Materials Literature
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A detailed investigation of the THz dynamics in glassy SiSe2 by means of neutron inelastic scattering is presented. To carefully map the translational dynamics and the region of the boson peak, we carried out two different experiments with sharp and broad resolutions coupled with a narrow and a wide kinematic range, r…
Oxynitride long‐lasting phosphorescence ( LLP ) phosphor SrSi 2 O 2 N 2 : Eu 2+ was prepared by a new method using SrSi alloy as a precursor. Its properties were systematically investigated utilizing XRD , photoluminescence, excited‐state decay curve, long‐lasting phosphorescence, and thermoluminescence spectrum. This…
A gelling system based on the polymerization of epoxy resin ethylene glycol diglycidyl ether ( EGDGE ) and 3,3′‐Diaminodipropylamine ( DPTA ) was developed for gelcasting alumina ceramics. The gelation process of 50 vol% alumina‐epoxy resin suspensions were investigated in accordance with the change in temperature and…
In this paper, low-energy proton irradiation effects on the evolution of deep charge traps in proton pre-irradiated polyimide are investigated using the photo-stimulated discharge (PSD) technique. The results indicate that in the PSD spectrum there appear three discharge bands with some sub-peaks in the wavelength ran…
Epitaxial SrRuO3 films were grown under different oxygen partial pressures inducing different amounts of oxygen vacancies. In spite of microstructural disorders, a considerable improvement in the conductivity was observed at ambient temperature with increasing the oxygen vacancies. The oxygen vacancies are responsible…
In fibrous porous media, some polymer materials are often used to control of surface property such as making hydrophobic surface and to make another function such as electrolyte. However, all of these polymers are not always distribute in porous media uniformly. The micro pores are blocked with it and it leads to the…
A VO x microbolometer coupled with thin-film spiral antenna was fabricated on a fused-quartz substrate by metal–organic decomposition (MOD). The size of the bolometer was 1 ×52 µm 2 , and the antenna was designed for operating at 75–110 GHz. The DC sensitivity and responsivity of the bolometer were 540 W -1 and 124 V/…
This article reports the structural and luminescence characteristics of Eu 2+ ‐activated solid solutions of ( KSrPO 4 ) 1− x ·(( Ba , Sr ) 2 SiO 4 ) x for 0 ≤ x ≤ 1. These phosphors were prepared by a sol‐gel/Pechini method. The lattice parameters of the solid solutions are linearly dependent on x . The reliability fa…
We study the rf-sputtered MgZnO/ZnO heterostructure material system. Two dimensional electron gases are observed in the defective polycrystalline material system. As the MgZnO thickness increases, the sheet resistance reduces rapidly and then saturates. The enhancement of the interfacial polarization effect becomes st…
We demonstrate the improvement and formation of UV-induced damage on LBO crystal output surface during long-term (130 h) high-power (20 W) high-repetition-rate (80 kHz) third-harmonic generation. The output surface was super-polished (RMS surface roughness <0.6 nm) to sub-nanometer scale super smooth roughness. The su…
PURPOSE: Phase contrast imaging, particularly of the breast, is being actively investigated. The purpose of this work is to investigate the x-ray phase contrast properties of breast tissues and commonly used breast tissue substitutes or phantom materials with an aim of determining the phantom materials best representa…
This study focuses on the evaluation of sewing thread consumption of jean pants using the fuzzy logic theory. Referring to literature works, fuzzy logic method remains an accurate method that allows a new level of flexibility over traditional mathematical methods in defining and evaluating constraints. The application…
Synthesis and growth of Vanadium dioxide on Silicon substrates has been investigated by Atomic Layer Deposition (ALD). ALD Vanadium oxide films were synthesized by using the novel Tetrakis[ethylmethylamino] vanadium {V(NEtMe)4} [TEMAV], as the vanadium precursor source and H2O vapor as the oxidizing source. The as-pre…
Oxidation behavior of HfSi CNO ceramics for Hf / Si ratio of 0.09 at 1400°C–1600°C in ambient air is reported. Quantitative X ‐ray analysis of oxidized powders shows crystalli‐zation of the amorphous phase into tetragonal hafnia, hafnon, and cristobalite (carbides, seen in inert atmosphere heat treatments are absent).…
In the present work, porous lead zirconate titanate ( PZT ) ceramics with porosity ranging from 27.8% to 72.4% were fabricated by the gel‐casting process of particle‐stabilized wet foams with the initial solid loading of 10–30 vol%. The phase, the microstructure, the dielectric property, and the piezoelectric property…
A self-limiting growth process based on the interface-controlled reaction of molten boron oxide (B2 O3 ) with ammonia (NH3 ) is demonstrated for the facile and lost-cost synthesis of ultrathin (20-30 nm) crystalline hexagonal boron nitride (h-BN) films over large areas. The as-grown h-BN films are of high quality, bei…
Characteristic of local water hyacinth (WH) fibers and composites that consist of mixing WH fibers and unsaturated polyester (UPR) were studied. Composites mixed with the WH fibers treated in different alkali concentration for 1 h soaking time were tested by tensile and flexure machine and their fracture surface was o…
The modified eccentric connectivity (MEC) polynomial of a molecular graph, G, is defined as (G,x) = nG(u) xecc(u), where ecc(u) is defined as the length of a maximal path connecting u to another vertex of molecular graph G and nG(u) is the sum of the degrees of its neighborhoods. The MEC index is the first derivative…
The $H\ensuremath{-}T$ phase diagrams of single crystalline electron-doped ${\text{K}}_{0.83}{\text{Fe}}_{1.83}{\text{Se}}_{2}$ (KFS1), ${\text{K}}_{0.8}{\text{Fe}}_{2}{\text{Se}}_{2}$ (KFS2) and hole-doped ${\text{Eu}}_{0.5}{\text{K}}_{0.5}{\text{Fe}}_{2}{\text{As}}_{2}$ (EKFA) have been deduced from tunnel diode osc…
We report the synthesis and properties of a homologous series of asymmetrically substituted 4-(5-(4-benzyloxyphenyl)-1,3,4-oxadiazol-2-yl)phenyl 2-X-4-dodecyloxybenzoates, which have pronounced hockey-stick molecular architectures. The structure was varied through the lateral substitution with various groups, X (H, Me…