Materials Literature
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Abstract In semiconductor particles of nanometer size, a gradual transition from solid‐state to molecular structure occurs as the particle size decreases. Consequently, a splitting of the energy bands into discrete, quantized levels occurs. Particles that exhibit these quantization effects are often called “Q‐particle…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOrganic photoconductive materials: recent trends and developmentsKock Yee. LawCite this: Chem. Rev. 1993, 93, 1, 449–486Publication Date (Print):January 1, 1993Publication History Published online1 May 2002Published inissue 1 January 1993https://pubs.acs.org/doi/10.1021/cr00…
For upper-level undergraduate engineering courses in Mechanical Behavior of Materials. Mechanical Behavior of Materials, 4/e introduces the spectrum of mechanical behavior of materials, emphasizing practical engineering methods for testing structural materials to obtain their properties, and predicting their strength…
A set of 61 ion polarizabilities has been derived from the dielectric constants of 129 oxides and 25 fluorides using a least squares refinement technique in conjunction with the Clausius–Mosotti equation. These polarizabilities can be used to estimate mean dielectric constants of ‘‘well-behaved’’ compounds. They shoul…
As the study of cooperative breeding systems expands, a number of key species form the examples that underpin our general understanding. The ostrich is increasingly becoming such a textbook species, on the basis of the results obtained in Brian Bertram's study of vigilance and egg discrimination in this extraordinary…
A comprehensive coverage of organic superconductors, this guide details the synthesis, structure, conductivity, superconductivity and theoretical concepts of the subject. The book is intended for chemists, physicists and material scientists.
We describe a new method for removing thin, large area sheets of diamond from bulk or homoepitaxial diamond crystals. This method consists of an ion implantation step, followed by a selective etching procedure. High energy (4–5 MeV) implantation of carbon or oxygen ions creates a well-defined layer of damaged diamond…
Light scattering is used to measure the dynamics of the repetitive collapse of a sonoluminescing bubble of gas trapped in water. It is found that the surface of the bubble is collapsing with a supersonic velocity at about the time of light emission which in turn precedes the minimum bubble radius by about 0.03% of the…
Abstract Proton spin–spin relaxation time measurements have been performed at 300 and 400 MHz on bound rubber‐filler mixes resulting from the solvent extraction of silica‐filled and silicafilled‐modified polybutadiene, on the one hand, and of carbon black‐filled and carbon blackfilled‐modified styrene butadiene rubber…
Abstract To enhance polyimide‐to‐polyimide adhesion, we have investigated the effect of surface modification in water vapor plasma. The use of a water vapor plasma to treat a fully cured polyimide (PMDA–ODA) surface before subsequent layers of polyimide are applied results in dramatically enhanced interfacial adhesion…
The FT-IR spectrum of the FBrCO molecule has been recorded and assigned. Ab initio calculations at the second order Møller-Plesset (MP2) level of theory have been performed to calculate the harmonic frequencies of the fundamentals as well as the molecular parameters of this molecule. The theoretical calculations have…
The luminescence properties of Eu3+-activated disilicates (Y, Tb)2Si2O7 are strongly influenced by their crystal structure. Within the region of type C in cathodoluminescence an energy transfer from the hole trap Tb3+ to the electron trap Eu3+ is working due to the crystallographic equivalence of the Ln3+ surroundings…
During impulse excitation of mechanoluminescence (ML) in X- or γ-irradiated alkali halide crystals, two peaks are observed in the ML intensity versus time curves. The first peak lies in the deformation region and the second peak in the post-deformation region. The ML in the deformation region is due to the recombinati…
The influence of external conditions on the characteristics of long-period structures (LPS) is considered: the temperature influence on the stabilization of the ordered structure with periodic antiphase boundaries is taken as an example. The study is carried out in terms of the phenomenological model which associates…
MoTe2 layers are obtained by solid state reactions – induced by annealing – between the Mo and Te constituents in the form of thin films, sequentially deposited (Mo/Te/…/Mo). The films are investigated by X-ray diffraction analysis, scanning and transmission electron microscopy (SEM, TEM), photoelectron spectroscopy (…
The temperature dependence of strain rate sensitivity is investigated superimposing an ultrasonic oscillatory stress during the plastic deformation of KCl single crystals doped with monovalent impurities, Br− and I−. The effective stress due to monovalent weak obstacles which lie on the mobile dislocation with largest…
Interplanar and intraplanar spacings as well as the elastic constants of fcc/fcc metallic multilayers stacked along [001] were determined via variable-cell molecular-dynamics simulation in (HtN) and (EhN) ensembles at room temperature. Qualitative differences in the structural and elastic properties of the multilayers…
The successive cubic-tetragonal-orthorhombic-rhombohedral phase transitions in BaTiO 3 are discussed quantitatively from the microscopic free energy based upon the mean field approximation, where the Ti ions shift in the lattice having the spontaneous deformation. It is shown that the effect of the spontaneous lattice…
Infrared absorption in composite films of ${\mathrm{SiO}}_{2}$ and microcrystalline Ge has been investigated with p- and s-polarized light under 45\ifmmode^\circ\else\textdegree\fi{} oblique incidence. In the case of p-polarized incident light, pure ${\mathrm{SiO}}_{2}$ films clearly exhibit an absorption peak of the…
We have investigated the structure of molecular-beam-epitaxy-grown CuO thin films on MgO substrates using reflection high-energy electron diffraction, x-ray diffraction, and high-resolution electron microscopy (HREM). The results show that CuO(111) planes grow parallel to (001)MgO planes. Three main in-plane epitaxial…