Materials Literature
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A model for the cathode catalyst layer (CCL) performance in a DMFC is developed. The electrochemical mechanism of methanol oxidation reaction (MOR) on the cathode side is assumed. Numerical solution shows that at small currents, MOR dominates in a narrow domain (virtual anode) close to the membrane, while the oxygen r…
Herein, red lead (Pb3O4) is firstly reported to be able to degrade organic pollutants efficiently and simultaneously fix CO2 in aqueous solution under visible light irradiation. CO2 bubbling accelerates both the organic contaminant decomposition and the CO2 fixation. Pb3O4 was partially transformed to Pb3(CO3)2(OH)2 o…
Metallic nanoparticles such as gold and silver are known to exhibit localized surface plasmon resonance (LSPR). Being able to form well defined nanoassemblies of metallic nanoparticles in solution phase can produce LSPR coupling and shift, which represents a unique plasmon signature and have been used for the detectio…
We study primary and secondary reactions induced by 600 MeV proton beams in monolithic cylindrical targets made of natural tungsten and uranium by using Monte Carlo simulations with the Geant4 toolkit [1–3]. Bertini intranuclear cascade model, Binary cascade model and IntraNuclear Cascade Liège (INCL) with ABLA model…
X-ray crystallography is extensively used to determine the atomic structure of proteins and their cofactors. Though a commonly overlooked problem, it has been shown that structural damage to a redox active metal site may precede loss of diffractivity by more than an order of magnitude in X-ray dose. Therefore the risk…
The idea of adding reinforcing materials, or fillers, to polymers has been around for many decades. The reason for the creation of polymer composite materials came about due of the need for materials with specific properties for specific applications. For example, composite materials are unique in their ability to all…
CONTEXT: Elevated expression of the folate receptor (FR) occurs in many human malignancies. Thus, folate targeting is widely utilized in drug delivery purposes specially using nano-radioactive agents. AIMS: In this work, we report production and biological evaluation of gallium-67 labeled superparamagnetic iron oxide…
The paper presents the results of research on low cycle fatigue life of GX12CrMoVNbN9 – 1 (GP91) cast steel at the temperature of 550 °C. The cast steel under investigation was in the as-received condition (after heat treatment) and after 8000 hours of ageing at the temperature of 600 °C. Cyclic loads were realized at…
First-principles calculations have been used to study the structural and electronic properties of BaS1–xSex ternary alloy using full-potential muffin-tin orbital’s (FP-LMTO) method within density functional theory (DFT). In this approach, the local-density approximation (LDA) and generalized gradient approximation (GG…
This paper presents the optimization process in sol-gel technique to synthesize Titanium dioxide (TiO 2 ) thin films using in-house Nano-TiO 2 powder. Nano-TiO 2 powder was previously synthesized in our lab from ilmenite which is a tin mining byproduct using a modified hydrothermal method. By varying the mass of Nano-…
A new class of 3D adamantane-based aromatic framework (AAF) with diamond-like structure was computationally designed with the aid of density functional theory (DFT) calculation and molecular mechanics (MM) methods. The hydrogen storage capacities of these AAFs were studied by the method of grand canonical Monte Carlo…
The oxidation behavior of a superalloy with the chemical composition (wt.%) of Al 5.5-Ti 2.6-Co 4.8-Mo 3.9-W 5.0-Cr 11.0-Ni bal at 850°C and 950°C in air has been investigated. The kinetics curves of the oxidation were measured by thermal gravimtric analysis (TGA), and the microstructure and the elements distribution…
Synthesis of MgAl 2 O 4 from a stoichiometric mixture of aluminum and magnesium nitrates by its burning with urea, glycine, sugar, and mixtures of these as a fuel was studied.
Photon Correlation Spectroscopy is used to study the AOT microemulsion with and without NaCl. Collective diffusion coefficient was investigated by Photon Correlation Spectroscopy technique. We have studied effect of charge on dynamic of water-in-oil microemulsion (nano-droplet of water to the oil), which stabilized by…
Poly(ethylene glycol) (PEG) functionalized single-walled carbon nanotubes (SWCNTs) were covalently grafted on the titanium surface with the aim to provide a new platform for human osteoblast cells (HOCs) attachment. Water contact angle, X-ray photoelectron spectroscopy (XPS), and atomic force microscopy (AFM) results…
The objective of this work is to analyze the incidence of the time superior harmonics over the characteristics of a motor behavior. For this purpose, a computer program in Matlab was made, and it was possible, for different voltage supply waves, by the Fourier Series Analysis, to find the incidence of each harmonic ov…
Hydroxyapatite (HAp) nano-particles were synthesized by a hydrothermal process under different initial pH conditions (pH 9.00∼10.50). All resulting particles were identified to be single-phase HAp. With increasing of initial pH values, Ca/P molar ratios increased closely to that of the stoichiometric HAp value of 1.67…
The hydration of Portland cement plus calcium aluminate cement (PAC) was investigated at 0 °C, 5 °C, 10 °C and 20 °C for its setting times and compressive strength using X-ray diffraction(XRD), thermal analysis(DTA-TG) and environmental scanning electron microscopy(ESEM). It was found that the 3-day compressive streng…
The inhibition of Na(+)/K(+) -ATPase by versatile steroid-like compounds contributes to the putative therapeutic effects of many Chinese medicinal cardiac products via the same molecular mechanism triggered by cardiac glycosides. Five major steroid-like compounds, antcin A, B, C, H, and K were isolated from Niuchangch…
We report the enhanced electrical conductivity properties of single gold-peapodded amorphous silica nanowires synthesized using microwave plasma enhanced chemical vapor deposition. Dark conductivity of the gold-peapodded silica nanowires can be adjusted by controlling the number of incorporated metal nanoparticles. Th…