Materials Literature
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Abstract Thus far, three different ribbons and layers of antimony atoms with various Sb–Sb bonds were found in Hf5Sb9, HfSb2 and HfSbTe. We uncovered a new variant when trying to dope Hf5Sb9 with tellurium atoms, namely HfSb2–xTex, with 0.4 ≤ x ≤ 0.7. HfSb2–xTex adopts the monoclinic OsGe2 type, space group C2/m, a =…
We have grown a semipolar Al0.83Ga0.17N/AlN heterostructure on ZnO (11¯02) substrates and investigated the optical polarization characteristics of the near-band-edge (NBE) emission of Al0.83Ga0.17N experimentally and theoretically. Reciprocal space mapping measurements revealed that AlN is fully relaxed with respect t…
The effect of disorder in polyhalide anions is investigated in terms of the degree of charge transfer and the Fermi surface in the incommensurate organic superconductor (MDT-TSF)I${}_{0.77}$Br${}_{0.52}$, where MDT-TSF is methylenedithio-tetraselenafulvalene. The Raman spectra suggest that the infinite polyhalide chai…
Abstract The title compounds are synthesized from stoichiometric amounts of SrCO3, CaCO3, Fe2O3, and Mn2O3 either in air or in argon (1250 °C, 100 h).
We have performed the Density Functional Tight Binding (DFTB) study on the structural properties of Zinc Oxide Nanoparticles (NP), focusing on the effects induced by the surfaces and quantum size effect. Effects of surface relaxation and surface stress which is absent in atomistic model are taken carefully into accoun…
Twenty nine sewing threads belonging to eight categories were analyzed in terms of simple-, loop- and knot-tensile properties. The structure of sewing threads and fibers constituting the threads influence the strength of the sewing threads. Tensile strengths, breaking extension and specific work of rupture in loop and…
Voltage and current distortions caused by nonlinear characteristic of electronic and power electronic devices may cause a large number of problems for electrical equipments such as, mal-operation, additional losses, heat and excessive insulating stresses. Transformers are the most important equipments in power and dis…
In the current work, 1 wt% Acrawax was premixed with the aluminium and magnesium powder as a lubricant for the first group samples. However, no wax was used for the second group specimens. As a sintering aid, 1 wt% Mg was added for both group materials. Compaction of the specimens was performed using a manual Carver h…
Abstract In this Letter we report on the spin‐torque‐driven magnetic switching and dynamic excitations in spin‐valve, circular nanocontacts, incorporating an unpinned CoFe/Ru/CoFe artificial antiferromagnet as polarizer. Our investigation concentrates on the influence of the magnetic free layer moment and of the nanoc…
Abstract The traditional PA 6.6 production route, i.e. solution melt polymerization followed by extrusion, is applied to the in situ intercalation of PA 6.6/clay nanocomposites. Organoclays of different types are tested and the derived nanocomposites are thoroughly characterized in terms of molecular weight, thermal p…
Natural fibers are used in many fields such us textile, technical or medical applications. They present multiple characteristics and even the fiber waste can be used efficiently. In this survey, we opted to measure some esparto fiber waste properties in order to determine their potential use. The studied wastes are fi…
This chapter provides a large number of the types of equations for, which the designer of ultrasonic equipment and applications may have a need. To cover the wide range of uses for ultrasonic energy, the design of ultrasonic systems and of their applications involves the use of many equations. The oscillating mass-loa…
Abstract Wurtzite‐structured CuInxGa1‐xS2 (0 ≤ x ≤ 1) is synthesized by rapidly injecting a mixture of 1‐dodecanethiol and tert.‐dodecanethiol into a solution of Cu(acac)2, In(acac)3, Ga(acac)3, trioctylphosphine oxide, and oleylamine at 150 °C with nitrogen purging, followed by heating at 280—290 °C for 30 min.
Single crystals of the title compound, dipotassium aluminium tin(IV) tris-[phosphate(V)], K(2)AlSn(PO(4))(3), were synthesized by a high temperature reaction in a platinum crucible. In the structure, the Al(III) and Sn(IV) atoms occupy the same site on a threefold rotation axis with occupational disorder in a 1:1 rati…
In this paper, the surrounded atom model is developed to study the order-disorder phase transition in binary alloys. We calculate the configurational free energy of the alloys, derive the equation of equilibrium and determine the critical temperature of the phase transition.
Abstract Hydrated sodium montmorillonite (Na‐clay) has been used as a catalyst support for the heterogeneous atom transfer radical polymerization of benzyl methacrylate in the presence of various concentrations of water, reducing agent, and CuBr2 in anisole at ambient temperature. The polymerization was promoted via r…
This study considers the effect of a slanted side cooling wall that has varying inclination angles on the development of thermosolutal convection during the solidification of a super-eutectic aqueous ammonium chloride (NH4Cl-H2O) solution. The shadowgraph and particle image velocimetry techniques were employed to obse…
A series of nanosized platinum-containing catalysts was successfully loaded on/in zeolite H-ZSM-5 via exchanging the zeolitic proton with platinum from Pt tetramine dichloride complex. Another series of Pt/H-ZSM-5 catalysts was prepared via wet impregnation of H2PtCl6 solution for comparison. The latter series was fou…
The thin films of ordered mesoporous silica (SBA-15) with nanometer-sized pores have been formed on silicon substrates. It was confirmed that the pores were hexagonally ordered as the stacking of rows of pores and silica walls in the direction normal to the substrate surface. From the results of X-ray reflectivity and…
Abstract The photoluminescence and vibrational properties of silicon nanocrystals are studied in a multilayered system elaborated by successive evaporations of SiO and SiO2 layers with controlled thicknesses. The multilayer systems are deposited on a glass substrate (Herasil). The photoluminescence and Raman spectra a…