Materials Literature
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This paper presents a maskless, direct-write process to create both n- and p-type graphene channel FETs (Field Effect Transistors) on a single substrate. There are following achievements as compared with previous works: (1) direct deposition of controllable, arbitrary fiber patterns to construct graphene-based transis…
Previously unknown mixed oxide RaPbO3 was prepared by thermal decomposition of a mixture of radium and lead carbonates. An X-ray diffraction study showed that radium plumbate crystallizes in the cubic perovskite structural type. The unit cell parameter (a = 4.303 Å) and crystallographic density (ρ = 10.42 g cm−3) were…
The samples of Cu, Cu2O and CuO nanoparticles were prepared by hydrothermal method at two different reaction intervals of 24 h and 48 h. Samples were characterized by X-Ray Diffraction. UV-Visible spectroscopy was used to study its optical properties. The XRD results confirmed presence of three different phases Cu, Cu…
Co-sintering was carried out in air at 1350°C for 1 hr to make two types of symmetrical 3-layered laminates. One is PDP (Porous alumina/Dense alumina/Porous alumina) laminate and another is DPD laminate. For the porous alumina layer, the porosity was set to be 20%; however, pore size was changed by adding three sizes…
A theory of general solutions of plane problem is developed for the coupled equations in plane elasticity of one-dimensional (1D) hexagonal quasicrystals (QCs), and three general solutions are presented by an operator method. These solutions are expressed in terms of a displacement function, which satisfies a sixth-or…
Transmission electron microscope (TEM) and scanning transmission electron microscope (STEM) observations were carried out to investigate microstructure formation and variant selection process in L1 0 -type ordered CoPt alloy upon a two-step ordering heat-treatment. The first step corresponds to nucleation process carr…
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We report first principle calculations on the structural, electronic and magnetic properties of antiperovskite Fe3AC; A = Al, Ga and In. Calculations show that these compounds are more stable in the magnetic states, the estimated equilibrium lattice parameters (a and V) are in agreement with the experimental data. Fro…
A fast preparation of prickly copper quinoline sulfate spherical superstructures is reported. The superstructures were obtained based on a simple coordinative reaction between CuSO4 and quinoline (q) in a water–methanol system without assistance of any surfactant or template. The obtained spherical superstructures wer…
A three-level Box-Behnken design was employed in doping optimization of polypyrrole with toluenesulfonic acid (TSA-doped PPy). The material was synthesized via chemical oxidative polymerization using pyrrole, toluenesulfonic acid (TSA) and ammonium persulfate (APS) as monomer, dopant and oxidant, respectively. The cri…
Magnesium production by Pidgeon process has been developed very fast in China since 1990's. The waste slag from magnesium production has attracted broad attention because the huge amounts of the slag. For each ton of magnesium produced, there will be 6-8 tons of the slag generated. A big part of the Mg slag exists as…
不同形貌 Er, Yb
This article reports on the optical absorption and photoluminescence analysis of different concentrations of Dy3+ ions doped cadmium bismuth borate (CdBiB) glasses prepared by melt quenching method. The emission spectra of Dy3+: CdBiB glasses have shown a yellow emission at 574 nm (4F9/2 → 6H13/2). The emission intens…
A short-range force constant model was applied to investigate the phonons in wolframite ZnWO_4 crystals in their monoclinic phase having space group P2/c and symmetry C_{2h}. The normal symmetry coordinates for the monoclinic wolframite were computed. The zone center phonons were calculated by using 8 stretching and 6…
In this paper, the technological conditions for preparation of magnesium hydroxide from ammonium chloride by circulation method are presented. The ammonia gas was prepared via treating carbide residue with ammonium chloride and subsequently passed into the magnesium chloride solution to form the magnesium hydroxide an…
The poor bioavailability of Copper (Cu) has resulted in high excretion rate of Cu in the faeces of animals. Regardless of inclusion level, the major part of Cu (70-90%) is excreted and its effect on soil microorganisms, plants and aquatic species is today one of the crucial environmental concerns (Gonzales-Eguia, 2009…
Dendralenes, acyclic cross-conjugated polyenes having a nonplanar structure, containing 1,3-dithiole (DT) rings are of considerable interest as novel multi-stage redox systems for potential application to electrical conducting, magnetic, electrochromic, and nonlinear optical materials. In the present review, we focus…
Based on density functional theory of first-principle theory, we systematically investigate the electronic structure and optical property of V-, N- monodoping and V-N codopiong and compare with pure ZnO. The results show that the absorption in the visible light region is enhanced for the doped system, especially for V…
Solar thermoelectric conversion is another way to convert solar radiation directly into electricity besides photovoltaic technology, and has become a new hot spot of solar energy utilization in recent years. In this paper a model of flat-panel thermal concentrated solar thermoelectric device is built based on the mate…
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