Materials Literature
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Magnetic tunnel junctions (MTJs) with thin barriers are already used as read sensors in recording media. However, the presence of pinholes across such few A thick barriers cannot be excluded and one needs to investigate their effect on the MTJ-transport properties. By applying large electrical currents we could change…
A driving force for the growing interest in nanoassemblies is the use of nanoparticles linked to organic molecules. The goal of our research is to investigate the coupling of gold and silver nanoparticles (GNP and AgNP) with porphyrins molecules. We prepared water-soluble GNP and AgNP by reducing the noble metal compl…
In this chapter, different kinds of resonant-type metamaterial transmission lines based on subwavelength resonators have been presented and studied. There are several types of resonators which allow their use in the implementation of this kind of artificial transmission lines and their small size is exploited in order…
Deoxyribonucleic acid (DNA) is considered as one of the alternative materials for electronic device applications; however, DNA has critical limitation to electronic device applications due to its low electrical conductivity and unreliability. Therefore, it is required for electronic devices to prepare the well defined…
In this study, fatigue tests were carried out using a diecast Mg alloy AZ91 to study the distribution of fatigue lives under constant stress amplitudes. During the fatigue process of the diecast Mg alloy, cracks initiated from the casting defect existing inside of the specimen, and then propagated prior to final failu…
A comparative study of the activities of the enzymes of carbon metabolism from the cells of moderately thermophilic chemolithotrophic bacteria Sulfobacillus sibiricus (strains N1 and SSO) and Sulfobacillus thermosulfidooxidans subsp. asporogenes (strain 41) was carried out grown in a high layer of medium without force…
Cadmium oxide (CdO) quantum dots were synthesized in the laboratory by quenching method using CdO powder sintered at 9000C and ethyl alcohol kept at ice cold temperature. X-ray diffraction investigations reveal the NaCl cubic structure of CdO quantum dots. Addition of ethylenediamine to a portion of reaction mixture c…
Three old specimens, collected in the 19 th century and now deposited in Fersman Mineralogical Museum, Moscow, are labeled as rhodizite from the Sarapulka, Shaitanka (both cotype localities) and Alabashka granitic pegmatite fields, Central Urals, Russia. All are Cs-dominant (Cs > K) and must now be considered londonit…
A hydrothermal route for preparing large size xonotlite fibers without special instruments and synthesis conditions was development. Effect of pH values in system on the crystal phase and morphology of synthesized xonotlite fibers was studied by using XRD and SEM. The results indicated that the different pH systems ha…
Exposure of Type 316 stainless steel to tritium-containing hydrogen at an elevated temperature causes diffusion of the majority into the bulk and trapping of a small fraction in a thin oxide layer on the surface at concentrations far exceeding those in the bulk. The uptake by the bulk and surface layer is temperature…
Polycrystalline metallic materials are made of an aggregate of grains more or less well-oriented, with respect to the loading axis, for plastic gliding. Under mechanical loading, this leads to a heterogeneous deformation at the microstructure scale. This local plasticity, linked to fatigue damage, triggers a heterogen…
A full room-temperature-fabricated ZnO-based thin-film transistor (TFT) has been demonstrated in this study using a gate dielectric of gadolinium oxide (Gd 2 O 3 ) thin films. This is the first report on the use of Gd 2 O 3 films as the gate insulator for a metal-oxide-based TFT. The properties of ZnO and Gd 2 O 3 fil…
Hides and Skins are protein based materials containing high amounts of water, which makes them a nutritionally rich media ideal for bacterial growth. Being also the essential raw materials in leather manufacture, it is vital to carefully protect them against bacterial action especially in the early wet processing stag…
Mechanically rubbing polyimide thin film is a simple process. It, however, imposes some interesting surface phenomena. Mechanical rubbing breaks the two-dimensional topographical uniformity of the polyimide surface and causes changes in the surface energy of the polyimide thin films. The wettability of rubbed polyimid…
The A1, O, AlO, A12O, Al2O2, WO2, and WO3, partial pressures in the vapor over Al2O3 in a tungsten Knudsen effusion cell between 2300 and 2600 K were derived from A1+, O+, AlO+, A12O+, Al2O 2 + , WO 2 + , and WO 3 + , ion intensities. The mass spectrometer was calibrated against the equilibrium constant of the WO3(g)…
A series of “H-shaped" organic dimers (azobenzene derivatives) exhibit linear absorption red shift compared with their corresponding monomers experimentally. Dipolar interaction model is not appropriate for the azobenzene derivatives due to the small distance between two “D-π-A" chains. Energy transfer model is sugges…
We investigated the effects of catalyst (Fe)/buffer layer (Al2O3) on the vertical growth multiwalled carbon nanotubes (CNTs) synthesized by thermal chemical vapor deposition. The Fe was deposited onto Al2O3/SiO2/Si wafer by using e-beam evaporator. Ethylene was used as a feeding gas while argon was used as a carrier g…
Data obtained from laboratory incremental loading (IL) oedometer tests are evaluated to study the consolidation strain rate behaviors of saturated clay. Soil consolidation is a time-dependent volume change (compression) process induced by both dissipation of excess pore water pressure and reorientation of mineral grai…
In this paper, we review on classes of materials that can be used as hard templates to fabricate nanostructured thin film materials. The hard templates discussed are anodized aluminum oxide (AAO), block copolymer (BC) self-assembly films, and mesoporous thin films (MTFs), with emphasis on MTFs since it has not been re…
Metamaterials are artificially designed materials having electromagnetic properties which are not generally found in nature. Various resonators exhibiting metamaterial characteristics are split ring resonator (SRR), spiral resonator (SR), omega and fractal resonator. This paper presents a new type of resonator called…