Materials Literature
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We investigated the growth process of carbon nanowalls (CNWs) on a SiO 2 substrate by microwave plasma-enhanced chemical vapor deposition (MPECVD). It is revealed that the CNWs are grown at the fine-textured structure on the SiO 2 and the growth process does not require the catalyst. The CNW initially has a semicircul…
Over the last decade, applications of fibre-reinforced composites using polymer matrices have seen tremendous growth. In spite of the complexity of their behaviour and the unconventional nature of fabrication and other aspects, the usage of such composites, even for primary loadbearing structures in military fighters…
To evaluate the potential of carbon nanotube field effect transistors (CNFETs) to replace silicon CMOS technology, we develop a SPICE model of CNFET nanoelectronics. Our model is parameterizable, and it enables composition of models of various aspects of nanoelectronic behavior. Comparing CNFET nanoelectronics against…
It is essential to detect partial discharge (PD) as a symptom of insulation breakdown in gas-insulated substations (GIS). However, the accuracy of such measurement is often degraded due to the existence of noise in the signal. In this paper, a method using wavelet packet transform and neural network is proposed to sep…
Abstract Abiotic–biotic mechanisms of microstromatolitic spicular sinter (geyseritic) initiation and development were elucidated by in situ growth experiments at Champagne Pool (75 °C, pH 5.5). Siliceous sinter formed subaerially on glass slides placed along the margin of the hot spring. Environment–silica–microbe int…
The refraction of phase and power at the interface between free space and anisotropic media is studied. Under a TE incidence (electric field along y/spl circ/) and k/sub y/=0 incidence (where k/sub y/ is the y/spl circ/ component of the wave vector), a closed-form generalization of Snell's laws is proposed. The two re…
Samples from the saprolite and extensive smectite zone (up to 25 m thick) of the Murrin Murrin lateritic nickel deposit, developed from serpentinised peridotites, were studied using optical microscopy, XRD, SEM and TEM-EDX. In the saprolite zone, the initial mesh-texture of the parent rock is still well preserved. The…
This paper has experimentally investigated transient behavior of grounding electrode systems especially for a high impulse current up to 40 kA in particular reference with a mutual grounding resistance between the electrodes. The experimental results show that the mutual grounding resistance depends on the applied cur…
Fully epitaxial magnetic tunnel junctions (MTJs) were fabricated using a Co-based full-Heusler alloy Co 2 Cr 0.6 Fe 0.4 Al (CCFA) thin film and a MgO tunnel barrier. The fabricated MTJs had the following layer structure: MgO buffer layer/CCFA lower electrode/MgO tunnel barrier/CoFe upper electrode, grown on a MgO sing…
Manganese serves an important function in Lactobacillus plantarum in protection against oxidative stress and this bacterium can accumulate Mn(2+) up to millimolar levels intracellularly. Although the physiological role of Mn(2+) and the uptake of this metal ion have been well documented, the only uptake system describ…
This paper presents a theory to explain the characteristics of a sequential phase energization based inrush current reduction scheme. The scheme connects a resistor at the transformer neutral point and energizes each phase of the transformer in sequence. It was found that the voltage across the breaker to be closed ha…
We observe more than a 200-fold increase in the photoexcited phosphorescent emission of PtOEP (2,3,7,8,12,13,17,18-octaethyl-21H,23H-porphyrin platinum II) in a polystyrene film on nanotextured silver surfaces, coincident with a reduction in the triplet state lifetime by a factor of 5. The large enhancement results in…
Atomic force microscopy (AFM) of porphyrin aggregates formed on silica from acidic aqueous solution is used to investigate the basis for the previously reported counterion dependence of the optical spectra of aggregates of H(2)TCPP(2+), the diacid form of tetra(p-carboxyphenyl)porphyrin (TCPP). Resonance light scatter…
Abstract Pyrophyllite is the precursor to other smectite-group minerals which exhibit swelling. The mineral structure of pyrophyllite can lead to other minerals in the smectite group, including montmorillonite, through appropriate isomorphous substitutions. In this work, an atomic model of the pyrophyllite interlayer…
Abstract Recent experiments have brought new insights into the mechanisms which govern the plasticity of nanocrystalline metals. In particular, new opportunities have arisen from the finding that bulk nanocrystalline samples with extremely small grain size, prepared by the inert gas condensation technique, can be defo…
The finite-difference time-domain simulations in the frequency domain are used to study resonance phenomena in left-handed metamaterials consisting of the arrays of split-ring resonators (SRRs) and metal rods. It is demonstrated that, at frequencies corresponding to the band of enhanced transmission of the metamateria…
Nanotechnology, as a new enabling technology, has the potential to revolutionise agriculture and food systems in the United States of America and throughout the world. Examples of potential applications of nanotechnology in the science and engineering of agriculture and food systems include disease treatment delivery…
A test method that measures microclimate drying time is used to compare the ability of different knit materials to dissipate moisture vapor from a saturated clothing environment to the ambient atmosphere. The performance assessment provided by this novel method is compared with those from common test methods. The latt…
A continuous production of carbon black and hydrogen has been investigated by thermal decomposition of methane using a prototype processing system of direct current (dc)-radio frequency (RF) hybrid thermal plasma, which has great advantage over other thermal sources like combustion or dc plasma torches in synthesizing…
Ion modification techniques for improving the insulating and ferroelectric properties of BiFeO 3 (BFO) thin films are reported. Rare-earth-substituted BFO films with chemical compositions of Bi 1.00- x RE x Fe 1.00 O 3 [RE = La and Nd] were fabricated on (111)Pt/TiO 2 /SiO 2 /(100)Si substrates using a chemical soluti…