Materials Literature
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Polylactide or poly(l-lactic acid) (PLA) is a commercially promising material for use as a renewable and biodegradable plastic. Three novel PLA-degrading enzymes, named PLAase I, II and III, were purified to homogeneity from the culture supernatant of an effective PLA-degrading bacterium, Amycolatopsis orientalis ssp.…
We have developed a procedure for crystal structure generation and prediction for ionic compounds consisting of a collection of cations and rigid complex anions. Our approach is based on global optimization of an energy functional consisting of the electrostatic and soft-sphere repulsive energies using Metropolis Mont…
A facile, environmentally benign shape-controlled synthesis of anisotropic crystalline gold nanostructures at room temperature has been developed using aspartic acid (Asp) as the reducing, particle-stabilizing, and shape-directing agents. Great latitude in the control of particle size and shape, including formation of…
A series of cubic CoO nanocrystals with various morphologies and sizes were obtained via the decomposition of cobalt(II) oleate complex at 280−320 °C in noncoordinating solvent octadecene containing dodecanol/oleic acid. The morphology of CoO nanocrystals could be conveniently tuned by manipulating the decomposition r…
Nanoporous membranes are made based on photoreactive hydrogen-bridged smectic liquid crystal dimers. The self-assembled layered structure is locked by photopolymerization. The hydrogen bridges are reversibly opened by heating or by changing the pH. This forms periodic pores of which the integrity is conserved by a cov…
Open-pore biodegradable foams with controlled porous architectures were prepared by combining gas foaming and microparticulate templating. Microparticulate composites of poly(epsilon-caprolactone) (PCL) and micrometric sodium chloride particles (NaCl), in concentrations ranging from 70/30 to 20/80 wt.-% of PCL/NaCl we…
Abstract New talc/PBAT hybrid materials were prepared through reactive extrusion. First, PBAT was free‐radically grafted with MA to improve the interfacial adhesion between PBAT and talc. Then, the resulting MA‐ g ‐PBAT was reactively melt‐blended with talc through esterification reactions of MA moieties with the sila…
The photoluminescence response of a novel, random 9,9-dialkylfluorene/dibenzoborole copolymer toward a series of nine inorganic anions was studied both in solution and in thin films. Photoluminescence quenching with sensitivity in the micromolar range was observed for fluoride, cyanide, and iodide. Hereby, the interac…
meso-Diphenylphosphanylporphyrins were successfully prepared via Pd-catalyzed C-P cross-coupling reaction of the corresponding meso-iodoporphyrins with diphenylphosphane. The meso- phosphanylporphyrins underwent regioselective metalation at the beta carbon to produce novel classes of porphyrin dimers linked by periphe…
Trap states are known to influence the excited-state dynamics in nanocrystalline semiconductors, but the nature and magnitude of the exciton−trap interaction is poorly understood owing to the relative optical inactivity of carrier traps and the heterogeneity of trap-state distributions. Nanocrystal time-resolved fluor…
We report on the hydrothermal synthesis of the [Eu(DPA)(HDPA)(H(2)O)(2)].4H(2)O lanthanide-organic framework (where H2DPA stands for pyridine-2,6-dicarboxylic acid), its full structural characterization including single-crystal X-ray diffraction and vibrational spectroscopy studies, plus detailed investigations on the…
In a pure liquid, the behaviour of a gas or vapour microbubble is determined primarily by its size, the ambient pressure and the properties of the surrounding liquid. In practice, however, adsorption of a dissolved substance from the surrounding liquid onto the microbubble surface will often take place, producing a th…
Abstract Magnetic shape memory alloys (MSMAs) are the smart materials which can undergo a reversible structural phase transition when a magnetic field is applied. The experimentally most studied MSMA, Ni 2 MnGa, undergoes a martensitic phase transition from a high temperature cubic phase to a low temperature tetragona…
A new hybrid methodology that fully integrates the processing capabilities of the twin screw extrusion process (conveying solids, melting, dispersive and distributive mixing, pressurization, temperature profiling, devolatilization) with electrospinning is described. The hybrid process is especially suited to the dispe…
This paper addresses the linear and second-order nonlinear optical properties of two anil derivatives and in particular their variations upon switching between the enol-imine and keto-amine forms. Quantum chemical evaluations of the first hyperpolarizabilities, accounting for both solvent and electron correlation effe…
The observation of twinned structures in one-dimensional nanomaterials is very rare. In this paper, we focused our attention on the synthesis of CuS twinned nanorods by a simple wet chemical method, the in situ source−template−interface reaction (ISTIR) route, at low reaction temperature (105 °C). The possible mechani…
Precursor-reduction method is employed to synthesize nanometer-sized ZnTe. Zinc blende ZnTe nanocrystals growth in three different shapes under various conditions, that is, quasi-spheres, tetrahedrons, and nanorods, have been observed. It is believed that the crystal growth of ZnTe is the rate-controlling step when su…
The high pressure behavior of bundled $1.35\ifmmode\pm\else\textpm\fi{}0.1\phantom{\rule{0.3em}{0ex}}\mathrm{nm}$ diameter single wall carbon nanotubes (SWNT) filled with ${\mathrm{C}}_{70}$ fullerenes (usually called peapods) has been investigated by Raman spectroscopy and compared with the corresponding behavior of…
High Resolution Image Download MS PowerPoint Slide First-principles calculations have been used to systematically screen >16 million mixtures of metal hydrides and related compounds to find materials with high capacity and favorable thermodynamics for reversible storage of hydrogen. These calculations are based on a l…
The growth of calcium carbonate (calcite) mesocrystals with self similar unique hierarchical superstructures is successfully realized by polymer-controlled crystallization. A mechanism involving the self-organization of smaller inorganic building blocks during the crystallization of calcium carbonate is proposed.