Materials Literature
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Thin films of Au were made by sputter deposition onto glass substrates with and without transparent and electrically conducting layers of SnO2:In. The Au films were up to ~11 nm in thickness and covered the range for thin film growth from discrete islands, via large scale coalescence and formation of a meandering cond…
The potentialities of ceramic coatings as a protective layer have been discussed by the comparison of the oxidation kinetics between coated and uncoated SiC-based materials. It was observed that a thermally sprayed coating of titanium dioxide (TiO2), in the same conditions of oxidation, decreases the kinetics constant…
The sensing of protein adsorption by silver nanoparticles/hydroxyapatite composites was investigated using a phosphate buffer solution containing bovine serum albumin (BSA) or lysozyme (LSZ). The adsorption of BSA and LSZ on the composites prepared without using trisodium citrate was similar to plain hydroxyapatite, w…
A spatially resolved cathodoluminescence (CL) analysis is used as a means for chemical and mechanical analyses of the composite surface after environmental exposure. CL emission proves extremely efficient in concurrently monitoring the concentration of point defects (e.g., oxygen vacancies) on the material surface. Us…
In the frame of a wide research program devoted to the matter recovery from waste by means of thermal processes, particular efforts have been put into the study of biomasses and waste residue of peculiar composition, which could be used as precursors of ceramic materials. Rice shells are waste biomasses coming from th…
Due to the lack of specialty kinetic methods and instruments, the kinetics of fast hightemperature reactions SHS-ceramic systems has not been adequately studied. Recently, we have developed a number of methods of so-called non-isothermal kinetics (NIK) and designed instruments allowing one to obtain information about…
We report on photoemission studies of SrTiO3, Pr0.55(Ca1-ySry)0.45MnO3 (PCSMO, y=0.25,0.40), and Ti1-xCoxO2-δ (x=0.05, 0.10) under laser illumination and discuss the origins of the unusual electronic structure changes induced by optical excitation at the surfaces of these transition-metal oxides. The present study sho…
In Ba ferrite particles magnetocrystalline and shape anisotropies are contemporarily present and conflicting. The strength and evolution of the two anisotropies are studied, through the dependence of the anisotropy constants on temperature. While in pure Ba ferrite particles the anisotropy is uniaxial at all temperatu…
The technique of aorta-coronary shunting offered by Dr. M. Soutorine by means of the original stapler developed by "Endogene" allows suturing blood vessels by superelastic Тi-Ni staples on «working heart» (without heart switching-off). The material for staples is a 0.30 and 0.315 mm diam. wire which was studied by DSC…
In this paper, we present a concise summary of selected results from our recent and ongoing studies on transformation electromagnetics. Specifically, we focus on cloak/anti-cloak interactions (with possible application to sensor invisibility), and on some general classes of metamaterial slabs (made of double positive,…
Hydrothermal surface modifications of the titanium specimens were performed (i) at 200 °C under 1.5 MPa pressure, and (ii) at 230 °C under 2.5 MPa pressure. To see the effect of an ion implantation, two different aqueous hydrothermal environments were selected: (i) de-ionized water and (ii) calcium containing de-ioniz…
Within unified stereological approach the silicon carbide-based ceramics SiSiC , SSiC, and LPSiC are treated as binary compositions, that despite certain structure ordering differences might be similarly described as comprising topologically continuous component (that provides the high level of physical and mechanical…
Le domaine de l'électronique de puissance est un domaine en pleine expansion dans les applications ferroviaires, avioniques et automobiles. Ce développement est rendu possible grâce à l'arrivée sur le marché de composants de puissance qui n'ont cessé d'évoluer afin d'augmenter leurs performances tout en réduisant leur…
This chapter contains sections titled: Mesoporous Materials: Basic Concepts Silicone Surfactants in the Preparation of Mesoporous Materials Fluorinated Surfactants in the Preparation of Mesoporous Materials Summary References
The LaAlO3/SrTiO3 (001) thin film materials system was studied using in situ, simultaneous x-ray diffuse scattering and specular reflectivity during pulsed laser deposition. Using this method, we are able to measure the time dependence of the characteristic surface length scale and the characteristic time for both in-…
North Carolina State University Theses Materials Science and Engineering.
This chapter contains sections titled: Introduction Literature Review Motivation PEM Fuel Cell Mathematical Model Reduced Order Model Concluding Remarks
In der vorliegenden Arbeit wird der Spin-Transfer-Torque-Effekt in saulenartigen ferro-/nichtferromagnetischen Schichtstrukturen untersucht. Durch ihn kann die Richtung der Magnetisierung allein mit Hilfe eines Stromes beeinflusst werden, was ublicherweise uber den Riesenmagnetowiderstands-Effekt nachgewiesen wird. In…
This chapter contains sections titled: Introduction Experimental Section Results and Discussions Conclusions Acknowledgment References
In this article we report on the properties of thin films of the full Heusler compound Co2TiSn prepared by DC magnetron co-sputtering. Fully epitaxial, stoichiometric films were obtained by deposition on MgO (001) substrates at substrate temperatures above 600°C. The films are well ordered in the L21 structure, and th…