Materials Literature
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Aurivillius-type structure ceramics are considered to be good candidates for use as high-temperature piezoelectrics. To this aim, it is essential to know the resonance characteristics in the working temperature range, rather than at room temperature. In this paper, an automatic iterative procedure has been used to cha…
Geometrical optimizations and electronic structural analyses of the -O(2)B(2)- bridged hydrometal complexes (M(4)H(3)C)(2)B(2)O(2) and (M(4)H(3)N)(2)B(2)O(2)(2+) (M = Ni, Mg) containing double tetracoordinate planar nonmetals (TPN) have been performed using the density functional theory at the B3LYP/6-311+G(d,p) level…
An intermolecular potential is introduced for the study of molecular mesogenic fluids. The model combines distinct features of the well-known Gay-Berne and Kihara potentials by incorporating dispersive interactions dependent on the relative pair orientation to a spherocylinder molecular core. Results of a Monte Carlo…
We demonstrate an approach for producing an array of nanopores on a silicon surface. The methods used combine nonlithographic pattern transfer and chlorine plasma etching to produce ∼60nm diam holes up to 1μm in depth. The near-normal specular optical reflectance of these systematically modified surfaces is found to d…
We present the design, fabrication, and electro-optical properties of a switchable Penrose quasicrystal configuration in holographic polymer dispersed liquid crystal (H-PDLC) materials using a 5-beam hololithography exposure technique. The Penrose quasicrystal structure is confirmed through diffraction patterns and sc…
The thermodynamic behaviour of water seems to be related to static heterogeneities. These static heterogeneities are related to the local structure of water molecules and, when properly characterized, may offer an economical explanation of thermodynamic data. 'What matters' most in determining some of the unusual prop…
In phosphor, blue luminescence is observed from on the two different strontium sites present in the lattice. The concentration quenching processes of the two inequivalent ions are determined respectively, and the corresponding concentration quenching mechanism is verified as dipole-dipole interaction. The critical tra…
Supercooled liquids in the Y(2)O(3)-Al(2)O(3) system undergo a liquid-liquid phase transition between a high-temperature, high-density amorphous (HDA) polymorph form and one with lower density (LDA form) that is stable at lower temperature. The two amorphous polymorphs have the same chemical composition, but they diff…
A method is reported for the fabrication of Fe-Pt binary alloy nanowire arrays embedded in porous alumina films with controlled diameters and high aspect ratios directly on glass substrates by successive anodization and cathodic electrodeposition in a novel bath with a simple composition. Porous alumina films with dif…
The ionic liquid, 1-butyl-3-methylimidazolium hexafluorophosphate, was used to deposit adherent and highly conducting polypyrrole coatings at pure iron using a simple potentiostatic technique. Adherent and highly conducting polypyrrole films were formed at the iron substrate using potentials in the range from 1.0 to 1…
This paper presents a fundamental study of the influence of various chemical inhibitors on the corrosion rate of mild steel in brine electrolyte under carbon dioxide conditions. The corrosion inhibitors were fitted to a Temkin adsorption isotherm, and various fundamental constants of adsorption i.e., adsorption equili…
Abstract The single crystal trigonal selenium nanoplates have been prepared directly from the trigonal selenium nanoparticles in a simple way with ethylenediamine in existence. The as-prepared nanoplates were characterized by XRD, TEM, HRTEM, SEM, and SAED measurements. It is shown that the selenium nanoplates have a…
We investigated second order optical nonlinearity of zinc oxide thin films, grown on glass substrates by the dual ion beam sputtering technique under different deposition conditions. Linear optical characterization of the films was carried out by spectrophotometric optical transmittance and reflectance measurements, g…
A polycrystalline chemical vapor deposited (CVD) diamond detector was installed on a JET tokamak in order to monitor the time dependent 14MeV neutron emission produced by D–T plasma pulses during the Trace Tritium Experiment (TTE) performed in October 2003. This was the first tentative ever attempted to use a CVD diam…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTOne-Step Exfoliation of Montmorillonite via Phase Inversion of Amphiphilic Copolymer EmulsionChih-Cheng Chou and Jiang-Jen LinView Author Information Department of Chemical Engineering, National Chung Hsing University, Taichung 402,…
Phase transitions from and to the quasicrystalline state show a typical signature due to some structural peculiarities. Both quasicrystals and most of their translationally periodic transformation products, the approximants, consist of the same basic structural units ('clusters'). This is the cause of low-energy inter…
Novel monolithic catalyst supports with regular three-dimensional structure and channel-to-channel interconnectivity have been fabricated using a direct ceramic fabrication technique known as “robocasting”. Using the oxidation of CO over a Pt/γ−Al 2 O 3 catalyst as a probe reaction, we have quantified the mass transfe…
Titania (TiO2) nanoparticles with primary diameters of less than 30 nm were produced by the thermal decomposition of TTIP and by the oxidation of TiCl4 in a cylindrical furnace reactor at 1200°C. Particle size, crystalline phase, and phase transformation were investigated as a function of precursor concentration and t…
Organosilicon films (Si:O:C:H) have the potential to replace as a lower dielectric constant microelectronic interconnection layer. The structure of Si:O:C:H films was characterized by and solid-state nuclear magnetic resonance (NMR) and also by X-ray photoelectron and Fourier transform infrared spectroscopies. Spin-co…
To develop the capability to create diamond electrodes with greater functionality, covalent modification was carried out on homoepitaxial single-crystal diamond electrode surfaces. (100) and (111) single-crystal boron-doped diamond electrodes were first prepared homoepitaxially, then subjected to oxidative treatments,…