Materials Literature
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Abstract A series of four different M 10 selenide cluster molecules of the general formula [M 10 Se 4 (SePh) 12 (PR 3 ) 4 ] (M = Zn, Cd, Hg; R = organic group) have been synthesized by the reaction of metal chlorides MCl 2 (M = Zn, Cd, Hg) with phosphanes PR 3 , Se(SiMe 3 ) 2 and PhSeSiMe 3 in organic solvents. The in…
We report on a high efficiency tapered grating surface-emitting laser with an antireflection-structured (ARS) substrate. A 64% improvement of the device efficiency is obtained by monolithic integration of a sawtooth-shaped ARS on the GaAs substrate. Slope efficiencies of 0.82 W/A were measured at 975 nm in pulse pumpi…
Partial discharge (PD) characteristics in air and argon under low pressures down to 13.3 Pa (0,1 Torr) and 60 Hz AC energization are studied in an energized needle-plane electrode arrangement. The electrode configuration, vacuum chamber, facilities, and electrical connections for the experimental setup are described.…
Electrons are generally emitted from the tip of a carbon nanotube (CNT) when the CNT stands on a substrate, but it is not clear where electrons are emitted when a CNT is bent or lies down on a substrate. We have investigated the field emission properties of the side wall of a multi-walled carbon nanotube (MWNT) compar…
Abstract The new polyoxotungstates (NH4)5Na9[Cu4(H2O)2(GaW9O34)2]·22 H2O (1) and (NH4)14[Zn4(H2O)2(GaW9O34)2]·37 H2O (2) were synthesized in aqueous solution and characterized by IR and Raman spectroscopy, energy dispersive X‐ray fluorescence and single‐crystal X‐ray analysis. Compounds 1 and 2 contain the trivacant α…
[reaction: see text] The unusually stable perchloro-2,5,8-triazaphenalenyl radical 1 and its twisted dechlorinated dimer 2 were synthesized and characterized by ESR spectroscopy and X-ray crystallography. The X-ray structure of dimer 2 shows that the double bond connecting the two triazaphenalene systems is strongly t…
In this paper, we present scaling impacts on electromigration-induced mass transport in narrow single-damascene Cu interconnects. Linewidths ranging from 0.12 µm to 0.20 µm were used to demonstrate the impacts. Lifetimes that are determined by resistance degradation decrease according to decreasing linewidth at a fixe…
Abstract The mineral conichalcite from the western part of Bagdad mine, Bagdad, Eureka District, Yavapai County, Arizona, USA has been characterized by electronic, near-infrared (NIR), Raman and infrared (IR) spectroscopy. Scanning electron microscopy (SEM) images show that the mineral consists of bundles of fibres. C…
As candidate blanket concepts for a U.S. advanced reactor power plant design, with consideration of the time frame for ITER development, we assessed first wall and blanket design concepts based on the use of reduced activation ferritic steel as structural material and liquid breeder as the coolant and tritium breeder.…
Abstract The 1:1 reactions of the new bis(terdentate) diamide ligand N , N ' ‐bis(2‐pyridylmethyl)pyrazine‐2,5‐dicarboxamide(H 2 L 1 ) and its higher homologue N , N ' ‐bis[2‐(2‐pyridyl)ethyl]pyrazine‐2,5‐dicarboxamide (H 2 L 2 ) with Cu(BF 4 ) 2 · 4 H 2 O in the absence of added base have consistently afforded dicopp…
Novel functionalized conductive polymers are synthesised using modification reactions of polyaniline: diazonium coupling, nucleophilic addition and N-nitrosation. Diazonium salt coupling with polyaniline renders modified polymers which are soluble in common solvents and electroactive. Nucleophilic addition could also…
We present the experimental realization of a one-dimensional left-handed/right-handed resonator. The left-handed (LH) part of the resonator is formed by a solid-state-like metamaterial composed of /spl Omega/ metallic structures, while the right-handed part is just air. The resonant behavior is successfully observed a…
High voltage stator windings in modern electric generators are subject to high electrical, mechanical, and thermal stress. Operation of these machines in both air and high pressure hydrogen results in different considerations. Operation in the air environment does not offer the dielectric advantages of operating in hi…
The crystal structure of a Cu-rich tennantite from Cerro Atajo, province of Catamarca, northwestern Argentina, has been refined using single-crystal data (MoKX-ray diffraction, CCD detector, R1 = 0.03). It crystallizes in space group I3m, with a = 10.1756(9) A. The X-ray-diffraction analysis led to the formula Cu12.5(…
Abstract Pot experiments with soils from three contaminated sites and an additional field experiment were conducted. The aim of the experiments was to test different organic and inorganic soil amendments to heavy metal uptake and to alleviate toxicity in different agricultural crops. Elements in the extracts were meas…
Abstract Gold‐containing chromatographic beads were used to record spectra of the tripeptide glutathione and the protein immunoglobulin G (IgG) by surface‐enhanced Raman scattering (SERS) spectroscopy. SERS spectra were recorded from glutathione in solution at three different pH values, 2, 6 and 10. It was found that…
This paper presents a novel approach in the area of time dependent partial discharge (PD) pulse pattern recognition, to applications based on the inductive learning (decision tree) approach. Different attributes based on pulse shape analysis are used as representative feature vectors that can accurately capture the un…
In dry jet-wet spinning of a cellulose/ N-methylmorpholine N-oxide hydrate solution, the effects of the hydration number n in NMMO hydrates and the concentration and molecular weight of cellulose are investigated in terms of the physical properties of the fibers. Dry jet-wet spinning of lyocell fibers is also investig…
Abstract The Sr 3 Fe 2 MoO 9 double perovskite has been prepared in polycrystalline form by heat treatment, in air, from previously decomposed citrate precursors. This material has been studied by X‐ray (XRD), neutron powder diffraction (NPD) and magnetic measurements. At room temperature, the crystal structure is tet…
Abstract High-temperature oxide-melt solution calorimetry and acid-solution calorimetry were used to determine the heat of dissolution of synthetic goethite with particle sizes in the range 2–75 nm and measured surface areas of 30–273 m 2 /g (27–240 × 10 3 m 2 /mol). Sample characterization was performed using X-ray d…