Materials Literature
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Ferromagnetic Co-doped rutile TiO2 single crystals were synthesized by high-temperature ion implantation and characterized by a variety of techniques. Co is uniformly distributed to a depth of ∼300 nm with an average concentration of ∼2 at. %, except in the near-surface region, where the concentration is ∼3 at. %. Fer…
The spatial correlation functions of the thermal fluctuations in systems with smoothly varying structure are calculated by means of the WKB method. As a particular physical problem we consider the behavior of director fluctuations in cholesteric liquid crystals possessing one-dimensional spatial periodicity. The probl…
The grain boundary (GB) of nanocrystalline ZnO films is investigated using the x-ray absorption fine structure technique. With the advantage of the dominant GB volume fraction in our samples, the GB structure is found to be neither simply “gas-like” nor “similar to that of coarse-grained phase,” but experiences a tran…
The pseudocubic lattice parameter of lanthanum molybdate, La 2 Mo 2 O 9 , has been measured as a function of temperature between 13 and 1100 K. These data show an anomaly at 842 K, associated with the alpha (pseudocubic monoclinic, non-conducting) to beta (cubic, conducting) phase transition. For a sample which has be…
A near-infrared (NIR) luminescent erbium (III) ternary complex has been prepared with an ion-associating sensitizer of IR5, a NIR dye whose large absorption cross section covers the visible spectrum around 488 nm and especially the NIR spectrum around 980 nm. In this paper NIR photoluminescence from the complex in bul…
The AF0591 gene of Archaeoglobus fulgidus (DSM4304; gi-number: 2650039) encodes a conserved hypothetical protein, with a molecular weight of 15,335 Da (residues 1–135) and a calculated isoelectric point of 8.5. In order to extend the structural coverage of the Protein Family database (PFAM),1 we selected 331 bacterial…
The temperature (T) dependence of the charge-stripe order in La2-xSrxNiO4 has been investigated in the vicinity of x approximately 1/3 by synchrotron radiation x-ray diffraction measurements. With decreasing T, a prominent commensurate-incommensurate (C-IC) crossover is observed in the x<1/3 region, while for the x>1/…
Moving the labels: The dynamics of surface lattice oxygen atoms is demonstrated using 18O-labeled MgO and CaO catalysts. The incorporation of 18O into the products of the pseudo-Canizzaro reaction under mild conditions (see Figure) illustrates the nucleophilicity of the oxide surfaces and indicates a reaction mechanis…
Abstract Nishizawa Technical Institute (NTI) and Kyoto Institute of Technology (KIT) have developed EVA‐clay nanocomposites with excellent mechanical and flame retardant properties by a reactive process and have succeeded in a novel method to synthesize an aluminium hydroxide nanoparticle, which has the effect of impr…
The electronic structures of hole-doped La 0.7 Ca 0.3 MnO 3 and electron-doped La 0.7 Ce 0.3 MnO 3 manganites are investigated by x-ray absorption near-edge structure spectroscopy at the O and Mn K-, and Mn L 3,2 -edges. The Mn K- and L 3,2 -edge results show that Ce dopants increase the occupation of the Mn 4p and ma…
We determine the phase diagrams of two widely studied protein solutions, namely, lysozyme and γ-crystallin in water and added salt, within a short-range, pair-potential representation of macroparticle interactions. A one-parameter fit of the model is performed on the basis of static or dynamic light scattering and sel…
Better with gold! Gold nanoparticles have a deep red color and an absorption maximum at about 530 nm. They have been used to remarkably improve the performance of silver chloride photoanodes for photoelectrochemical water oxidation to dioxygen. The Figure shows O2 production versus time for an AgCl electrode modified…
The best of both worlds: An organic bilayer, composed of a perylene derivative (PV) and a phthalocyanine (H2Pc), was found to be a novel example of a photoanode involving a catalytic oxidation in water (see graphic). Based on the action spectrum for photocurrent, it is noted that the widespread visible light absorptio…
Incorporating multiwall carbon nanotubes (CNTs) directly into the cylindrical cathode of Ni screen/BN/Ni microplasma devices significantly improves all device performance parameters—operating and ignition voltages, as well as radiative efficiency. Having a cathode diameter of 200 μm, these devices exhibit operating vo…
Based on experimental observations of modulated magnetic patterns in a Co0.5Ni0.205Ga0.295 alloy, we propose a model to describe a (purely) magnetic tweed and a magnetoelastic tweed. The former arises above the Curie (or Néel) temperature due to magnetic disorder. The latter results from compositional fluctuations cou…
Traditional understanding of dissolution assumes that the reaction is spontaneous and continues until equilibrium is reached. This paper presents theoretical and experimental data to support a dissolution mechanism that involves the existence of critical conditions for dissolution, in which the reaction is accompanied…
The doping of lanthanide ions in semiconductor TiO2 nanoparticles is studied. The presence of the TiO2 absorption band in the excitation spectrum of the lanthanide (see graphic; excitation and emission) proves the existence of energy transfer from the host material to the lanthanide ion. Energy transfer to several lan…
ZnO films were grown on low-temperature (LT) buffer layers on sapphire a-plane (11–20) substrates by radical source molecular-beam epitaxy. The LT buffer layers were found to effect the electrical properties of subsequently grown undoped ZnO films, and their presence was found to be indispensable for the growth of fil…
We report on three-photon excited band edge and trap emission of CdS semiconductor nanocrystals. While the band edge emission intensity clearly shows a cubic dependence on excitation intensity, demonstrating three-photon absorption process, the trap emission does not exhibit such a cubic dependence. A simple theoretic…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTEffect of Metastable Liquid−Liquid Demixing on the Morphology of Nucleated Polymer CrystalsWenbing Hu and Daan FrenkelView Author Information FOM Institute for Atomic and Molecular Physics, Kruislaan 407, 1098 SJ Amsterdam, The Neth…