Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
The microscopic static structure of dilute binary colloidal suspensions, for compositions covering the full molar fraction range, are investigated using static light scattering experiments. The mixtures of liquid-like ordered suspensions are made from charged polystyrene particles having averaged radii of 42 nm and 65…
A study is presented of the relation between microstructure and 1.54 μm photoluminescence (PL) in high-energy ion-implantated Er in Si as a function of implant dose, energy, and temperature and subsequent anneal. Transmission electron microscopy (TEM) of material implanted at 500 keV and ≳100 °C and annealed at 900 °C…
For high atomic numbers the total cross section for electron-atom elastic scattering calculated using the partial-wave method is found to fall into two regimes over the range 1–100 keV. The cross section in the higher energy regime scales as E−1, and in the lower energy regime as E−0.5. An empirical equation has been…
We report Monte Carlo simulations of a system of two-dimensional, hard, homonuclear dimers. The equation of state and the Gibbs free energy were computed for the fluid phase and several crystalline and noncrystalline (aperiodic) solid structures. We observe that the differences in Gibbs free energy between the various…
Abstract Aluminium is generally regarded as a metal that is difficult to plate. By using a pretreatment sequence, which includes immersion in a zincate solution, it is possible to electroplate aluminium successfully, although adhesion levels are not always very high. Zincate solutions modified by the addition of vario…
Abstract Filter paper and greaseproof paper have been exposed to hydrogen or oxygen plasma. The paper surface composition was determined by ESCA measurements. The unmodified and modified papers then were laminated with polyethylene and the adhesive strength was measured. The hydrogen plasma treatment reduces the cellu…
Abstract The changes induced on the surface of polypropylene homopolymer following flame treatment have been studied. Surface compositions were determined using x‐ray photoelectron spectroscopy and compared to surface free energies estimated from contact angle measurements. The effect of air‐to‐gas ratio, total flow r…
The photosensitive ESR signals of singly negatively charged zinc vacancies (V, (V) and interstitial oxygen ions in a tetrahedral surrounding (O) are detected in undoped ZnO ceramic and their optical excitation and quenching behaviour is studied using the photo-ESR method. The investigations show that all these defects…
Cristallisation dans Pn2 1 a avec a=12,7640, b=10,5153, c=6,3648 A, Z=8; affinement jusqu'a R=0,028. La molecule est isostructurale avec KTiPO 5 decrit par Masse [Thesis (1974), Univ. of Grenoble, France]. Son reseau mixte comprend des octaedres VO 6 partageant des sommets et des tetraedres PO 4 delimitant des tunnels…
A new type of an optical polarizer consisting of anisotropic metallic island films is proposed, and its optical properties are investigated theoretically. It is shown that an extinction ratio of 63 dB and an insertion loss of 0.02 dB at a resonance wavelength, e.g., 0.64 microm, are expected for the polarizer when sil…
The piezoelectric tensor of the organic nonlinear optical compound 2-methyl 4-nitroaniline (MNA) is refined from the measurements of the shift of the Bragg peaks on application of an external electric field. The ``three-step modulation'' method is used, in which the gating of the x-ray signal is synchronized with the…
The growth kinetics of diamond film has been studied, grown by a hot-filament chemical vapor deposition method, to obtain a fundamental information for the growth process of diamond from the gas phase. In order to study the growth kinetics of a pure diamond, the deposition conditions for high-quality diamond are first…
A new linear epoxy polymer containing 4-amino-4′-nitrotolane chromophores attached to the chain backbone was synthesized in an attempt to enhance both the poling-induced nonlinear optical susceptibility and its long-term stability. The polymer films poled by corona discharge showed very large nonlinear optical doublin…
We report the observation of two types of ${\mathrm{BaTiO}}_{3}$ thin films, one exhibiting the Poole-Prenkel transport mechanism and the other the field-enhanced Schottky mechanism. A factor-of-2 difference in the slope of the ${\mathrm{log}}_{10}$(I/V)-vs-${\mathit{V}}^{1/2}$ curves has been measured for these two t…
Diamond films grown in (A)CO/H2 and (B)CO/O2/H2 systems at substrate temperatures (Ts) between 403 and 1023 K were characterized by x-ray diffraction, Raman spectroscopy, cathodoluminescence, and scanning electron microscopy. A large amount of polyacetylene inclusion occurred in the (A)CO/H2 system on reducing Ts, res…
The sublimation entropies of the thorium and uranium tetrahalides (except UI4 ) have been evaluated from torsion–effusion vapor pressure measurements and the results have been analyzed for compatibility with the spectroscopic and molecular constants of the gaseous molecules. New effusion pressure measurements are repo…
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…