Materials Literature
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The periodic composite medium consisting of two lattices of different dielectric spherical particles bas been investigated analytically and numerically. It is shown that effective isotropic double negative media (DNG) can be realized in the frequency region where resonance of TM mode in one kind of particles and TE mo…
The fabrication of high quality, robust and photoactive ITO electrodes—in the form of well-defined two- and three-dimensional films—is reported following the Langmuir–Schäfer (LS) and the layer-by-layer (LBL) methods. In the LS approach C60-NiP multilayers were transferred from the air–water interface, while the LBL a…
One-dimensional (1D) needle-like ZnO nanowhiskers have been grown directly from aqueous solution containing Zn(OH)(4)(2-) ions produced by zinc chloride and sodium hydroxide, in the presence of sodium dodecyl sulfate (SDS).
Indium nitride micro- and nanostructures have been prepared by the reaction of indium oxide and ammonia in the temperature range 600–730 °C. Depending on the reaction temperature, nanoparticles with a diameter of 50–100 nm, nanowires with a diameter of ∼100 nm and of varying length, hollow microtubes or two-dimensiona…
In cold environments, the moisture produced by the human body will partly condense within the layers of an ensemble. Water vapor transfer and moisture accumulation in the layers of different four-layer combinations are analyzed at several moderately cold temperatures with a sweating arm, which simulates the thermophys…
Abstract Summary: Polyoxymethylene (POM)/elastomer/filler ternary composites were prepared, in which thermoplastic polyurethane(TPU) and an inorganic filler, CaCO 3 , were used to achieve balanced mechanical properties of POM. A two‐step processing method, in which the elastomer and the filler were mixed to a masterba…
PbSe and CdSe nanocrystals capped with oleic acid have been synthesised starting from metal oleates and investigated by X-ray diffraction, transmission electron microscopy and optical spectroscopy.
Dimers of inclusion complexes were formed from a new cryptand and viologens (paraquats) driven by dipole-dipole and face-to-face pi-stacking interactions as shown by mass spectrometric characterization and X-ray analysis.
Combinatorial sputtering methods were used to produce thin films of amorphous Si-Al-Mn whose composition varied in a linear and orthogonal manner. Electrochemical investigations were performed on over 200 compositions of Si-Al-Mn with either standard coin-type test cell hardware or a 64-channel combinatorial electroch…
Hematite@silica@polypyrrole (Fe2O3@SiO2@PPy) ellipsoidal sandwich composite spheres as well as SiO2, SiO2/PPy, PPy hollow capsules and PPy ellipsoidal hollow capsules with movable hematite cores were successfully fabricated by hematite (α-Fe2O3) olivary particles. Monodispersed α-Fe2O3 olivary particles were firstly p…
The orthorhombic α″ martensite was formed in Ti-8 mass%Mo alloy by quenching from 1223 K. The purpose of this study was to investigate phase transformation of the α″ martensite structure by isothermal aging. In differential scanning calorimetry curve of the quenched specimen, an exothermic peak that indicated decompos…
Mixtures of methanol with increasing fractions of formic acid were used to progressively transform the morphology of polyaniline starting from nanofibers to compact conventional films. It was demonstrated that the methanol/formic acid mixture could be used as a viable solvent system for nanostructured polyaniline to a…
New ester-type banana (bent-shaped) monomers, 1,3-phenylene bis[4′-(alken-1-yloxy)-biphenyl-4-carboxylate]s Ia–Vb, with different substituent(s) on the central phenyl ring (H, CH3, Cl or NO2) and alkenyl tails in the side arms (decenyl or undecenyl) were prepared. The analogues IIIa–IVb with 4-chloro- or 4,6-dichloro-…
Scanning Kelvin probe force microscopy (SKPFM) is used to study the initial stages of atmospheric corrosion of an AlMg alloy and of physical vapor deposition (PVD) deposited 2 μm Al dots on pure Mg. The latter system is used as a model of a two-phase AlMg alloy. The influence of was studied in situ in humid air using…
We present the latest results for two RF/microwave devices and structures that we are developing at the University of Toronto, based on transmission-line NRI metamaterials. The first example is a super-resolving planar lens around 1 GHz and the second is a low-profile antenna, radiating vertical polarization, around 3…
Reaction of the lithium salt of EDT-TTF-2-(4-methyl)oxazoline with chloro-diphenylphosphine afforded the novel redox active chiral chelating ligands, EDT-TTF-phosphino-oxazolines, for which a palladium (II) dichloride complex was synthesized and structurally characterized.
The first examples of electrically switchable and photo-responsive mesophases in a novel class of bent-core azo compounds, consisting of only five aromatic rings and no imino functionality (–CHN–), are reported. The mesophases have been identified as B1, B2 and a new mesophase, Bx, on the basis of the results of polar…
A practical, clean, single step oxidative modification of polysaccharides by H(2)O(2) catalysed by water soluble iron phthalocyanine, exemplified with starch, allows quantitative preparation of a range of tailor made materials without producing any waste.
Single-crystalline La0.5Ca0.5MnO3 nanowires have been successfully prepared by a hydrothermal method at low temperature. X-Ray diffraction (XRD) results show that the La0.5Ca0.5MnO3 nanowires have an orthorhombic perovskite structure without any other impurity phase. Transmission electron microscopy (TEM) images demon…
An as-cast 30wt%Cr-2.3wt%C cast iron was destabilised in the temperature range of 900-1 100°C for times of 2-8 h, followed by air cooling to room temperature. The resultant microstructures were examined using light microscopy (LM), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Volume f…