Materials Literature
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Abstract Silica-supported Rh catalysts with different Rh particle dimensions were investigated for CO hydrogenation. The catalysts were characterized by various techniques such as TEM, H 2 -TPR and N 2 adsorption to study the catalyst morphology, the size distributions of Rh particles and the silica pores. It was foun…
ASTRACT Dislocations are the most common type of secondary defects and are unavoidaly present in all crystalline materials. They have een oserved in ferroelectric materials as in many other materials systems. Experiments have shown that they may have a significant impact on the degradation of the electrical properties…
Time decay of photoluminescence due to interstitial oxygen molecules (O2) in synthetic amorphous SiO2(a-SiO2) was studied by varying the fictive temperature and the concentrations of common dopants (SiOH, SiCl, and SiF groups). The decay constant is insensitive to the fictive temperature, but strongly depends on the t…
The ability of a critical dimension scanning electron microscope (CD-SEM) to resolve differences in the widths of two lines depends on the instrument's measurement repeatability and any sample-dependent biases. The dependence of repeatability and bias on eight different parameters is studied using the MONSEL Monte Car…
We have grown thin films of cuprous oxide (Cu 2 O) from the melt in a small gap between paired substrates of MgO or Al 2 O 3 single crystals. The films are characterized by scanning electron microscopy, X-ray diffraction and optical spectroscopy. The thickness of the films is found to range from 16 nm to 20 µm. The do…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation P. C. P. Hrudey, M. Taschuk, Y. Y. Tsui, R. Fedosejevs, M. J. Brett; Optical properties of porous…
The evolutions of the strain-induced crystalline phase of poly(ethylene terephthalate) (PET), poly(m-xylene adipamide) (MXD6), and PET–MXD6–ionomer blend films are investigated by differential scanning calorimetry, X-ray diffraction, and birefringence measurements. Initially wholly amorphous, the films are uniaxially…
The durability of irradiated organic polymers in solid-polymer-electrolyte water electrolyzer was investigated by gamma-ray irradiation tests around 500 kGy. Serious deteriorations for the tensile strength and ion exchange capacity of the ion exchange membrane (Nafion®) were not observed up to 850 kGy. No serious dama…
Abstract High‐pressure laser chemical vapor deposition (HP‐LCVD) is a powerful tool for growing complex microstructures at rapid rates. Not only is it possible to deposit functionally graded materials, but new metastable phases, alloys, and composite materials may be realized. In this paper, the diversity of microstru…
Infection of cells transduced with a lentiviral vector by human immunodeficiency virus (HIV) could lead to packaging of the lentiviral vector RNA into HIV particles and unintended transfer of the vector. To prevent this, the Rev-responsive element (RRE) of an HIV-1 vector was functionally replaced by a heterologous RN…
The nucleation and evolution of Ni nanoparticles during reduction of a Ni(NO3)2.6H2O precursor supported on a commercial titania substrate have been studied in situ at atomic resolution using environmental transmission electron microscopy. An incipient wetness technique was used to prepare the starting unreduced mater…
Abstract The first antiferromagnetic organic superconductor, κ-(BETS)2FeBr4 [BETS = bis(ethylenedithio)tetraselenafulvalene], was developed in the search for novel magnetic molecular conductors. This salt shows successive antiferromagnetic and superconducting transitions at TN = 2.5 K and Tc = 1.1 K, respectively, at…
By means of lattice and molecular dynamics we study the theoretical strength of homogeneously strained, defect-free 2D crystals whose atoms interact via pair potentials with short- and longer-ranged interactions, respectively. We calculate the instability surface, i.e. the boundary in the 3D homogeneous strain space (…
Photoluminescence properties were improved in CaTiO 3 :Pr 3+ phosphor by substitution of Ba and Sr for Ca to a large extent of Ba (0–20%) and Sr (0–45%) fractions. Red emission intensity at 612 nm was greatly enhanced. It achieved its largest value in Ca 0.7 Sr 0.3 TiO 3 :Pr 3+ sample, higher by 192% than CaTiO 3 :Pr…
We give a general introduction into polarized imaging and report on a Jones pupil approach for a complete evaluation of the resulting optical performance. The Jones pupil assigns a Jones matrix to each point of the exit pupil, describing the impact of both the global phase and the polarization on imaging. While we alr…
Nanoparticles of BaZrO 3 have been prepared through a reverse micelle synthesis. The as-processed particles consisted of amorphous Ba−Zr−O and crystalline Zr 0.95 O 2 particles with an average diameter of approximately 7.5 nm. Conversion of the powders to crystalline BaZrO 3 nanoparticles occurred upon heat treatment…
Purpose To provide an efficient and robust constitutive equations for concrete ion application to high rate dynamics. Design/methodology/approach Develops an explicit‐implicit integration scheme for a concrete model. This robust integration scheme ensures computational efficiency. Comparison between simulations of imp…
The U.S. Department of Energy's (DOE) Office of Fossil Energy's (FE) National Energy Technology Laboratory (NETL), in partnership with private industries, is leading the development and demonstration of high‐efficiency solid oxide fuel cells (SOFCs) and fuel cell turbine hybrid power generation systems for distributed…
Microwave (MW) and high-intensity ultrasound (US) have emerged as powerful techniques for the elimination of persistent organic pollutants (POPs) that constitute a major health hazard, whether by direct exposure or through accumulation in biota. In order to achieve decontamination, POPs should be completely mineralize…
EPDM/PP blends were prepared by melt mixing using Brabender Plasticorder at 200°C and 100 rpm. The curative concentration was progressively increased from 1 to 3.5 phr EPDM in order to study the influence of dynamic vulcanization on the mechanical properties of the blend. The effectiveness of dynamic vulcanization was…