Materials Literature
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It is demonstrated with powerful evidence that the extraordinary transmission of a metallic grating is undoubtedly due to the excitation of standing surface plasma waves in the Fabry-Perot like resonator. This is the first time that the strong standing waves set up in the groove of a sub-wavelength double-layer gratin…
Abstract Tungsten oxide thin films with protons intercalated during deposition (H x WO 3 ) were prepared using reactive direct‐current magnetron sputtering in a gas mixture of argon, oxy‐gen, and hydrogen. The as‐deposited films were tungsten bronze. The concentration of intercalated protons, given by the x ‐values in…
The crystal structure of the mineral lautite (copper arsenic sulfide), CuAsS, previously described as either centrosymmetric [Pnma; Marumo & Nowacki (1964 ▶). Schweiz. Miner. Petro. Mitt.44, 439-454] or noncentrosymmetric [Pna2(1); Craig & Stephenson (1965 ▶). Acta Cryst.19, 543-547], was reinvestigated by means of si…
Abstract The evolution of the ceria‐praseodymia mixed oxide promoter throughout the successive steps involved in the preparation of a 3% Rh/25% Ce 0.8 Pr 0.2 O 2− x /Al 2 O 3 –3.5% SiO 2 catalyst is studied with the help of X‐ray diffraction (XRD), spatially resolved electron energy loss spectroscopy (EELS), XPS, and…
Thermodynamic properties of molten Al-Mn, Al-Cu and Al-Fe-Cu alloys in a wide temperature range of 1123-1878 K and the whole range of concentrations have been studied using the integral effusion method and Knudsen mass spectrometry. Thermodynamic functions of melts were described by the associated solution model. The…
The complex charge ordering phenomena for polycrystalline La(1-x)Sr(x)FeO(3) (1/3≤x≤2/3) have been studied by measuring the low temperature magnetization, resistivity and the longitudinal ultrasonic velocity (V(l)). At low doping levels (1/3≤x≤0.5), a dramatic velocity increase is observed below 210 K, and the relativ…
Abstract The improvement of the properties of commingled plastics was carried out with a prototype blend of Mexican municipal plastic waste with and without poly(vinyl chloride) (PVC). Compatibilizing agents such as high‐density, low‐density, and linear low‐density polyethylenes modified with maleic anhydride were use…
Abstract Ellipsometric porosimetry (EP) has recently appeared to be a suitable non‐destructive technique for the characterization of porous ultra low‐κ (ULK) dielectrics. The analysis of ellipsometric spectra of a film during adsorption and desorption cycles of an adsorptive, allows the determination of its open pore…
Polycrystalline Ni nanowires have been prepared by electrochemical deposition in an anodic alumina membrane template with a nanopore size of about 60 nm. In situ heating extended x-ray absorption fine structure and x-ray diffraction techniques are used to probe the atomic structures. The nanowires are identified as be…
Ba 5 In 0.93 Mn 4 O 14.40 was synthesized in air at 1300 °C by traditional solid state reaction and structurally characterized using powder X-ray diffraction, neutron diffraction, and selected area electron diffraction (SAED). It crystallizes in the hexagonal space group P 6 3 / mmc with a = 5.7389(1) Å and c = 23.641…
Catalytic trimerization of isobutene to produce triisobutenes has been performed over cation-exchange resin and zeolite catalysts. Resin catalysts have the advantage of long lifetime and high trimers selectivity even though the regeneration of an aged catalyst is not satisfactory. On the contrary, zeolite catalysts ca…
The leading electronic interactions governing the local physics of the CE phase of half-doped manganites are extracted from correlated ab initio calculations performed on an embedded cluster. The electronic structure of the low-energy states is dominated by double exchange configurations and $\mathrm{O}\phantom{\rule{…
Abstract The application of spectroscopic processing techniques to multi‐spectral XPS data sets has enabled the acquisition of quantitative surface chemical state images. Such data sets are necessarily large, incorporating many spectra, so prohibiting interactive processing. Instead multivariate analytical techniques…
A two-dimensional model within the Q-tensor description of liquid crystals is used to describe the inhomogeneous order reconstruction in a nematic cell driven by tony modulation in the anchoring conditions. Homogeneous and inhomogeneous reconstruction are contrasted: the former is defectless, the latter is defect medi…
AIMS: We have recently found that preconditioning of stainless steel surfaces with an aqueous fish muscle extract can significantly impede bacterial adhesion. The purpose of this study was to identify and characterize the primary components associated with this bacteria-repelling effect. METHODS AND RESULTS: The anti-…
Based on density functional theory, we investigate the electronic structures of an organic molecular solid, ${(\mathrm{EDO}\text{\ensuremath{-}}\mathrm{TTF})}_{2}\mathrm{P}{\mathrm{F}}_{6}$ $(\mathrm{EDO}\text{\ensuremath{-}}\mathrm{TTF}=\text{ethylendioxy}\text{\ensuremath{-}}\text{tetrathiafulvalene})$, which is kno…
Abstract To clarify optical properties of DLC‐Si film, we have studied the change in optical constants of the DLC‐Si films as a function of the Si content using spectroscopic ellipsometry. Using the 4 layered structure model (substrate/interface/film/surface roughness/adsorbed water/air), the thickness of each layer a…
Four new rare earth gallosilicates, Rb 2REGaSi4O12 (RE = Y, Eu, Gd, and Tb, denoted as REGS-1), have been synthesized under high-temperature, high-pressure hydrothermal conditions and characterized by single-crystal X-ray diffraction. They are the first examples of rare earth gallosilicates that contain individually o…
We report on the dynamic properties of Permalloy nanostrips at gagahertz frequencies. The thickness of the strips is 100nm, strip width is 300nm, strip spacing is 1μm, and length is 0.3–100μm; aspect ratios are 1:1, 1:2, 1:3, 1:5, 1:10, and 1:333. The dynamic behavior was studied by network analyzer ferromagnetic reso…
RNA serves as an effective template for the synthesis of quantized CdS nanoparticles and mediates their growth to create novel assemblies. Unlike DNA-stabilized particles in aqueous medium, these particles display relatively strong emission at 2.34 eV, which is further enhanced by more than 2.5 fold and blue shifts to…