Materials Literature
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Several pillared clays were prepared by using a polyalcohol (ethylene glycol or poly(vinyl alcohol)) or a poly(ethylene oxide) surfactant as an interlayer gallery template and an aluminum oligomer species as the pillaring agent. The use of polyalcohols or nonionic surfactants, such as Tergitol, gave materials which, i…
The nonlinear and anisotropic behavior of grain-oriented ferromagnetic materials enters numerical field computations via the reluctivity tensor. In this paper, an improved reluctivity tensor model is discussed. It is pointed out in which way this model is integrated in a Newton iterative solver. However, to retain the…
We have studied photoluminescence spectra in the band-edge emission region of very high quality undoped ZnO, as a function of both (i) sample growth methods and conditions, and (ii) measurement temperatures. As a result, we have classified the defect types responsible for emission peaks observed in the band-edge emiss…
Abstract A series of uniaxial tensile loading‐unloading tests are performed on injection‐molded isotactic polypropylene at room temperature. In each test, a specimen is stretched up to the maximal strain ϵ max = 0.12 with a constant strain rate, \documentclass{article}\pagestyle{empty}\begin{document}$ \dot \varepsilo…
The pyrolysis of PVC has been conducted in an inert atmosphere and the products distribution was studied. Gas, liquid and tar fractions were separated and analysed by GC-MS and FTIR. A large number of aromatic compounds and alkyl aromatic compounds were found in the liquid fractions. The results showed that the PVC th…
Gold nanoparticles (3.1-5.0 nm in size) surface-derivatized with both electroactive and nonelectroactive self-assembled monolayers were synthesized. The surface-derivatized electroactive particles can be easily oxidized/reduced at an electrode surface based on the diffusion-controlled current-voltage curve observed in…
Abstract The influences of mixing parameters on the carbon black dispersion can be characterized using the electrical conductivity online measured from internal mixer. As a measure for monitoring the development of carbon black dispersion, a normalized conductivity with regard to the conductivity measured at the BIT (…
ABSTRACT: Clay mineral analysis of Spodosols collected from the Adirondack Mountains reveals that smectite is common in the forest floor and uppermost soil horizons (the O, A and E horizons) and probably forms from the transformation of vermiculite via a low-charge vermiculite intermediate. The conversion of vermiculi…
Polycrystalline Fe3O4 films have been prepared by reactive sputtering at room temperature, which is much lower than the reported temperature of above 500 K to deposit high quality Fe3O4 films. Transmission electron microscopy image shows that uniform Fe3O4 grains are well separated by grain boundaries and their size i…
We have investigated the Cu texture in damascene interconnect structures formed by the reflow method of sputtered Cu film and electromigration (EM) performance in Cu damascene interconnects. The texture of reflowed Cu film depends on Cu deposition temperature and line width. Improved 〈111〉 texture in blanket films is…
To enable the development of remote gas sources, X120 grade UOE linepipe has been developed. Low carbon- low Pcm and Mn-Ni-Mo-Nb-V-B bearing steel with a microstructure of fine ausformed martensite and bainite has excellent combinations of strength and toughness. With respect to longitudinal seam welding, the X120 pip…
BACKGROUND AND AIM OF THE STUDY: The selection of a suitable cell type for scaffold seeding, its isolation and adequate expansion in vitro remains a major challenge in tissue valve engineering. The study aim was to establish a model for efficient procurement of myofibroblasts for in-vitro seeding using fibroblasts as…
Specific details of both fabrication process and geometry of Cu interconnects result in different electromigration (EM) fail modes. This paper discusses EM characteristics of line depletion stress, i.e., for the case of electrons flowing from a via above into a Cu line through a Cu diffusion barrier to cause voiding i…
Abstract A summary is given of the workshop entitled ‘XPS: From Spectra to Results–Towards an Expert System’ that was held in St. Malo, France, on 22–26 April 2002 under the sponsorship of the International Union of Vacuum Science, Technique and Applications (IUVSTA). This workshop was held to develop the structure an…
The temperature and magnetic field dependence of the resistivity, magnetoresistance, and magnetic susceptibility of phase-separated manganites in the temperature range corresponding to nonmetallic behavior are considered within the framework of a model of inhomogeneous state with allowance for the existence of ferroma…
Partial discharge measurements performed at 0.1, 20, 50 and 300 Hz and at different voltage levels are compared with simulations based on models available in literature. It is shown that these models need to be improved to be able to fully extrapolate PD behavior at different frequencies. A solution based on a time-de…
We present a new method to characterize in-situ the optical thickness of porous alumina films by the use of photoluminescence-induced Fabry-Pérot-interferences. Additionally we show, that the use of different electrolytes yields different photoluminescence pattern. A second experiment allows to determine the degree of…
An experimental study of the crystal structure and the magnetic and elastic properties of the manganites Bi1−xSrxMnO3 is carried out. The following phase transformations are found: ferromagnet (x<0.15)–spin glass (0.15⩽x⩽0.25)–charge-ordered antiferromagnet (0.35⩽x⩽0.8). The ferromagnetic state corresponds to o…
Some of the problems facing partial discharge (PD) measurements in rotating machines, especially during online measurements are: i) calibration of the measurements; ii) high noise levels interfering with both the measurement system and the winding under the test; as well as iii) attenuation and distortion of PD signal…
The optical properties of vanadium oxide nanotube dispersions have been characterized using visible and near infrared absorption spectroscopy, Fourier transform infrared spectroscopy, Raman spectroscopy, and nonlinear transmission of optical intensities in the visible and near infrared. Using transmission electron mic…