Materials Literature
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Acidithiobacillus ferrooxidans plays an important role in bioleaching in reproducing the mineral oxidant of ferric iron (Fe(3+) ) by oxidization of ferrous iron (Fe(2+) ). The high-molecular-weight c-type cytochrome Cyc2 that is located in the external membrane is postulated as the first electron carrier in the Fe(2+)…
The application of electric bias across tip-surface junctions in scanning probe microscopy can readily induce surface and bulk electrochemical processes that can be further detected though changes in surface topography, Faradaic or conductive currents, or electromechanical strain responses. However, the basic factors…
We report on the design and the experimental evidence of a flat graded index photonic crystal lens. The gradient has been designed so that the flat slab focuses a plane wave and so that it converts the wave issued from a point source into a plane wave. This graded-index photonic crystal lens operates as a convex lens.…
A light Ta3N5: Mesoporous Ta3N5 microspheres were synthesized by thermally nitriding a high-surface-area, microporous, amorphous Ta2O5 precursor at 750 °C, which is lower than the 900 °C needed for the complete nitridation of micrometer-sized Ta2O5 powder. The mesoporous Ta3N5 microspheres show significantly enhanced…
Atomic force microscopy is used to conduct the first detailed nanoscopic study on the crystal growth of a complex mixed metal/metal–organic framework based on the MOF-5 framework topology. Shells of isomorphously substituted Co/Zn-MOF-5 and MOF-5 were epitaxially grown on MOF-5 core crystals at room temperature and lo…
This study presents a method for analysing the eddy current distribution in splints and oil tank and investigates the losses because of eddy currents in a shell‐type power transformer. An optimisation algorithm combining the Taguchi's and the Rosenbrock's method to decrease the eddy current losses is proposed based on…
Sulfate-reducing bacteria are characterized by a high number of hydrogenases, which have been proposed to contribute to the overall energy metabolism of the cell, but exactly in what role is not clear. Desulfovibrio spp. can produce or consume H2 when growing on organic or inorganic substrates in the presence or absen…
We analyze the interaction at the surface of a three-dimensional (3D) topological insulator among 2D electron states belonging to the Dirac cone close to the point of the Brillouin zone and the Rayleigh surface phonon mode. The model deals with an elastic continuum in the long-wavelength limit, in Random Phase Approxi…
To investigate the supramolecular interactions of the mechanically interlocked rotaxane pendants and conjugated polymer backbones, four analogous polymers were systematically synthesized by copolymerization of a 9-alkylidene-9 H -fluorene monomer with various monomers, which contained a diketopyrrolopyrrole unit tethe…
Ein Chelatbildner aus der sauerstofffreien Welt: Verschiedenste Experimente zeigen, dass Closthioamid, das erste Antibiotikum aus einem streng anaeroben Bakterium (Clostridium), ein selektiver Kupfer(I)-Chelatbildner ist. Die Geometrie des Polythioamid-Komplexes, in dem zwei Kupferionen in einer trigonal-planaren Koor…
Eine vielseitige Synthesemethode: Monodisperse Anatasmikrokugeln mit verschiedenen komplexen Morphologien wurden mithilfe eines vielseitigen fluorfreien Solvothermalprozesses in Gegenwart von Ammoniak hergestellt (siehe Bild). Die Keimbildung an der Oberfläche und der nachfolgende Aushöhlungsprozess dienen als eindeut…
A significant episteric ("around a solid") distortion of the hydrogen-bond structure of water is promoted by solutes with nanoscale surface detail and physico-chemical complexity, such as soluble natural proteins. These structural distortions defy analysis because the discrete nature of the solvent at the interface is…
Nanoporous carbon materials, a unique and useful material, have been widely used in many technologies such as separation processes, catalysis, energy storage, gas storage, energy conversion, etc. due to its high specific surface area and tunable porosity. In this research, nanoporous carbons were prepared using simple…
Abstract Researchers have used the Oliver-Pharr method to analyze nanoindentation test results for viscoelastic materials without considering the viscous effect. This study develops procedure to analyze nanoindentation creep results of asphalt binder considering the viscous effect. In particular, models such as Voigt,…
Two novel salicylaldoxime‐functionalized poly(ethylene glycol)‐bridged dicationic ionic liquids ([salox‐PEG1000‐DIL][BF4] and [salox‐PEG1000‐DIL][PF6]) were prepared and characterized. [salox‐PEG1000‐DIL][BF4] was found to be an efficient and recyclable ligand for palladium‐catalyzed Suzuki–Miyaura reaction in water.…
Abstract The nanostructured surface – also called black silicon (b‐Si) – is a promising texture for solar cells because of its extremely low reflectance combined with low surface recombination obtained with atomic layer deposited (ALD) thin films. However, the challenges in keeping the excellent optical properties and…
The combined use of cross-polarization/magic-angle spinning (CP/MAS) 13 C NMR experiments and gauge-including projector-augmented wave (GIPAW) isotropic chemical shift calculations is an easy and useful method for the structural refinement of organic aggregates. In this study, the method is applied to an important mat…
BACKGROUND: Kashin-Beck disease is a kind of degenerative osteoarthropathy. Genetic factors may play an important role in the pathogenesis of KBD. OBJECTIVE: To investigate the association of the selenoprotein genes GPX1 (rs1050450, rs1800668, and rs3811699), TrxR2 (rs5748469), and DIO2 (rs225014) with Kashin-Beck dis…
Abstract The multi‐ligand coordination compound copper(II) 1,2‐diaminopropane (pn) azide, [Cu(pn)(N3)2]n (1), was synthesized using pn and azido groups. It was characterized by X‐ray single crystal diffraction, elemental analysis, and FT‐IR spectroscopy. The crystal structure of 1 belongs to the monoclinic system, spa…
Abstract Cosensitization, a technique involving sensitization of a metal-oxide semiconductor electrode with two or more different dyes, is a promising strategy to enhance light-harvesting capabilities of dye-sensitized solar cells through expansion of the light absorption range. In this review, we introduce recent dev…