Materials Literature
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The thermal conductivity of a chemically vapor deposited (CVD) diamond film containing 0.07% 13C was measured as a function of temperature by ac and dc techniques and compared to CVD diamond with a natural isotopic abundance of 1.07% 13C. Unlike the single-crystal case where a large isotope enhancement effect has been…
Fourier transform infrared attenuated total reflection spectra of silica glasses implanted with Si or P were measured using a Ge as an internal reflection element. Calculated penetration depth of the infrared radiation is 0.2–1.0 μm depending on the wavelength. These values are comparable to the depths of ions implant…
The temperature dependence of the epitaxial growth of cerium dioxide (CeO2) layers on (111) silicon substrates was studied using ultra-high-vacuum evaporation, varying the substrate temperature in the range between 150 and 900 °C. Characterization using Rutherford backscattering spectrometry and reflection high-energy…
Thermal stress-induced voiding in narrow aluminum-based metallizations used as interconnects in microelectronic circuits has recently become a serious reliability concern. Room-temperature stress relaxation and associated physical phenomena in passivated and unpassivated aluminum-based metallizations, subsequent to ex…
We use Monte Carlo methods to study a lattice model of a dense melt of symmetric diblock copolymers. The calculations are performed in three dimensions using a slithering snake algorithm. In this work we present results for temperatures at and above the microphase separation transition (MST). The location of the MST i…
Cristallisation dans P3m1 avec a=4,272, c=17,633 A, Z=3; affinement jusqu'a R=0,035. La structure comprend neuf couches empilees le long de l'axe c et presente la combinaison d'empilements de cinq couches de Sb 2 Te 3 et d'empilements de deux couches de Sb 2
Low energy (0–12 eV) electron impact on condensed amorphous H2O and D2O films is shown to induce electron stimulated desorption of H− and D−, respectively, via dissociative electron attachment. The onsets for H− and D− detection are at 5.5 eV, with a maximum yield for anion desorption at ∼7.4 eV. The kinetic energy di…
Strongly [001] oriented lead zirconate-titanate [Pb(ZrxTi1−x)O3] thin films with tetragonal structure (0<x<0.52) have been successfully grown on (100)Pt/(100)MgO substrates by using metalorganic chemical vapor deposition (MOCVD). The metalorganic precursors were Pb(C2H5)4, Zr(DPM)4 and Ti(i-OC3H7)4. Scan…
ZnO, which normally occurs in the hexagonal wurtzite structure, can be transformed to the cubic rocksalt (NaCl) structure by the application of high pressure; this cubic phase has been reported to be metastable at atmospheric pressure. The band structure of this phase is calculated by the ab initio correlated Hartree-…
Synthetic diamonds grown using a solvent catalyst that contains Ni show the 1.401-1.404 eV luminescence and absorption system. Isotope splitting data on the zero-phonon lines establish that the optical center contains one Ni atom. Uniaxial stress and Zeeman measurements are reported. We show that the optical transitio…
Abstract A review of experimental data concerning the behaviour of fission products in nuclear fuels is used to illustrate the significant variation in solubility exhibited by the different species. To understand the reasons for this variation, it is necessary to obtain a reliable estimate of the solution energies and…
Toxicity and in vivo antitumor activity against five solid tumors (C 26, C 38, M 5076, MKN-45, MX-1) of Adriamycin (ADR)-conjugated poly(ethylene glycol)-poly(aspartic acid) block copolymer (PEG-P[Asp(ADR)]) were evaluated, and its pharmacokinetic behavior in blood and biodistribution by i.v. injection were obtained.…
The dielectric constants and dielectric loss tangents of Li-Ti ferrites of different composition were measured at room temperature using a capacitance bridge at low frequencies. It was observed that the lower concentration of titanium (<0.6 mole of Ti) had minimal effect on the value of the dielectric constant, while…
A detailed analysis of the spectrum of the light emitted during thermoluminescence (TL) from irradiated LiF(Mg, Cu, P) is presented. The data show how the emission characteristics vary as functions of the concentrations of the individual dopants (Mg, Cu and P) and of the pre-irradiation heat treatments. It is suggeste…
The photostimulated luminescence (PSL) and thermally stimulated luminescence (TSL) of Y 2 SiO 5 -Ce 3+ and Y 2 SiO 5 -Ce 3+ , Sm 3+ is reported and discussed. The PSL measurements show that these compositions are rather efficient X-ray storage phosphors with a short response and decay time (35+or-10ns). A model for th…
Recent advances in the design and synthesis of organic synthetic metals have yielded materials that have the highest superconducting transition temperatures (T(c) approximately 13 kelvin) reported for these systems. These materials have crystal structures consisting of alternating layers of organic donor molecules and…
Single-crystal graphite has been compressed at room temperature and found to undergo a transformation at 18 gigapascals as indicated by a drastic increase in the optical transmittance. This high-pressure phase is unquenchable; a more transparent phase formed by the heating of this phase can be quenched at ambient cond…
The upper temperature for superconductivity in organic conductors has increased from 1 kelvin in 1980, when the phenomenon was discovered in the quasi-one-dimensional cation radical salt tetramethyltetraselenafulvalene phosphorus heptafluoride to 12 kelvin in a new series of organic salts that show nearly two-dimensio…
Abstract The aim of the authors in this monograph has been to present a general review of the magnetic properties of the rare earth metals, and a comprehensive, unified, and coherent account of the magnetic structures and excitations. These both reflect the nature of the fundamental interactions, and determine many of…
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” opt…