Materials Literature
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Calcium titanate (CaTiO3) films were prepared by metal-organic chemical vapor deposition (MOCVD) using Ca(dpm)2 and Ti(O-i-Pr)2(dpm)2 precursors. The phases, composition and morphology of Ca-Ti-O system films changed depending on molar ratio of Ca to Ti (RCa/Ti), total pressure (Ptot) and substrate temperature (Tsub).…
Proceedings of the 8th International Coastal Symposium, ICS 2004, Itajai/Itapema, Santa Catarina, Brazil, 14 to 19 March 2004
We have investigated a low-temperature growth process for vertically aligned carbon nanotubes on a normal glass plate, which is applicable to the preparation of large field emission devices. This process involves the preheating of a carbon source gas and the use of binary catalysts. Three binary catalysts, Fe/Al, Fe/T…
Quality is a very important notion, which depends on every person’s taste, on the conditions of use, and the requirement degree of every consumer. The global quality of the knit is a multicriteria phenomenon that requires the satisfaction of several properties at the same time; among these properties are the propertie…
Simple relationships between the absolute proton affinities APAs and second order hyperpolarizabilities γ is found for a class of condensed aromatic molecules with the conjugated π-electron network. Results are presented for “open” acenes and zethrenes in comparison with “closed” systems (coronene and kekulene). They…
We investigated experimentally and theoretically the switching behavior of the bistable chiral splay nematic liquid crystal (BCSN LC) device with a vertical field. We observed optical bouncing during a relaxation process. We found that the origin of this optical bouncing could be distinguished from those of the twiste…
The action of atmospheric pressure air glow discharge with aqueous electrolyte cathode onto surface of polyethylene (PE), polypropylene (PP) films and grey cotton fabric has been investigated. Distilled water and KC1 aqueous solutions were utilized as a discharge cathode. Polymer samples were placed in the liquid 2 mm…
A construct based on the electrostatic layer-by-layer self assembly technique has been fabricated, to be used as a tailored device to encourage nerve regeneration. A multilayered nanocoating composed of three precursor bilayers of cationic poly(dimethyldiallylammonium) chloride (PDDA) and anionic poly(styrenesulfonate…
Results of shock‐wave experiments with iron single crystals, ultra‐fine grain and as‐received Armco‐iron, at load durations of ∼20 ns to 200 ns are presented. No evidence of the expected formation of rarefaction shock waves, as predicted by the ab initio calculations, was observed in the range of attained tensile stre…
The modifications and extensions of standard continuum models used for a description of material transport due to electromigration with models for the copper microstucture are studied. Copper grain boundaries and interfaces are modeled as a network of high diffusivity paths. Additionally, grain boundaries act as sites…
The circuit architecture and capabilities of a new medium sized cavitation tunnel being developed at the Australian Maritime College is described.
X-ray photoelectron spectroscopy (XPS) was used to determine the composition and chemical structure of epitaxial LaNiO3-x films obtained by a reactive dc magnetron sputtering. It was found that, in contrast to the samples synthesized by using solid state chemical reactions, the surface Ni/La concentrations ratio is cl…
Melt-crystallization behavior of poly(L-lactide)(PLLA) synthesized by Zn metal was investigated by using DSC,WAXD and POM.The crystallization behavior from the melt was investigated in the range from 368 to 398 K.The thicknesses of lamellae was(14±1) nm,and the thickening effect was not obvious.The results were treate…
Impact experiments of man-made rock with different porosities were carried out with Split Hopkinson Pressure Bar (SHPB). The characteristic of energy dissipation and the influence of rock porosity on energy dissipation were investigated during the impact process. Meanwhile, the relation between the energy dissipation…
When the design of a medical device and its intended use as a chronic implant require that the prostheses maintain some minimum level of physical, chemical and biological integrity after implantation in living tissue for some time interval, the materials of which the prosthesis is made should be tasted either individu…
A kaolinit metakaolinitt trtn talakulsnak folyamata mind a mai napig szmos krdst vet fel annak ellenre, hogy maga a dehidratcis folyamat ltszlag kellen ismert s feltrt. A szerzk munkjukban ismertetik a kaolinitsvny kmiai sszettelt, kristlyszerkezeti felptst, a rcspontok tvolsgt s szgeit
Polyelectrolyte multilayer (PEM) thin films were deposited on silk by sequential deposition of Chitosan and polyphosphoric acid. This PEM composition takes advantage of synergetic effect of the phosphorus and the nitrogen to provide an efficient coating, which prevents fiber decomposition at high temperature. Prior to…
In this article, we report on the synthesis and characterization of porous platinum layers on top of highly doped (0.007–0.02 and 0.001 – 0.003 Ω cm ) n-type porous silicon by immersion plating. Porous silicon samples of different morphologies were prepared by electrochemical etching. Plating was performed by simple i…
It was shown that water-insoluble porphyrins solubilized with pluronics (ternary block copolymers of ethylene oxide and propylene oxide) efficiently transfer photoexcitation energy to molecular oxygen dissolved in aqueous media to excite it into the singlet state, which is active in oxidizing organic substrates. It wa…
The pyroelectric, elastic, and electrostrictive properties of lead magnesium niobate-and barium titanate-based solid solutions were studied under a dc electric field near a phase transition. The results obtained for a relaxor transition (in a lead magnesium scandium niobate solid solution) are compared with those deri…