Materials Literature
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Abstract In the blended solid of merocyanine (MC) and polythiophene (PTh)/TiO2 p–n hetero-junction solar cells, a hole-transfer from the excited state of MC to the ground-state of PTh accelerated the charge separation in the depletion layer formed at the TiO2/MC+PTh interface, enhancing the photovoltaic properties. Th…
Cryogenic targets for the National Ignition Facility require uniform solid layers inside spherical capsules at temperatures ~1.5 K below the triple point of hydrogen. Uniform layers have been successfully formed near the triple point. However, upon subsequent cooling the layers degrade. We report here recent attempts…
This book on Clays and Clay Minerals is the first in a series of books that presents an objective view of the type and nature of industrial rocks and minerals in Jordan. The chapters in this book examine the diversity of clays in Jordan and summarize their origin and their mineralogical, chemical and industrial proper…
Core-shell composite nanoparticles consisting of a gold core and polypyrrole shell were prepared and stabilized with the poly(amidoamine) dendrimer. An in situ redox polymerization technique was used in which pyrrole reduced Au3+ to Au and then oxidized to polypyrrole. The presence of gold nanoparticles as a core was…
The structure formation and phase behavior of supramolecular hairy-rod polymers consisting of rodlike polymer chains with physically bonded side chains are investigated in the melt state using small-angle X-ray scattering. The supramolecules consist of poly(2,5-pyridinediyl), complexed by methanesulfonic acid to form…
We evaluated the performances of the hydrogen-loading technique to reduce the radiation-induced absorption in optical fibers in the visible part of the spectrum. A reduction factor as large as one order of magnitude can be obtained in high dose-rate regime. Based on a spectral deconvolution method, we showed that hydr…
Abstract The interaction of the {10 4} cleavage surface of calcite with Hg(CH 3 COO) 2 aqueous solutions with concentration of 5 mM Hg(II) (pH ≈3.5), was investigated using microscopic and spectroscopic techniques. In situ atomic force microscopy experiments showed that surface microtopography changes significantly as…
It is well-known that for a polar dielectric liquid exhibiting a single relaxation time, graphs of the real and imaginary parts of the permittivity against the logarithm of frequency are of the hyperbolic tangent and hyperbolic secant type, respectively. This was first predicted by Debye, but it was pointed out later…
Abstract The electrocatalytic behavior of a group of metal substituted heteropolyanions towards the oxidation of adrenaline was investigated in solution studies using both UV/vis and electrochemical techniques. Of the metal (M′) substituted Dawson phosphotungstates ([P 2 W 17 O 61 M′] n − ) examined, iron, copper and…
Nanocrystalline films of SnO 2 were deposited by liquid flow deposition (LFD), i.e., by flowing aqueous solutions of SnCl 4 ·5H 2 O and HCl over single‐crystalline silicon substrates at 80°C. The substrates were either oxidized and fully hydrolyzed (bare silicon) or oxidized, hydrolyzed, and then coated with siloxy‐an…
A light water reactor fuel analysis code FEMAXI-6 is an advanced version which has been produced by integrating the former version FEMAXI-V with numerous functional improvements and extensions. In particular, the FEMAXI-6 code has attained a complete coupled solution of thermal analysis and mechanical analysis, enabli…
The addition of nitrogen to duplex stainless steel weld metal has been achieved and the resultant weld metals have been assessed for their microstructural features and corrosion behaviour. It was found that, although autogenous welding of duplex stainless steels is not recommended, the addition of nitrogen through the…
Tunneling measurements of dI / dV , d 2 I / dV 2 , and d 3 I / dV 3 were formed along the C 3 axis (normally to layers) for Bi 2 Te 3 and Sb 2 Te 3 layered semiconductors in the temperature range 4.2< T >29 5 K. Temperature dependences of the forbidden band energy E g were obtained. The forbidden band energy in Bi 2 T…
A review is presented of chemical vapour deposition (CVD) diamond coating of silicon nitride (Si 3 N 4 ) materials. Microcrystalline and nanocrystalline diamond films were grown using microwave plasma (MPCVD) and hot filament (HFCVD) reactors, respectively. Scanning electron and atomic force microscopy, μ-Raman spectr…
Al2O3 bicrystals containing [0001] symmetric tilt grain boundaries were fabricated to investigate atomic structures at their grain-boundary cores. Σ7 and Σ21 boundaries studied here have crystallographically equivalent grain-boundary planes of although they have different Σ values. Grain-boundary structures were studi…
Polyimides are commonly used as organic passivation layers for microelectronic devices due to their unique combination of low dielectric constant, high thermal stability, and excellent mechanical properties. Polyimides are well known to have poor adhesion to epoxy resins. Many surface treatment methods have been devel…
We present ab initio calculations of phonons in single-wall boron-nitride (BN) nanotubes. Raman and infrared (IR) active modes of isolated and infinitely long tubes are evaluated according to the nonsymmorphic rod groups of BN nanotubes. For tubes of finite length, the selection rules are less restrictive and give ris…
This investigation focuses on the study of the dissolution by annealing of carbides present in thin walled ductile iron parts. Ledeburitic carbides are usually present in the microstructure as a consequence of the rapid solidification rate induced by the small thickness. The dissolution treatment is carried out by ann…
Thermodynamic information is critical for the assessment of the reactivity and stability of materials. New procedures have recently been developed that provide straightforward predictive methods for estimating lattice energy and standard entropy of conventional salts. These procedures also open up new possibilities fo…
This paper presents a new technique for detection and localization of partial discharges (PD) in large rotating machines. In this technique, denoted "InTech", a stator winding with (n) coils is equipped with (n + 1) inductive sensors; as a result, every stator coil is situated between two sensors. The measurement is t…