Materials Literature
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A selective two-step doping method was developed to prepare metallic Ti-doped NaAlH 4, in which a catalytic amount of metallic Ti was first milled with NaH and then milled again after adding Al powder (NaH:Al=1:1). As determined by the combined X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and scann…
The bacterial reaction center (RC), a membrane photosynthetic protein, has been adsorbed onto a glass surface by alternating deposition with the cationic polymer poly(dimethyldiallylammonium chloride) (PDDA) obtaining as an end result an ordinate polyelectrolyte multilayer (PEM) where the protein retains its integrity…
Magnetic and magnetotransport properties of GaAs(δ〈Mn〉)/In 0.17 Ga 0.83 As/GaAs quantum wells with different Mn concentrations are studied. The delta-doped manganese layer has been separated from the GaAs quantum well with a spacer with an optimal thickness (3 nm), which has provided a sufficiently high hole mobility…
From recent research work, it has been found that the ZnO nanostructures have good field-emission performance. This article compares the emission characteristics of ZnO nanopins (such as I-V curve, thermal stability, and aging process) with those of carbon nanotubes. From this comparison, it can be seen that the emiss…
In this paper, new artificial magnetic materials based on fractal Hilbert curves are proposed, modeled and numerically analyzed. It is shown that using fractal structures as inclusion in the design of artificial magnetic materials allows miniaturization of the unit cell size, thus enabling design of miniaturized devic…
Carbon Nanotubes (CN) form a new class of materials that has attracted large interest in the scientific community because of their extraordinary properties (mechanical, electrical, thermal, etc.), as well as owing to the diversity of the proposed technological applications. The characterization of CN is the result of…
Abstract: We introduce and investigate nu-merically a thermodynamically consistent simple model of a drop or vesicle in which the interfa-cial surface contains multiple constitutive compo-nents (e.g. amphiphilic molecules). The model describes the nonlinear coupling among the flow, drop/vesicle morphology and the evol…
The success of innovative fouling mitigation techniques such as ion implantation depends upon the early stage of scale formation on the heat transfer surface. This is because the first crystalline nuclei that appear on the surface during the initial period dictate how fouling would develop in latter stages. In this st…
This paper reports studies of the exchange interaction between the conventional ferromagnets CoFe2O4 and permalloy and the multiferroic antiferromagnet BiFeO3 films. Bilayer films were grown which demonstrated significant exchange bias at room temperature. BiFeO3 films grown under the same conditions also showed a lar…
Abstract Radiation effects on sapphire optical fibers were investigated using off‐line gamma‐ray, neutron and electron beam irradiation and on‐line proton irradiation. The optical attenuation of these optical fibers was studied from UV to IR (200 nm – 1700 nm). For the in‐situ measurements radioluminescence was also i…
Angle-resolved photoemission measurements are carried out to investigate the valence electronic structure of Cu on ZnO(101̄0). The coverage-dependent measurements of the Cu 3d and 4sp bands reveal that the growth of the Cu overlayer is characterized by a cluster formation. These Cu clusters are semiconductors with an…
To make the specific feature of nanocrystalline silicon (nc-Si) cold cathode clear, its emission characteristics are investigated in various atmospheric gas ambiences. The experimental nc-Si diode is composed of a top thin Au film, a nanocrystallized polysilicon layer, an n+-type silicon wafer, and a back contact. Und…
Hexagonal YMnO3 and HoMnO3 as well as (YMnO3/HoMnO3)15 superlattices were grown on (111) ZrO2 (Y2O3) and (111) Pt/TiO2/SiO2/p-type (100)Si substrates. Epitaxial stabilization was used on the same substrates to grow DyMnO3 or TbMnO3 (which normally crystallize in an orthorhombic, perovskite-type, structure). All hetero…
Two different types of zeolitic materials were structured in core−shell composites possessing a large core (BEA-type) and a thin shell (MFI-type). The core structure comprised a hierarchical porous organization where the access to the zeolite micropores was enabled by macro- and mesopores. This structure was prepared…
The aim of this study was to investigate the effect of 6 wk of whole body vibration (WBV) training on sprint running kinematics and explosive strength performance. Twenty-four volunteers (12 women and 12 men) participated in the study and were randomised (n = 12) into the experimental and control groups. The WBV group…
Mechanical and thermal comfort aspects of fabrics produced from some non-conventional blends and light weight constructions have been examined. Single yarn woven worsted suiting fabrics show better physical as well as physiological comfort-related properties. Among various natural fibre based worsted suiting fabrics,…
Abstract Polyaniline is a model molecular system in the study of conductive polymers. Ionic liquids, on the other hand, are becoming more and more a very convenient alternative for conventional organic solvents. The dissolution of polyaniline‐emeraldine base (PANI‐EB) in imidazolium ILs leads to its doping, as indicat…
Vitreous is transparent tissue located between the lens and the retina of the eye, thus, difficult to look at by even ophthalmological microscope. But vitreous is connected with some sight-threatening eye diseases, for example, retinal detachment, macular hole, epi-retinal membrane, and so forth. Quantum dots (QDs) ha…
By using Radio Frequency (RF)magnetron sputtering method, Pb(Zr 0.5 Ti 0.5 )O 3 (PZT)thin films were deposited on Pt/Ti/SiO 2 /Si substrates. Pt/Ti bottom electrode was fabricated on SiO 2 /Si substrates by magnetron dual-facing-target sputtering system. Phase and crystalline structure analyses of the PZT films were p…
Abstract The processes of the creation, stabilization and annealing of anion Frenkel defects have been investigated in MgO and MgO:Be single crystals irradiated by α particles, uranium swift ions or fast neutrons at 300 K and also additionally irradiated by 5 keV electrons at 6 K. Neutral oxygen interstitials undergo…