Materials Literature
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An InNbO4 thin film was prepared by a sol-gel method. The photoinduced amphiphilic (hydrophilic and lipophilic) property on the film was determined from the changes in contact angles for water and diiodomethane (CH2I2) under light (lambda>300 nm) irradiation. Before light irradiation, the contact angles for water and…
Polysiloles have recently received much attention1 because of their unusual electronic properties. These unusual optical and electrical properties can be useful in electronic devices, such as electron transporting materials,2 light-emitting diodes (LEDs),3-5 and chemical sensors.6,7 Poly(2,3,4,5-tetraphenyl)siloles (1…
The cloudiness of hydrogen-bonded LBL films assembled from polyvinylpyrrolidone (PVPON) and poly(acrylic acid) (PAA) is studied in detail by two approaches: spectroscopy (Fabry-Pérot fringes) and microscopy (AFM). Fabrication parameters such as temperature, molecular weight, pH value, and rinsing time, have notable in…
Dielectric studies of methyl acrylate with 1-propanol, 1-butanol, 1-heptanol and 1-octanol binary mixtures have been carried out over the frequency range from 10 MHz to 10 GHz at temperatures of 283, 293, 303 and 313 K using Time Domain Reflectometry (TDR) for various concentrations. The Kirkwood correlation factor an…
Fuel cells offer the prospect of silent electrical power generation at high efficiency with near-zero pollutant emission. Many materials and fabrication problems have now been solved and attention has shifted toward system modeling, including the fluid flows that supply the cells with hydrogen and oxygen. This review…
Hollow triangular cones of packed calcite needles, which have never been seen before in natural biominerals, were prepared using a double-decomposition precipitation method. These are shown to be oriented attachments of inverted triangular cones toward crystalline superstructures in addition to “mesocrystal” formation.
The replica RISM theory is used to investigate the structure of electrolyte solutions confined in carbonized polyvinylidene chloride (PVDC) nanoporous material, compared to bulk electrolyte solution. Comparisons are made between the models of electrolyte solution sorbed in the carbonized PVDC material and a single car…
Using the first-principles plane-wave pseudopotential method within density functional theory, we have systematically investigated structural, electronic, and mechanical properties of , (; ; and ) nanowires and bulk phase of . We found that not only , but also transition metal and chalcogen atoms lying in the same col…
Zwei in Eins: Ein an zwei photochrome Einheiten gebundenes Porphyrin fungiert als digitaler 2:1-Multiplexer (MUX). Wärme und rotes Licht sind die Eingangsdaten (ein 1 und ein 2), und ein dritter, schaltbarer Eingang (grünes Licht, sel) entscheidet, ob als Ausgang (Porphyrinfluoreszenz) der Zustand von „ein 1“ oder von…
Formation of nanostructured hexagonal alkali tungstates (HTBs) from ammonium metatungstate (AMT) and alkali chlorides has been investigated by a combined strategy encompassing in situ spectroscopic techniques and hydrothermal synthetic studies. They demonstrate how the morphology of the HTBs can be tuned by the straig…
The elastic constants and thermodynamic properties of c-BN are calculated using the first-principles plane wave method with the relativistic analytic pseudopotential of the Hartwigen, Goedecker and Hutter (HGH) type in the frame of local density approximation and using the quasi-harmonic Debye model, separately. Moreo…
S.S584-S588
Auf Befehl aufrollbar: Hochgeordnete ferroelektrische Flüssigkristall- Elastomerfilme mit niedriger Glasübergangstemperatur verbiegen sich unter Bestrahlung (siehe Bild). Wird Licht der Wellenlänge 366 nm eingestrahlt, neigen sich die Filme längs der Orientierungsrichtung der Mesogene der Strahlungsquelle zu; sichtbar…
The $\ensuremath{\kappa}\mathrm{\text{\ensuremath{-}}}(\mathrm{ET}{)}_{2}X$ layered conductors (where ET stands for BEDT-TTF) are studied within the dimer model as a function of the diagonal hopping ${t}^{\ensuremath{'}}$ and Hubbard repulsion $U$. Antiferromagnetism and $d$-wave superconductivity are investigated at…
The properties of polyelectrolytes anchored on surfaces depend on a broad range of parameters including the characteristics of the polyions, salt concentration, ion valence, and solvent conditions. While these systems have been subjected to extensive theoretical and experimental investigations in particular in the bru…
Molecular dynamics (MD) simulations, based on a new coordination-dependent charge-transfer potential, were used to study the behavior of ${\mathrm{B}}_{2}{\mathrm{O}}_{3}$ in response to various thermal and mechanical constraints. This interaction potential allows for the charges on atoms to redistribute upon the form…
PURPOSE: To test in vitro whether gadolinium-based contrast agents induce fewer toxic effects on renal tubular cells than does an iodinated contrast medium at concentrations used for angiography. MATERIALS AND METHODS: LLC-PK1 cells were incubated with iomeprol, gadopentetate dimeglumine, gadobenate dimeglumine, gadot…
Spectral analysis of the Shubnikov-de Haas magnetoresistance oscillations and the quantum Hall effect (QHE) measured in quasi-2D highly oriented pyrolytic graphite (HOPG) [Phys. Rev. Lett. 90, 156402 (2003)] reveals two types of carriers: normal (massive) electrons with Berry phase 0 and Dirac-like (massless) holes wi…
A microscopic model for describing ferroelectric nanoparticles is proposed which allows us to calculate the polarization as a function of an external electric field, the temperature, the defect concentration and the particle size. The interaction of the constituents of the material, arranged in layers, depends on both…
The shape evolution of two-dimensional islands under electromigration-driven periphery diffusion is studied by kinetic Monte Carlo (KMC) simulations and continuum theory. The energetics of the KMC model is adapted to the Cu(100) surface, and the continuum model is matched to the KMC model by a suitably parametrized ch…