Materials Literature
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The thermodynamics (temperature−concentration phase diagram), the crystal structure, and the morphology of systems prepared from syndiotactic polystyrene (sPS) in naphthalene, a solvent solid at room temperature, are reported. From the temperature−concentration phase diagram and from neutron diffraction investigations…
We have begun investigating thallium-containing compounds as candidate thermoelectric materials. Alkali metal chalcogenide systems have produced compounds with promising thermoelectric properties, and the chemistry of the Tl + cation is similar to that of the alkali metals. However, Tl is less electropositive and heav…
Approximately 22% of waste from the oil palm industry consists of empty fruit bunch (EFB). This type of biomass along with a vast quantity of agricultural residues can be utilized in natural fibre-based composites. Previous studies on palm kernel oil have successfully turned it into a polyurethane polyol in producing…
The electrochemistry of 16 different water-soluble porphyrins of the type [(TMpyP)M(II)]4+ (X-)4 or [(TMpyP)M(III)Cl]4+ (Cl-)4 is reported in nonaqueous media where TMpyP is the dianion of meso-tetrakis(N-methylpyridiniumyl)porphyrin and X- = Cl- or BPh4-. These studies were carried out to examine the effect of the me…
Abstract Highly porous and permeable polymers are produced by polymerisation of the continuous phase of high internal phase emulsions (HIPEs). The morphology and properties of the resulting PolyHIPE materials can be varied, allowing the materials to be optimised for a variety of applications. Void diameter is controll…
Abstract Electrochemical impedance spectroscopy (EIS) of Al‐Zn‐Mg‐Cu alloy in EXCO solution has been investigated. The results show that the impedance spectroscopy of the investigated electrode consists of two capacitive loops in the high and middle frequency domain respectively and an inductive loop in the low freque…
Abstract A series of di‐ and tetraamide derivatives of DOTA were synthesized, and their lanthanide(III) complexes were examined by multinuclear 1 H‐, 13 C‐, and 17 O‐NMR spectroscopy, and compared with literature data of similar, known complexes ( Table ). All ligands formed structures similar to the parent [Ln III (D…
We report molecular dynamics computer simulations of gold passivated nanoparticles and gold nanoparticle arrays. We investigate Au140 butane and dodecanethiol passivated clusters. In particular we analyse the effect that the metal core structure has on the interparticle forces and the self assembly of small nanopartic…
Several new liquid crystalline materials containing one, two or three chiral centres and having one or two lactate groups in the molecular core have been synthesized. Most of the materials show the blue phase, chiral nematic phase, paraelectric smectic A phase and orthogonal hexatic smectic B phase; some possess the f…
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Single crystals of a noncentrosymmetric orthorhombic pyroelectric ferrimagnet Ga 2− x Fe x O 3 with a Curie temperature within 260–345 K have been grown by the flux method. It has been found that the electrical properties of the single crystals varied over a broad range from 10 5 to 10 13 Ω cm depending on the presenc…
Cadmium sulfide and cadmium selenide/polymer nanocomposites were prepared via in-situ radical polymerization in miniemulsion. Organically capped CdE (E = S, Se) quantum dots (QDs) were used as the starting materials and ensembles of these dots were encapsulated with no need of further surface treatment. The use of two…
Dissolution and epitaxial growth on dolomite [CaMg(CO 3 ) 2 ] cleavage surfaces under well-defined aqueous solution conditions were studied in real-time by atomic force microscopy (AFM). Step-retreat speeds in undersaturated solutions were used to predict the growth speed for ordered dolomite utilizing a theoretical s…
A polycrystal plasticity model is proposed to predict the unique rolling texture of Cu/Nb nanostructured multilayers. At this length scale, the model accounts for the interface between Cu and Nb layers by computing the aggregate response of composite grains using a viscoplastic self–consistent scheme. Each composite g…
A key to obtaining an X-ray structure of the lactose permease of Escherichia coli (LacY) (Abramson, J., Smirnova, I., Kasho, V., Verner, G., Kaback, H. R., and Iwata, S. (2003) Science 301, 549-716) was the use of a mutant in which Cys154 (helix V) is replaced with Gly. LacY containing this mutation strongly favors an…
The adsorption of nitrate ions onto clay minerals has not been given much attention, possibly because clay surfaces are negatively charged. In order to increase the positive charge on the surface, sepiolite was modified in the present studies by treatment with dodecylethyldimethylammonium (DEDMA) bromide. After such m…
In this paper, the influence of magnetic shunt geometry on the transformer leakage field and short-circuit impedance is examined. The magnetic-field computation is conducted with the use of a particular hybrid finite-element method (FEM) boundary-element method (BEM) formulation, facilitating the parametric investigat…
The role of the atomic structure in the fracture processes is considered using borate, silicate, and phosphate glasses as an example. Primary attention is focused on the degree of connectivity of the atomic structure. It is shown that the degree of connectivity is a major factor responsible for the structural strength…
Amidoximated wood sawdust (Am-WS) and wood flour (Am-WF) were prepared using the same procedure as described recently for amidoximated cellulose (Am-Cell). The modified supports thus obtained were characterized by IR, TGA and DSC methods. In comparison to the untreated material, such treatment led to a considerable in…
Supramolecular liquid crystalline complexes have been obtained from binary mixtures of 3‐(4‐pyridyl)‐5‐(4‐n‐alkoxy)phenyl‐1,2,4‐oxadiazoles with benzoic acid, 4‐chlorobenzoic acid or 4‐methylbenzoic acid. Neither the oxadiazole derivatives nor the carboxylic acids are mesomorphic, but the H‐bonded complexes are. Their…