Materials Literature
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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…
Abstract Twist extrusion is a recently developed method of severe plastic deformation that principally uses torsion to generate high strains in a repeatedly extruded billet, while maintaining a constant cross-section. The method thus results in a deformation gradient across the billet section. To date, the grain refin…
Thin film nitinol and single crystal Ni-Mn-Ga represent two new shape memory materials with potential to be used as percutaneously placed implant devices. However, the biocompatibility of these materials has not been adequately assessed. Immersion tests were conducted on both thin film nitinol and single crystal Ni-Mn…
The fluorescence spectra of unsubstituted porphyrin (H2P), diprotonated porphyrin (H4P2+), and isoelectronic tetraoxaporphyrin dication (TOxP2+) have been measured in solution at room temperature. The S2-->S0 fluorescence has been observed, much more intense for TOxP2+ than for H4P2+ and H2P. In the TOxP2+ case, the S…
Abstract Carbon micro-coils (CMCs) with 3D-helical/spiral structures and coil diameters on the order of micrometer were obtained by metal-catalyzed pyrolysis of acetylene at 700–800 °C. The preparation conditions, morphology, growth mechanism, microstructure, and some properties of the CMCs were examined in detail. Tw…
The simple stirring of phenol with an oxidant in water provided a novel green way to synthesize soluble polyphenol. The soluble polyphenol obtained had a high poly(phenylene oxide) unit ratio, poly(phenyleneoxide)/poly(phenylene)=ca. 80/20. Additionally, the insoluble fraction was identified as a poly(phenyleneoxide),…
Magnesium iron hydrosilicate nanotubes with a chrysotile ((Mg,Fe) 3 Si 2 O 5 (OH) 4 ) structure have been synthesized hydrothermally at t = 250–450°C and p = 30–100 MPa. In the hydrothermal synthesis of (Mg,Fe) 3 Si 2 O 5 (OH) 4 chrysotile, part of the Fe 2+ ions oxidize to Fe 3+ and are incorporated into the octahedr…
[structure: see text]. A novel, rapid, inexpensive, and highly efficient divergent approach for the synthesis of a 32-amine-terminated G4 polyamide dendrimer has been developed. Each generation dendrimer was successfully obtained by the condensation of the preceding generation dendrimer with the building block and the…