Materials Literature
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In this paper we show that magnetic-dipolar-mode (MDM) oscillations of a quasi-2D ferrite disk are characterized by unique symmetry features with topological phases resulting in appearance of the magnetoelectric (ME) properties. The entire ferrite disk can be characterized as a pair of two, electric and magnetic, coup…
We present an exact solution for the electrostatic field between a metallic hemi-ellipsoidal needle on a plate (as a cathode) and a flat anode. The basic idea is to replace the cathode by a linearly charged thread in a uniform electric field and to use a set of "image" charges to reproduce the anode. We calculate the…
Using first-principles density functional calculations, we study the electronic and magnetic properties of the ferromagnetic insulating double perovskite compound La2NiMnO6, which has been reported to exhibit an interesting magnetic field sensitive dielectric anomaly as a function of temperature. Our study reveals the…
The crystal structure and numerous normal and superconducting state properties of layered tetragonal $(P4∕nmm)$ LaFeAsO, with F doping of $\ensuremath{\approx}11%$, are reported. Resistivity measurements give an onset transition temperature ${T}_{c}=28.2\phantom{\rule{0.3em}{0ex}}\mathrm{K}$, and low field magnetic su…
A small percentage of platinum added to silver/gold alloys that are then electrochemically dealloyed yields an extremely high surface area nanoporous metal, with pore size less than 4 nm, as shown in the figure (scale bar = 5 nm). The presence of surface platinum stabilizes the nanostructure to coarsening in air and e…
We demonstrate the use of an ordinary white-light microscope for the study of the q-dependent dynamics of colloidal dispersions. Time series of digital video images are acquired in bright field with a fast camera, and image differences are Fourier analyzed as a function of the time delay between them. This allows for…
Filled skutterudites are one of the most promising thermoelectric materials for power generation applications. The choice and concentration of filler atoms are key aspects for achieving high thermoelectric figure of merit values. We report on the high temperature thermoelectric properties in the double-filled skutteru…
Abstract Graphite, inexpensive and available in large quantities, unfortunately does not readily exfoliate to yield individual graphene sheets. Here a mild, one‐step electrochemical approach for the preparation of ionic‐liquid‐functionalized graphite sheets with the assistance of an ionic liquid and water is presented…
The rheology of bubble-bearing magma is important in volcanic conduit flow. Its rheological properties strongly depend on the deformation of bubbles in highly viscous liquid. Here we conduct an experimental investigation on the deformation of bubbles in a Stokes pipe flow, in which the shear rate is non-uniform. The d…
Abstract The relationship between grain‐boundary capacitance and extrinsic shallow donors caused by Nb addition to SnO 2 ·CoO binary polycrystalline system has been investigated by means of combined techniques such as I – V characteristic response, complex impedance and capacitance analysis and electrostatic force mic…
Pt nanoparticles and Pt/spherical carbon (SC) were prepared in a heterogeneous (PtO2/SC, water/ethanol) solid-liquid system without dispersant using ultrasound and microwave irradiation. The Pt nanoparticles and Pt/SC were characterized using X-ray diffraction (XRD), transmission electron microscopy-energy-dispersive…
Abstract The influence of the applied magnetic field on the magnetocaloric properties of a fine magnetic particle system has been studied using a Monte Carlo technique. By simulating zero field cooling (ZFC) curves under different strengths of the applied magnetic field, we have analyzed the variation of the entropy f…
Abstract Luminescence spectra obtained by electron bombardment (cathodoluminescence, CL) on bundles of pristine single walled (SWCNT) and multi walled carbon nanotubes (MWCNT) show several common peaks at 1.76, 1.94, 2.06, and 2.22 eV which disappear after heating the samples up to 1300 K. We show that these transitio…
Abstract Novel composites based on poly(p‐dioxanone) (PPDO) and organically modified cationic and anionic clays have been prepared using the technique of melt‐extrusion. The intercalation of the organic modifier in the clays and the dispersion degree of the organically modified clays in the PPDO composites have been a…
Inorganic-organic hybrid semiconductor nanofibers of CdS/CHA (CHA = cyclohexylamine) were successfully synthesized by a simple solvothermal method. The fibers obtained had average diameter of 20 nm and length of several micrometers. In these fibers, periodic layer-like sub-nanometer structures with thickness of approx…
Purpose This paper aims to discuss the development of a software tool UniverFilter™ which is capable of geometrical modelling of 3D woven fabrics, interfacing with computational fluid dynamics tools to numerically determine the fluid (and more specifically liquid) flow path and simulating the filtration process by int…
Abstract It is shown that the dominant conduction mechanism in single‐wall carbon nanotube networks at room temperature is variable range hopping. Thin networks follow a variable range hopping law throughout the temperature range 4 K < T < 300 K, thick networks display variable range hopping characteristics in t…
The gene encoding a novel alcohol dehydrogenase (ADH) that belongs to the short-chain dehydrogenase/reductase (SDR) superfamily was identified in the extremely thermophilic, halotolerant gram-negative eubacterium Thermus thermophilus HB27. The T. thermophilus ADH gene (adh(Tt)) was heterologously overexpressed in Esch…
Perfektes Timing: Bei dem vorgestellten Pro-PARACEST-Agens zum Nachweis von β-Galactosidase-Aktivität spaltet das Enzym den Benzyloxycarbamat-Linker, der das enzymspezifische Substrat enthält, und liefert so [Yb(dota-NH2)]−, das einen PARACEST-Effekt zeigt. Dies ist die erste Verbindung aus einer Familie molekularer B…
Copper films with high density of twin boundaries are known for high mechanical strength with little tradeoff in electrical conductivity. To achieve such a high density, twin lamellae and spacing will be on the nanoscale. In the current study, 10 microm copper films were prepared by pulse electrodeposition with differ…