Materials Literature
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The continuing increase of functionality and miniaturization in handheld electronics has resulted in a decrease in the size and weight of the product. Therefore, internal structures such as printed wiring boards (PWBs) are becoming more slender, thus increasing the likelihood of unintentionally causing contact between…
The basic components of spintronic devices are spin polarized ferromagnets and spin transporting non-magnetic spacers. Exploiting carbon-based materials for these components promises to extend functionality of information storage and processing as well as to improve device integration and fabrication. Here we present…
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The electro-mechanical coupling and resonance characteristics of a piezoelectric modulated thin film bulk acoustic wave resonator (PMBAR) is described quantitatively. The derived 1-D analytical model is in agreement with 2-D finite element modeling (FEM). The modeling shows that a pure shear mode excitation can be ach…
We fabricated a modulated stacked quantum dot (QD) structure to investigate energy transfer among QDs using a strain compensation technique that allowed us to fabricate a vertically aligned, highly stacked structure without any degradation in crystal quality. Enhanced photoluminescence (PL) intensity for the ground st…
ABSTRACT Purpose This study investigated the effect of two welding methods on the mechanical properties of a cobalt-chromium (Co-Cr) alloy for metal base framework. Materials and methods Fifty-four plates were cast for TIG and laser welding. Cobalt-chromium for plates were prepared and divided into three groups of 18…
ZnO nanofibers are synthesized by an electrospinning method and characterized by x-ray diffraction (XRD) and scanning electron microscopy (SEM). Two types of gas sensors are fabricated by loading these nanofibers as the sensing materials and their performances are investigated in detail. Compared with the sensors base…
Deposition of silica and silicate-based foulants in industrial water systems is a difficult challenge for water technologists because of the limited solubility of both amorphous (polymerized) silica and metal silicates. Once formed, silica scale is extremely difficult to remove. This article describes the influence of…
The porous hydroxyapatite (HA) bioceramics were prepared through combination of sacrificial template and direct foaming techniques using PMMA granules (varied from 5 to 50wt% in content) as a template and H 2 O 2 solution (varied from 5 to 30wt% in concentration) as a foaming agent, respectively. The effects of PMMA c…
The effect of finely dispersed silica on the structure and mechanical and tribological characteristics of polytetrafluoroethylene-silica composites is studied. It is shown that the introduction of a small amount of filler (0.5%) results in qualitative and quantitative changes in the supermolecular structure of the pol…
In this study isatin and its novel Schiff base as a new red fluorescent material for organic light emitting diodes (OLEDs) are used for red color OLEDs. We fabricated OLEDs with the configuration of indium tin oxide/4.4′-Bis(N-carbazolyl-1,1′-biphenyl/red emitter/HGH2/Alq3/Li/Al which the electrical and optical proper…
Whitening of the emission of electroluminescent (EL) devices was performed by doping α-sexithiophene (6T), which is an orange emitting dye, into blue emitting oriented poly(9,9-dioctylfluorene) (PFO) polymer films. These oriented PFO films were produced by means of the friction transfer method and the doping of 6T was…
Curing effects and difference in thermal contraction of components cause residual stresses and warpage during encapsulation of electronic packages. Residual stresses combined with thermal and mechanical loads influence package reliability and performance and may eventually lead to product failure. Comprehensive materi…
Ultrafine mesoporous tungsten carbide (WC) was prepared from as-synthesized mesoporous WC using high-energy ball milling treatment. X-ray diffraction (XRD), scanning electron microscopy (SEM), and nitrogen adsorption-desorption techniques were used to characterize the samples. Brunauer-Emmett-Teller (BET) surface area…
Line-edge and linewidth roughness (LER and LWR) is mostly characterized using the edge position data obtained by detecting edges in scanning electron microscope (SEM) images. In order to reduce data errors caused by SEM-image noise, image pixels are usually averaged along or across pattern edges (longitudinal or cross…
Transport of energetic ions due to sawteeth, Alfvén eigenmodes and microturbulence, Pace, D.C., Fisher, R.K., García-Muñoz, M., Heidbrink, W.W., McKee, G.R., Murakami, M., Muscatello, C.M., Nazikian, R., Park, J.M., Petty, C.C., Rhodes, T.L., Staebler, G.M., Van Zeeland, M.A., Waltz, R.E., White, R.B., Yu, J.H., Zhang…
L10 FePt film exhibits a very large magnetocrystalline anisotropy (7×107 ergs/cc). It therefore becomes a promising material candidate for ultrahigh areal density heat assisted magnetic recording media. This paper discusses the effect of pressure on the microstructure and magnetic properties of L10 FePt:X thin films.…
An elaborately designed bilayer consisting of superconducting YBa2Cu3O7−δ (YBCO) and ferromagnetic La0.67Sr0.33MnO3−δ (LSMO) was prepared on a single crystal LaAlO3 substrate by pulsed laser deposition (PLD), with a view to understanding the mechanism behind the influence of superconductor/ferromagnet proximity on the…
Tokamak plasmas can be sensitive to external non-axisymmetric magnetic perturbations that are several orders of magnitude smaller than the axisymmetric field. These perturbations, which are usually undesired and are referred to as error fields, can limit operation by braking the plasma rotation until an instability su…
The microstructure, optical property and magnetism of nitrogen ion implanted single MgO crystals are studied. A parallel investigation is also performed in an iron ion implanted single MgO sample as a reference. Large structural, optical and magnetic differences are obtained between the nitrogen and iron implanted sam…