Materials Literature
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The effects of Ga 3+ and Li + co-doping on the solubility limits and densification behavior of ZnO were examined. When Ga and Li were co-doped at a 1:1 ratio, the overall solubility of Ga and Li increased to approximately 40 at% (20 at% of Ga + 20 at% of Li). The lattice parameter decreased with increasing Ga and Li c…
Based on the research work carried out in our laboratory in recent years, we focus on three categories of rare-earth doped spectral conversion materials, i.e., red phosphor for white-LED lighting, near-infrared downconversion materials and upconversion nanosized biological fluorescent labeling materials. Our work on t…
Hydrothermal syntheses in sealed gold tubes produced four distinct sulfosalts of Pb-Bi-Sb-Au, three of them suitable for crystal structure analysis. They have distinct linear-coordinated Au + sites in the structure. The crystal structure of Au 2 Pb 20 (Sb,Bi) 16 S 45 is composed of two types of rods based on SnS arche…
The problem of superconductivity in an electron system with partly filled sp shell is studied. The scattering amplitudes are determined and the equations of superconductivity are derived from the assumption that the Hubbard energy is the largest energy parameter.
The nanoparticles of Ti and TiO2 have attracted extensive research interest because of their diverse applications in, for instance, catalysis, energy conversion, pigment and cosmetic manufacturing and biomedical engineering. Through this project, a one-step bulk synthesis method of electromagnetic levitational gas con…
摘要： 综述了卟啉微纳米材料合成的制备方法，以及将其作为传感、光电器件等应用的研究进展。 卟啉类化合物是广泛存在于自然界重要的生物分子，其独特的平面骨架和共轭大π结构，使之成为分子组装体系中优良的构筑基元。 制备的卟啉微纳米材料因其良好的光、热稳定性，已被广泛用于分析化学、仿生、催化及材料科学等领域。
Ferroelectric Generators (FEGs) are compact single shot high voltage generators. They consist of a small explosive charge, ferroelectric ceramic, and an output circuit. There has been and continues to be active Small Business Innovative Research (SBIR), University, and Government programs to develop FEGs as very compa…
We present experimental and numerical studies on the enhanced light narrow transmission through cascaded Au/SiO x N y /Au aperture arrays by varying the refractive index and thickness of SiO x N y . It is found that the enhancement as well as narrowing of the optical transmission originates from the coupling role of s…
Carbon nanotubes, carbon nanostructures, and carbon metal composites are grown using microwave plasma–enhanced chemical vapor deposition and laser ablation processes. Iron (Fe), aluminum (Al)-Fe, and nickel (Ni)-Fe films with a thickness of 10 nm are used as catalysts for the growth of these carbon nanostructures (CNS…
Natural steel corrosion of reinforced concrete (RC) structures is a slow process which researchers find necessary to accelerate in laboratory tests to obtain needed damage in a short time. Regrettably, there is no standard procedure for accelerating steel corrosion in RC specimens. Researchers therefore continue to us…
The growing interest for the physicalproperties of graphene and its chernical functionalization is triggering a renewed attention to other more complex forms of sp2 nanostructured carbon, e.g., carbon schwarzites. The structural complexity of these forrns prevents in rnany cases the possibility of ab-initio calculatio…
The in-plane optical anisotropic properties of the non-polar a-plane GaN films grown by metal organic chemical vapour deposition are investigated by using polarised photoluminescence (PL), optical transmission and Raman scattering measurements. Through polarised PL and transmission spectra, the in-plane optical anisot…
Iridium-Rhenium(Ir-Re) thin films were deposited onto the tungsten carbide(WC) molding core by ion beam assist sputtering system. The Ir-Re films were prepared by compound-target sputtering with iridium, rhenium and chromium as the sources. Argon were inlet into the chamber to be the plasma and reactive gases. The Ir-…
The roles of crystallography in the integrity of the parts produced in ultraprecision machining and grinding processes have been quantitatively studied. In ultraprecision machining and grinding the tool geometry features and the process parameters are on the same order of magnitude as the grain size; therefore, the ma…
Gold and cadmium sulphide nanorods with aspect ratios ≈5 were synthesised in quantities of several hundred milligrams via surfactant-driven seed-mediated processes. Such nanorods then underwent surface-modification processes in which the surfactant coating was at least partially replaced with both commercially availab…
The TiO 2 etching characteristics and mechanism in HBr/Cl 2 /Ar inductively coupled plasma (with a fixed bias power of 200 W) were investigated. It was found that the TiO 2 etching rate in Cl 2 /Ar plasma is about 8 times faster than that in HBr/Ar plasma. In both HBr-rich (60% HBr + 20% Cl 2 + 20% Ar) and Cl 2 -rich…
Silver nanoparticles were prepared by reduction of AgNO3 in dilute aqueous solutions of 4-nitroaniline. The effect of 4-nitroaniline concentration on Ag nanoparticles was investigated, and the sensitivity and selectivity of the prepared Ag nanoparticles solution on the presence of melamine in milk were studied. A colo…
This article presents a new correlative model for surface tension of mixtures. This model is an extension of a predictive model recently proposed by our group. Other correlative models were evalu- ated and compared to the proposed model. Hydro- carbons mixtures exhibiting chemical nature or shape and chain size asymme…
In this paper the hardware implementation of producing the voltage pulses of variable duty cycle which are applied at the gate driver terminal of the switching devices used in the converter of a switched reluctance motor have been presented. These voltage gated pulses which corresponds to phase excitation sequence of…
The vibrational frequencies of N-benzoyl glycine in the ground state have been calculated using density functional method (B3LYP) by using 6-311++G(d,p) basis set. Theoretical vibrational spectra have been interpreted by means of potential energy distribution (PEDs) using MOLVIB program. The equilibrium geometry and t…