Materials Literature
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Abstract—This paper simulates the expected device perfor-mance and scaling perspectives of carbon nanotube (CNT) field-effect transistors with doped source and drain extensions. The simulations are based on the self-consistent solution of the three-dimensional Poisson–Schrödinger equation with open boundary conditions…
Abstract Uncooled infrared focal plane arrays are being developed for a wide range of thermal imaging applications. Fire-fighting, predictive maintenance, process control and thermography are a few of the industrial applications which could take benefit from uncooled infrared detector. Therefore, to answer these marke…
Materials formulated as La(2-x)Sr(x)NiO(4+delta) (0 <or=x<or= 1) have been prepared and investigated by high-resolution neutron powder diffraction in order to correlate the structural variation induced by the incorporation of Sr into the crystal lattice with the electronic and thermal properties of each material. The…
This paper investigates an alternative explanation for widely reported paradoxical intracellular water properties. The most frequent biological explanation assumes water structure extending multiple layers from surfaces of compactly folded macromolecules to explain large amounts of perturbed water. Long range water st…
Bulk quantities of nanocarbons having pre-selected morphology can be synthesized in a simple and rapid microwave heating approach directly from conducting polymers.
The properties of conversion coating on magnesium can be closely related to its microstructure and composition. This study investigated the evolution and microstructure of phosphate/permanganate conversion coating on AZ31 magnesium alloy. Results show that increasing the solution temperature reduced the growth rate of…
This article presents an overview of recent studies on the behavior of carbon nanotube dispersions. The effect of attractive interactions on the percolation threshold is investigated. Contrary to this, we show that carbon nanotubes experiencing repulsive interactions exhibit a different phase behavior including liquid…
Highly oriented ZnO nanoneedle/nanorods arrays have been fabricated by direct oxidation of zinc foil in alkaline zincate ion solution at near room temperature (20 degrees C for nanoneedles, 30 degrees C for nanorods).
The spontaneous stabilization of 6.5 nm bimetallic Ni–Cr cyanide bridged nanoparticles was achieved in water. Dispersible particles were recovered from solution using two different coating agents. The magnetic studies of the particles in the powder form show either a superparamagnetic or a spin glass like behaviour de…
Palladium-catalysed coupling of the vinyl derivatives methyl acrylate, styrene and acrylonitrile with 5-bromo-10,15,20-triphenylporphyrin (MTriPPBr; M = 2H, Ni, Zn) and 5,15-dibromo-10,20-bis(3,5-di-tert-butylphenyl)porphyrin (MDAPBr(2)) produced a series of mono- and disubstituted alkenylporphyrins, thus demonstratin…
Through the use of complex core-shell structures, white light emissions are observed from a single nanoparticle doped with multiple trivalent rare-earth ions. The internal structuring of the nanoparticle to allow for a controlled degree of energy transfer a common excitation wavelength yielding the white light emissio…
A series of novel red-emitting phosphors Ag La 0.95 Eu 0.05 ( W O 4 ) 2 − x ( Mo O 4 ) x [ x = 0 – 2 ] have been synthesized and their luminescence properties investigated. All Eu 3 + activated compositions show red emission on excitation either in the charge-transfer band or Eu 3 + levels. All compositions show remar…
Tungsten oxide semiconductor films for photoelectrochemical water-splitting applications, reactively sputtered at low temperatures ( < 300 ° C ) , have demonstrated photocurrents of 3.4 mA ∕ cm 2 under AM 1.5 illumination in 0.33M H 3 PO 4 , exceeding published results for material pyrolytically fabricated at higher t…
Nanofibrous mats of a wide variety of polyaniline derivatives can be synthesized without the need for templates or functional dopants by simply introducing an initiator into the reaction mixture of a rapidly mixed reaction between monomer and oxidant.
In pursuit of designing photocleavable liposomes as drug delivery vehicles, we synthesized several amphiphilic lipids by connecting stearyl amine (as the non-polar tail) and charged amino acids (as polar heads) via the o-nitrobenzyl derivatives. The lipids containing Glu, Asp, and Lys amino acids were subjected to pho…
A gas gun has been used to investigate the shock initiation of rods of a mixture of 74 wt% PTFE and 26 wt% aluminum powders. The rods were sabot‐launched into 4340 steel anvils at impact velocities ranging from 104 to 963 m/s. A framing camera was used to observe the time sequence of events. At low velocity, no initia…
The band structures of wurtzite ZnO are calculated by the empirical pseudopotential method (EPM). The eight parameters of the Zn and O atomic pseudopotential form factors are obtained with the formula of Schluter et al.[Phys. Rev. B 12, 4200 (1975)]. The band parameters are extracted by using a k∙p Hamiltonian to fit…
Kudra, T. and Ratti, C. 2006. Foam-mat drying: Energy and cost analyses. Canadian Biosystems Engineering/Le genie des biosystemes au Canada 48: 3.27 3.32. Foam-mat drying allows processing of hardto-dry materials such as tomato paste and a variety of fruit pulps and juices. Preferential product quality stems from acce…
The anode-supported solid oxide fuel cell (SOFC) degrades when the anode is subjected to redox cycling. The degradation has qualitatively been related to microstructural changes in the nickel-yttria stabilized zirconia anode of the tested cells. In this work, the microstructural changes were observed in situ using env…
In this paper, dual-band bandpass and bandstop filters using composite right/left-handed (CRLH) metamaterial transmission lines (TLs) are developed. The conventional bandpass and bandstop filters are first designed using quarter-wave short-circuited and open-circuited stubs, respectively. Then the dual-band filters wi…