Materials Literature
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Gd-Ethoxybenzyl-DTPA (Gd-EOB-DTPA) is a highly water-soluble paramagnetic contrast agent. Due to its protein binding of about 10% and its lipophilic residue, Gd-EOB-DTPA exhibits both renal (30% of the dose) and hepatobiliary (70%) excretion in rats. Despite its lipophilic character, the compound displays a low toxici…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTBond dissociation energies in DMSO related to the gas phase valuesF. G. Bordwell, Jinpei Cheng, Guo Zhen Ji, A. V. Satish, and Xianman ZhangCite this: J. Am. Chem. Soc. 1991, 113, 26, 9790–9795Publication Date (Print):December 1, 1991Publication History Published online1 May…
The magnetocrystalline anisotropy energy and anisotropy of the orbital angular momentum have been calculated from first prinicples for Co and for a variety of intermetallic compounds including ${\mathrm{YCo}}_{5}$. For all compounds the predicted easy axes are in agreement with experiment. A strong correlation between…
It has been known for some time that particles of nickel oxide of less than about 100 nm in size show superparamagnetism that increases as the particle size decreases. The origin of the particle magnetic moment responsible for this behavior has never been fully explained. This research indicated that the size of the p…
The highly conductive and textured ZnO films have been grown by metalorganic chemical vapor deposition using diethylzinc and H2O as reactant gases. The B2H6 gas has also been successfully used as an n-type dopant gas to obtain highly conductive ZnO with a sheet resistivity for 2-μm-thick film as low as 10 Ω/⧠ at the v…
The electrochemical behavior of calcium electrodes in a few important organic electrolyte has been investigated. The solvents used included acetonitrile, tetrahydrofuran, γ‐butyrolactone, and propylene carbonate, and the salts included , , , and tetrabutyl ammonium salts ( , ). Various techniques, including cyclic vol…
The band gaps, band structure, and excited-state (exciton) energies of CdS, GaAs, and GaP semiconductor clusters are calculated using pseudopotentials. In addition, the sensitivity of the exciton energies to the size, shape, crystal structure, and lattice constant of the unit cell are investigated. The calculated exci…
We review the current theory of intrinsic dielectric loss, that is the loss in a perfect crystal due to anharmonic interaction of a.c. electric field with the phonon system of the crystal. Both ordinary dielectrics and displacive ferroelectrics are considered. The theory predicts dependence of the loss on frequency ω…
The pronounced Lewis acidity explains the exceptional activity of the title compound as catalyst for olefin epoxidations with hydrogen peroxide. The system MTO/ t BuOH/H 2 O 2 transforms olefins selectively and efficiently into epoxides under very mild conditions (−30 to + 60°C, but normally at room temperature). In g…
Starting from a “worst case” corrosion rate prediction with the deWaard-Milliams equation, correction factors can be applied to quantify the influence of environmental parameters and corrosion product scale formed under various conditions. Equations are proposed for each factor. A low-temperature scale formed in conde…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSurface complexation of colloidal semiconductors strongly enhances interfacial electron-transfer ratesJacques Moser, Swarnalatha Punchihewa, Pierre P. Infelta, and Michael GraetzelCite this: Langmuir 1991, 7, 12, 3012–3018Publication Date (Print):December 1, 1991Publication…
We have investigated the electronic and geometric structure of a thin oxide film grown by oxidation on NiAl(110) using electron spectroscopic techniques, i.e., LEED, EELS, XPS and ARUPS. This film is inert to adsorption of, respectively reaction with many molecules up to temperatures of about 800 K. It is well ordered…
Elements of crystal symmetry: Direct lattice Reciprocal lattice Brillouin zone Crystal structure Point groups Space groups Symmetry of the Brillouin zone Jones zone Surface Brillouin zone Matrix representations of point groups. Lattice dynamics in harmonic approximation - semiclassical treatment: Introduction Lattice…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOn the validity of Wallach's rule: on the density and stability of racemic crystals compared with their chiral counterpartsCarolyn Pratt Brock, W. Bernd Schweizer, and Jack D. DunitzCite this: J. Am. Chem. Soc. 1991, 113, 26, 9811–9820Publication Date (Print):December 1, 199…
Abstract We report calculations of electron inelastic mean free aths (IMEPs) of 50–2000 eV electrons in a group of 15 inorganic compounds (Al 2 O 3 , GaAs, GaP, InAs, InP, InSb, KCl, LiF, NaCl, PbTe, SiC, Si 3 N 4 , SiO 2 and ZnS). As was found in similar calculations for a group of 27 elements, there are substantial…
Surfaces containing poly(ethylene oxide) (PEO) are interesting biomaterials because they exhibit low degrees of protein adsorption and cell adhesion. In this study different molecular weight PEO molecules were covalently attached to poly(ethylene terephthalate) (PET) films using cyanuric chloride chemistry. Prior to t…
Abstract We report calculations of electron inelastic mean free paths (IMFPs) for 50–2000 eV electrons in a group of 27 elements (C, Mg, Al, Si, Ti, V, Cr, Fe, Ni, Cu, Y, Zr, Nb, Mo, Ru, Rh, Pd, Ag, Ta, W, Re, Os, Ir, Pt, Au and Bi). This work extends our previous calculations ( Surf. Interface Anal. 11, 57 (1988)) fo…
Measurements of the triple differential cross section for inelastic photon scattering from bound atomic electrons are reported. The experiment was done using 148 keV synchrotron radiation from the DORIS storage ring at DESY, Hamburg. The target was an 80 nm thin Cu foil.
We investigate the phase-matching properties and the performances of lithium triborate (LBO) crystals, angle- and temperature-tuned to achieve type-I phase matching for ps, high-power, tunable optical parametric amplification (OPA). A novel retracing behavior was observed in the tuning curves of the LBO OPA.
We have carried out high-resolution photoemission experiments on two quasi-one-dimensional compounds: ${\mathrm{K}}_{0.3}$${\mathrm{MoO}}_{3}$ and (${\mathrm{TaSe}}_{4}$${)}_{2}$I. In both systems, a metal-insulator transition associated with a lattice distortion is reported. We show that the Fermi-step characteristic…