Materials Literature
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Extraordinary magnetoresistance devices with critical dimensions below 50 nm have been developed in InAs 2-D electron gas (2DEG) quantum well heterostructures, and show the same magnetic sensitivity as Giant magnetoresistance magnetic recording sensors. A new device design, in which fingers of metal extend into the se…
The trinuclear complex, Au(3)(MeN=COMe)(3), which displays a number of remarkable properties including solvoluminescence, has been found to undergo electrochemical oxidation with the deposition of long, thin needles on the electrode surface. The electro-deposition process has been studied by cyclic voltammetry, chrono…
Exfoliated polymer/clay nanocomposites with high clay contents were facilely constructed by the vapor-phase assisted surface polymerization of methyl methacrylate (MMA) with montmorillonite premodified with a trimethylstearyl ammonium salt and a free radical initiator: 2,2′-azobis(isobutyronitrile). This method requir…
Micelles of hydrophilic−hydrophobic block polymers, such as poly(ethylene glycol)− block -poly(ϵ-caprolactone) (PEG− b -PCL), used as drug-delivery carriers, are generally fabricated via solvent displacement or dialysis, which is time-consuming, requires freeze drying, and can leave toxic traces of the residual organi…
Density functional theory calculations reveal a two-step scenario for silicon oxidation nucleation. We detail a quasibarrierless semihexagonal oxide nucleus, involving an unexpected adjacent dimer oxygen bridging bond. It is formed upon ${\text{O}}_{2}$ chemisorption at 0.5 monolayer on $\text{Si}(100)\text{\ensuremat…
Abstract We report high breakdown combined with low on‐resistance results on AlGaN/GaN/AlGaN double heterostructure devices (DHFET) grown on 4 inch Silicon substrates. On two fingers devices with gate‐drain distance (LGD) of 8 μm we measured a breakdown voltage (VBD) of 650 V and an on‐resistance (Ron) of 7.2 Ω·mm. We…
How to connect: Individual ultralong Ag@C coaxial nanocables can be used as potential interconnects. The nanocables show excellent electrical transport properties in the temperature range of 5.76–300 K (see picture), and the room-temperature conductivity of the Ag nanowire core is almost the same as that of the bulk s…
To realize the high-rate and low-damage sputtering of a Si surface, the effect of irradiating an ethanol cluster ion beam on a Si surface was investigated. The sputtering depths in Si substrates induced by the ethanol cluster ion beam irradiation were larger than those in SiO 2 substrates, which was due to a chemical…
Aqueous extract of pericarp of Garcinia was prepared by sonicator for quick extraction of the colorant and has been used for dyeing cotton, silk and wool yarn. 1-2 % of premordanting with metal salts of Al, Sn, Fe, Cr and Cu was done. Fe, cu and Cr are best suited mordants for garcinia. The hue color ranged from camel…
In hardware implementations of many signal processing functions, timing errors on different circuit signals may have largely different importance with respect to the overall signal processing performance. This motivates us to apply the concept ofunequalerrortoleranceto enable the use of voltage overscaling at minimal…
AlGaN/GaN heterostructure Schottky barrier photodetector (PD) with multi-MgxNy/GaN buffer was proposed and fabricated. Compared with AlGaN/GaN heterostructure PD prepared on conventional low-temperature GaN buffer, it was found that we can reduce dark leakage current by more than three orders of magnitude. It was also…
Abstract A novel technique is proposed for the growth of an InN film on a GaN/Al2O3 (0001) template by radio‐frequency plasma‐excited molecular beam epitaxy (RF‐MBE). The method involves 1) InN growth under an In‐rich condition and 2) additional nitrogen radical irradiation after the InN growth under an In‐rich condit…
Chemical mechanical polishing (CMP) is vital in the manufacturing of integrated circuits (IC). CMP removes unwanted material from an IC surface by rubbing it with numerous nanoscale abrasives that are brought into contact by polishing pad asperities. Friction is a consequence of this rubbing, and this friction may dam…
The influence of surface roughness in a rail/wheel contact has been a concern for railway owners since the introduction of ‘rail grinding’ as a maintenance strategy. Presently, there are no well-defined guidelines regarding the surface topographies of ground rails and re-turned wheels. There is thus a need to establis…
Abstract In this paper we report on a comparison of the optical properties of a series of semi‐polar (11‐22) InGaN/GaN multiple quantum well structures with those of a series of polar (0001) control samples. In the semi‐polar structures we observe blue‐shifts of the quantum well emission, increases of the radiative re…
Abstract Fully microscopic many‐body models are used to study the importance of radiative and Auger carrier losses in InGaN/GaN quantum wells. Since the usual direct bandto‐band Auger losses are too small to explain the experimentally observed droop of the external quantumefficiency in such structures, phonon assisted…
A MgB2superconductor was prepared from Mg flakes or powders and B powders using the powder-in-tube technique with explosive consolidation. Compaction of Mg and B powders resulted in a two-phase alloy, due to the relatively low temperature developed during compaction as well as the very short duration of the process. F…
Anionic liposomes containing a 4:1 molar ratio of neutral to anionic phospholipids were treated with an excess of five zwitterionic polymers differing only in the spacer length separating their cationic and anionic moieties. Although the polymers do not disrupt the structural integrity of the liposomes, they can induc…
UNLABELLED: Studies on proteins are often restricted to highly simplified models to face the immense computational complexity of the associated problems. Constraint-based protein structure prediction (CPSP) tools is a package of very fast algorithms for ab initio optimal structure prediction and related problems in 3D…
Fracture toughness and critical energy release rate of polyester-reinforced glass fibres were investigated using linear elastic fracture mechanics approach. The effect of fibre volume fraction of chopped strand mat glass fibres in the matrix on the composite properties was considered. Finite-element analysis using FRA…