Materials Literature
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The preparation and spectroscopic properties of a series of metallocorroles with polar head groups CHO and CH = C ( CN )( COOH ) are reported, as well as the X-ray crystal structure of 5,10,15-tris(pentafluorophenyl)corrolatoaluminium(III)bispyridine (triclinic space group (P-1) with unit cell parameters: a = 9.426(1)…
The copolymers of triethoxyvinylsilane (TEVS) with styrene (St), butyl acrylate (BA), and methacrylic acid (MAA) were prepared by emulsion polymerization. The copolymerization was carried out by using auxiliary agents at 90 °C in the presence of potassium peroxodisulfate (KPS) as the initiator. Nonylphenol ethylene ox…
Four carbon black grades (namely N234, N375, N660, and N991) having surface area of 120, 90, 36, and 8 m2/g have been studied together with a micronized synthetic graphite and a rubber crumb in their reaction with ozone. The study was conducted at room temperature in heterogeneous and static conditions inside an infra…
Abstract This work studies the flow behavior of a developing two‐phase gas‐polymer suspension during injection into the instrumented mold cavity of an injection molding machine. In the experiments, blowing agent type and concentration were varied along with processing conditions, to generate controlled cell structures…
The concentration dependence of the fluorescence quantum efficiency in Nd3+ doped lead lanthanum zirconate titanate (PLZT), transparent ceramics, is presented. The total emission decay of the emitting level F3∕24 is close to exponential, even for high Nd3+ concentration Nt, due to the very low probability of the cross…
Isothermal crystallization of amorphous SbxTe films capped with ZnS-SiO2 or GeCrN layers was performed using in situ heating within a transmission electron microscope. The effect of the electron beam of the microscope on the crystallization process was investigated. It was found that electron irradiation during the cr…
The dynamical characteristics of dual-period perfectly conducting gratings are explored. Gratings with several grooves (reflection) or slits (transmission) within each period are considered. A scalar approach is proposed to derive the general characteristics of the diffracted response. It was found that compound grati…
Most of the semi-empirical “threshold fouling” models for crude oil fouling in shell-and-tube exchangers have been developed and validated using data collected at what may be considered to be “point” or localized conditions. In practice, both velocity and wall temperature can vary significantly within a heat exchanger…
The understanding of the interparticle interactions and reactivities is essential to the exploitation of the unique optical, electronic, and chemical or biological properties of gold nanoparticles in many areas of nanotechnology. This paper describes findings of a comparison of optical properties of molecularlymediate…
This paper relates the application of two of the methods for testing the thermal interface materials to the development and characterization of high performance materials. Particular strengths of different test methods provide a more complete understanding of TIM performance. In combination the tools provide effective…
Vertically oriented single wall nanotubes (SWNTs) and few walled nanotubes (FWNTs) have been grown by electronic cyclotron resonance plasma enhanced chemical vapor deposition (PECVD) on silica flat substrates. The impact of the plasma parameters on SWNT and FWNT growth has been investigated using two different etching…
Abstract In this paper we present and discuss the results of first first‐principle modelling of point defects in nitride nuclear fuels. Calculations have been performed using the VASP computer code combined with supercells containing up to 250 atoms. The effective atomic charges, the electronic density redistribution,…
Powders of chromite ore processing residue (COPR) were mineralogically evaluated using quantitative X-ray powder diffraction (XRPD) to illustrate the impacts of sample preparation procedures. Chromite ore processing residue is strongly alkaline, reactive, contains minerals of varying hardness and absorption coefficien…
Catalysts for the oxidation of volatile organic compounds (VOCs) were prepared by supporting 1% gold on cerium and zirconium oxides (CeO2, Ce 0.5 Zr 0.5 O 2 , ZrO 2 ) using a simple impregnation method followed by reduction of gold in the presence or absence of ammonia (N). The catalysts were tested in model reactions…
A practical and highly efficient method for the protection of amines to their corresponding N-Boc derivatives is reported. In the absence of any solvent and catalyst, the present strategy works well for a series of electron-deficient and electron-rich aromatic amines as well as some sterically hindered substrates.
A vapor phase process is described for the synthesis of one-dimensional zinc oxide nanocrystal arrays. Using this process, well-aligned ZnO nanorod arrays are grown on (100) Si substrates with no catalyst. Cathodoluminescence, x-ray diffraction, and electron microscopy results demonstrate that the nanorods are charact…
This paper reports on the improvement of thermal interfaces through the control of particle stacking during bondline formation. Particle stacking occurs in highly filled materials due to pressure gradients developing during squeeze flow over a rectangular surface, resulting in non-uniform interface properties and thic…
A method for reconstruction of the stress-strain diagrams of steel objects from their magnetic characteristics determined directly during tension has been suggested. The coercive force, residual induction in the major hysteresis loops, and the maximum magnetic permeability are recommended as parameters for nondestruct…
Abstract The use of maize starch as an alternative material for producing cast films is highly dependent on the treatment conditions in order to obtain a biopolymer with outstanding properties. Thermal treatment conditions were controlled in maize starch cast films as a preliminary step in the modification of polymer…
Research and development of minor actinide-containing fuels and targets, i.e., (Pu,Am)O2–MgO, (Pu,Np)O2–MgO, (U,Pu,Np)O2, (U,Pu,Np)N and (Pu,Np,Zr)N, for use in a future integrated closed cycle system that includes fast reactor and accelerator driven sub-critical system is underway. The present statuses of fabrication…