Materials Literature
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In this paper the electronic spectra and optical properties of one-electron spherical quantum dot (QD) are presented. QD is composed of CdSe core surrounded by ZnS shell (barrier) CdSe shell and finally by medium of very high potential barrier (SiO2) compared to CdSe. The energy eigenvalues of s, p and d states and co…
Magneto-dielectric materials are a subject of potential interests in terms of basics research and new device applications. In this study, 0.5BaTiO 3 -0.5MgFe 2 O 4 composites with ferroelectric and soft magnetic properties, synthesized using wet chemical methods, were investigated for the possibility of controlling th…
This project sought improved mechanical strength and thermal properties of mixed plastic rejects from cardboard recycling. The Wandel screen, a process unit, captures 75% of a facility’s total plastic output and consists of hot melt (∼37%), polypropylene (∼32%), polyethylene (∼17%) and polystyrene (∼9%). The mixed pla…
The objectives of this experiment were to study the effects of different environmental temperatures during the rearing phase on the heat tolerance and behavioral responses of two Japanese quail lines to heat stress. A total of 192 chicks from two lines were randomly distributed between eight brooding cages. Each line…
Abstract Two-beam systems (focused ion beam (FIB) integrated with a scanning electron microscope (SEM)) have enabled site-specific analysis at the nano-scale through in situ “mill and view” capability at high resolution. In addition, a FIB-SEM can be used to cut away a lamella from a bulk sample and thin it for transm…
Sr2SiO4:Eu2+ nanopowders were synthesized by a co-precipitation method using strontium nitrate, 3-aminopropyltriethoxysilane (APTES), europium nitrate hydrate, and a flux (NH4Cl). The structural and luminescent properties strongly depended on the firing conditions, the amount of APTES, and the flux content. Alpha'-Sr2…
Nanocomposite dielectrics in 6PbO-4BaO-20Na2O-40Nb2O5-30SiO2 system were prepared via melt-quenching followed by controlled crystallization. X-ray diffraction studies reveal that Pb2Nb2O7, Ba,NaNb5O15, NaNbO3 and PbNb2O6 phases are formed from the as-quenched glass annealed in temperature range from 700 degrees C to 8…
Eu doped strontium aluminate phosphor (SrAl2O4:Eu) was synthesized by combustion method using urea as a reducer at initiating temperature of 600°C. The mechanoluminescence (ML) of SrAl2O4:Eu and their suitability for radiation dosimetry have been investigated. Eu doped SrAl2O4 is a good dosimeter having linear respons…
Tapis kelapa (Coconut filter) as natural fiber, in this time its resources very copius but no longer be exploited and thrown off hand as waste though in fact its used for other material dissimilar inovatif and high economic valuable that is as one of natural fiber alternative to be composite. The objective of this res…
New phase diagram data and a thermodynamic assessment of the CeO ‐ Gd 2 O 3 ‐ CoO system using the CALPHAD approach are presented. This information is needed to understand the surprisingly low sintering temperature (950°C–1050°C) of CeO 2 ‐based materials doped with small amounts of transition metal oxide (e.g., CoO )…
In this study, the dispersion relation and the frequency dependence of Bloch impedance in a left handed transmission line (LH-TL) is carried out using the F-matrix formulation and Bloch-Floquet theorem. The artificial LH-TL formed by periodic lumped elements is described and the F-matrix, dispersion relation and the B…
Corrosion resistance behaviour of S43903 ferritic stainless steel was evaluated in different hydrochloric acid and the acid chloride concentrations. The experiments were performed at ambient temperature using potentiodynamic polarization measurement. This paper reports the observed electrochemical response of the expe…
Polybenzidine was synthesized by interfacial polymerization under various monomer concentrations. Effects of monomer concentration on morphology, structure, and properties of polybenzidine were studied by techniques of Fourier Transform Infrared Spectroscopy, Ultraviolet Visible Absorption Spectroscopy, Scanning Elect…
Abstract We report a novel one-pot chemical synthesis of zinc antimonide (Zn–Sb) nanoparticles (NPs) via the sequential reduction of metal precursors and subsequent compositional redistribution. Chemically synthesized Zn–Sb NPs are expected to be promising building blocks for nanostructured thermoelectric materials.
We investigated light absorption in various Si thin film solar absorbers and designed efficient input couplers using finite-difference time-domain simulation. In the simulation, a dielectric coating on Si thin film led to enhanced light absorption at near-ultraviolet to blue wavelengths, while the absorption peaks at…
Submicron powders of solid solutions on the basis of cubic and hexagonal phases existing in a NaF-YF 3 system have been synthesized with the precipitation method from aqueous solutions at room temperature. The conditions for the preparation of single-phase samples have been determined. The upconversion luminescence sp…
The effect of Bi0.90La0.10Fe0.90Zn0.10O3 (BLFZO) thicknesses on the microstructure and multiferroic properties of BiFeO3 (BFO) thin films was investigated, and all bilayered thin films were grown on Pt-coated silicon substrates without any buffer layers by a radio frequency sputtering. A (110) orientation is dominant…
Lead containing bronzes are widely used as bearings, bushings and sliding plates. Lead is a heavy metal and known to be harmful to people and environment, but currently no feasible substitute material exists in many engineering applications. The ecological considerations in recent years have led to restrictions by the…
Electrochemical characterization and metallization of two novel meso-susbstituted porphyrins were carried out by sweep and step potential techniques. Redox potentials of 5,10,15-tris(p-chlorophenyl)- 20-(2-hydroxy-3-methoxyphenyl)porphyrin and 5,10,15-tris(p-methoxyphenyl)-20-(p-chlorophenyl) porphyrin were identified…
Nanocrystalline silicon quantum dots (nc-Si QDs) with various sizes and various doping concentrations were fabricated by supplying different flow rates of silane (SiH 4 ) gas and phosphine (PH 3 ) gas, respectively, under very high frequency (VHF; 144 MHz) plasma. With an increase in the flow rate of SiH 4 gas, the me…