Materials Literature
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Visible light thermal radiation from SiO2 glass doped with Y, La, Ce, Pr, Nd, Eu, Tb, Dy, Ho, Er, Tm, Yb, and Lu were studied for the fiber-optic thermometer application based on the temperature dependence of thermal radiation. Thermal radiations according to Planck's law of radiation are observed from the SiO2 fibers…
In various kinds of shape memory alloy (SMA), Fe-based SMA (Fe-SMA) shows smaller shape memory effect compared with the other SMAs. However, Fe-SMA shows huge advantages on the excellent formability, machinability, etc. Moreover, its production cost is cheaper than other SMAs; therefore, the alloy is attempted to be a…
Molecular dynamics simulations were carried out to study the configuration energy and radial distribution functions of mmonium dihydrogen phosphate solution at different temperatures. The dihydrogen phosphate ion was treated as a seven-site model and the ammonium ion was regarded as a five-site model, while a simple-p…
The synthesis of new diporphyrinylamines is described. In particular, the possibility to use the Buchwald or Ullmann amination reactions to obtain these compounds is detailed. Attempts to obtain symmetrical diporphyrinylamines linked by a tertiary amine are exposed and the obtention as side-product of an unexpected un…
Basic properties of synthetic Mg-Al layered double hydroxides were studied. It was shown that these properties strongly depend on the chemical composition and calcination temperature and are of key importance for determining the activity of catalysts based on these compounds. A relationship was found between the basic…
Precise estimation of flux and accurate modeling are of paramount importance for improving control performance in induction machines. Non-linearities limit the performance of control techniques, which in general assume linearity of the components. The paper proposes a procedure to identify magnetic saturation and hyst…
This research aims to study the flow pattern and extrudate swell properties of a Natural Rubber (NR) compound in a constant shear rate capillary rheometer, using two types of annular die: convergent annular and divergent annular. Results revealed that flow patterns that occurred in the barrels of both types of annular…
An analytical model for calculating the pull-in voltage of micro cantilever beams subject to electrostatic force is developed based on a modified stress theory in this paper. The analytical model considers size effect, the fringing fields between the micro curled beam and the substrate as well as the initial curling i…
The modification of a glassy carbon (GC) electrode with platinum (PtNPs) and gold (AuNPs) nanoparticles was intended to fabricate efficient anodes for the formic acid electro-oxidation (FAO). A suitable deposition sequence of PtNPs and AuNPs was adjusted to enhance the electrocatalytic activity of the electrode in suc…
The expansion of nanoscale optics has generated a variety of scanning probe geometries that yield spatial resolution below 10 nm. In this work, we present a physical model for coupling far-field radiation to plasmonic modes on the surface of a scanning probe, and propose a scheme for extending the working distance of…
The method of molecular dynamics (MD) has been used to study γ surfaces in crystallographic planes of cementite containing Burgers vector [100]. Displacement vectors that correspond to stable stacking faults (SFs) and the energies of these SFs have been determined. The energies of unstable SFs, which characterize the…
Pyrolysis, kinetics properties and a kinetic model of epoxidized natural rubber (ENR-50) were studied in this work by differential scanning calorimeter (DSC) and thermogravimetry analysis (TGA/DTGA) tests. DSC results indicated that the ENR-50 rubber remained still, without degradation, until 354.65°C and ENR-50 degra…
The paper describes frequency dependence correction of the Agilent 3458A DMM in DCV sampling mode. The biggest error source identified is the input filter roll-off, which was measured and evaluated with an asynchronous sampling technique using phase sensitive sine fit algorithm. Corrected response is flat within 50 μV…
A localized nanoplasmonic induced absorption enhancement in silicon nitride (Si3N4) dielectric material using a nanoscale novel checkerboard gold (Au) structure is demonstrated. The checkerboard structure is fabricated on a Si3N4layer using electron-beam lithography and sputter deposition techniques. The plasmonic ele…
In this experimental study, the effects of nanofiber dressings containing different forms of silver on full-thickness rat burn contaminated with Candida albicans was analyzed. A full-thickness skin burn was formed on a total of 32 Sprague-Dawley rats. After the burn wound was seeded with a 10 colony-forming units/ml s…
Previous modeling and experimental studies have suggested that Cu-based metal catalysts can preferentially produce metallic carbon nanotubes. Here, we explain this selectivity by separately modeling nanotube cap nucleation and nanotube growth on Cu and Ni x Cu 1– x surfaces. Cap nucleation is modeled by invoking an ep…
The nonlinear vibrations and chaotic motion of a carbon nanotube subjected to axial loads and rested on a Winkler and Pasternak foundation are studied. It is assumed that the carbon nanotube is simply-supported at both ends. The governing equation of motion for the nanotube and foundation system using the Euler-Bernou…
This paper concentrates on the corona discharge of overhead line insulators. Based on the fusion of corona discharge theory, high voltage insulation theory and ultraviolet photon detection theory, a new method of detection of insulator partial discharge is proposed, which applies ultraviolet pulse detection method in…
Our investigation of in situ observations on electronic and mechanical properties of nano materials using a scanning electron microscope (SEM) and a transmission electron microscope (TEM) with the help of traditional micro-electro-mechanical system (MEMS) technology has been reviewed. Thanks to the stability, continui…
Abstract Bariopharmacoalumite-Q2a2b2c, Ba0.5(Cu,ZnO)0.1H0.6[Al4(OH)4(As0.9Al0.1O4)3]·5.5H2O, from the south mine of the old copper mine at Cap Garonne, France, has a 2 × 2 × 2 I-centred tetragonal superstructure of the basic pharmacosiderite-type structure. Cell parameters are a = 15.405(2) Å and c = 15.553(3) Å. The…