal oxide clusters of mainly tungsten, are effective homogeneous photocatalysts for the mineralization of organic pollutants. ·OH radicals formed by the reaction of the photo-excited POMs with H2O appear to play a key role in the process. POMs are similar to TiO2. In this article, the…
Incorporating nanoclusters of nickel hexacyanoferrates (NiHCF) onto a porous polyaniline (PANI)–carbon nanotube (CNT) matrix provides a novel class of hybrid materials with a good ion exchange capacity, high stability, and selectivity for caesium ions. The CNT–PANI–NiHCF nanocomposite films have been synthesized by st…
Abstract The bulk ring‐opening copolymerization of glycolide with trimethylene carbonate was performed under different conditions. The influence of the composition, temperature, reaction time, and catalyst on the chain microstructure was studied by means of 1 H and 13 C NMR spectroscopy. The final microstructure was f…
Abstract A series of plastic materials from recycled polyethylene (PE) and oyster‐shell powder were prepared to test their fire‐retardant properties with an aim of finding a practical way of waste recycling. Oyster‐shell powder was found to be mainly composed of calcium carbonate and it decomposed to calcium oxide and…
Abstract The permeability of carbon dioxide, oxygen, nitrogen, and air through commercial monolayer and multilayer films, based on polyethylene (PE), biaxially oriented polypropylene (BOPP), and polyamide (PA), used for food packaging is reported. The influence of temperature (from 10 to 60°C) on permeability and DSC…
Abstract Many studies have been carried out to make bottle‐to‐bottle recycling feasible. One of the difficulties found is the decrease in the polymer's molar mass, which damages the injection blow molding process. A method usually employed to increase the molar mass of virgin PET consists of solid‐state polymerization…
The interplay between the solid-state spin-crossover features and the structural properties is analyzed for the $[{\mathrm{Mn}}^{III}{(\mathrm{pyrol})}_{3}\mathrm{tren}]$ complex on the basis of high-pressure and low-temperature single-crystal x-ray-diffraction experiments. In particular, the low-temperature ($30\phan…
In this study, the effect of microstructure on the tensile and fracture properties of injection molded biocomposites consisting of starch-based matrix and short sisal fibers has been investigated. Tensile tests are carried out on samples cut in longitudinal (L) and transverse (T) directions with respect to the melt fl…
We present first-principles total-energy calculations of water adsorption on the $\mathrm{Zn}\mathrm{O}(10\overline{1}0)$ surface. We find that on ideal $\mathrm{Zn}\mathrm{O}(10\overline{1}0)$ surfaces, the fully molecular chemisorption is most energetically favorable at coverage $\ensuremath{\leqslant}0.5\phantom{\r…
Let's twist again: Bei der Transkription der molekularen Chiralität gängiger stereogener Zentren in amplifizierte supramolekulare Chiralität durch invertierte Helicität während des Zusammenlagerns Gel-bildender π-konjugierter Moleküle entstehen longitudinal kondensierte M- und P-Helices. Dieser „Feldwebel-und-Soldaten…
The reaction of the bismuth silanolates [Bi(OSiR2R')3] (R = R' = Me, Et, iPr; R = Me, R' = tBu) with water has been studied. Partial hydrolysis gave polynuclear bismuth-oxo clusters whereas amorphous bismuth-oxo(hydroxy) silanolates were obtained when an excess of water was used in the hydrolysis reaction. The metathe…
This paper reports a detailed and systematic lattice dynamical calculation of the newly discovered intermetallic superconductor $\mathrm{Mg}\mathrm{C}{\mathrm{Ni}}_{3}$ by using a lattice dynamical model theory based on pairwise interactions under the framework of the rigid ion model. The results bring out the anomalo…
Cobalt-containing mesoporous TUD-1 with different Si/Co ratios (100, 50, 20, and 10) was synthesized by the direct hydrothermal treatment method (DHT) using triethanolamine (TEA) as a template. The prepared samples (denoted as Co-TUD-1) were characterized by XRD, UV/Vis spectroscopy, elemental analysis, N2 sorption me…
We show detailed magnetic absorption spectroscopy results of an in situ cleaved high-quality single crystal of magnetite. In addition the experimental setup was carefully optimized to reduce drift, self-absorption, and offset phenomena as far as possible. In strong contradiction to recently published data, our observe…
We measured the ultrafast response of triangular silver nanoparticles upon femtosecond excitation of their plasmon resonance. After a fast electron relaxation, the signature of a bimodal mechanical vibration of the particle is apparent as a spectral modulation. We identify the two lowest frequency, totally symmetric v…
Femtosecond visible photoluminescence is detected from gold nanoparticles using time-resolved fluorescence upconversion spectroscopy. We directly compared this fast luminescence from gold nanospheres $(\ensuremath{\emptyset}25\phantom{\rule{0.3em}{0ex}}\mathrm{nm})$ with that obtained from nanorods ($\ensuremath{\empt…