Materials Literature
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Magnetic mesoporous carbon composites with high surface areas and narrow mesopore size distributions were directly replicated from SBA-15 by a simple co-casting method and the amount of incorporated magnetic particles and saturation magnetization value can be easily tuned by changing the added amount of iron source du…
An unusual intermediate-spin electronic structure d(xz,yz)(3)d(xy)(1)d(z(2))(1) has been assigned to the six-coordinate saddled [Fe(OETPP)(4-CNPy)(2)](+) complex through density functional calculation and NMR spectroscopy analysis.
In this study we have evaluated the biosynthesis of spherical and narrow dispersed silver colloidal nanoparticles by fungus Fusarium oxysporum and the effects of processing variables such as time of reaction, biomass and Ag+ ions concentration in the reaction mixture on synthesised silver nanoparticles. The morphology…
We report magnetic susceptibility measurements on nonmagnetic impurity-doped multiferroic CuFe 1- y Ga y O 2 with 0 ≤ y ≤ 0:08. The temperature versus Ga concentration magnetic phase diagram was obtained. Comparing the presently obtained phase diagram of CuFe 1- y Ga y O 2 with that of CuFe 1- x Al x O 2 , we find tha…
Nanostructured ZnO nanorods on gold (Au) coated silicon (Si) surfaces were made by solution method immerse technique, using (ZnNO3)2/HMTA at 80° C. The seed surfaces of Au were sputter‐coated on Si <100> substrates, in which Au thicknesses were affected by current and sputter‐coating time. The morphology of the prepar…
A bench work study was carried out to investigate the use of kaolinitic clay containing 29.4% Al2O3 extremely abundant in Saudi Arabia for the production of pure alumina by calcination at 700oC for 1h (recommended by previous investigators) then leached by hydrochloric acid. The effects of leaching temperature (25oC t…
The fabrication of inflated Layer-by-Layer (LbL) microcapsules with a unique ‘bead-in-a-capsule’ morphology is presented. Currently, the fabrication of LbL microcapsules using conventional aqueous LbL techniques usually results in microcapsules with a two-phase system (LbL capsular wall with an air, liquid, solid or h…
The segmented flow technique is used for continuous synthesis of ZnO nanoparticles under micro reaction conditions. The experimental setup consisted of syringe pumps and T-type injectors, PTFE tubings as well as PTFE knot mixers in a thermostated bath. ZnO nanoparticles were obtained by generation under strong alkalin…
An elusive chemical contribution to SERS is investigated by estimating the chemical coupling strengths through a dynamic relative peak analysis during solvent evaporation from a diluted chemical sample that is drop-deposited on a soft SERS substrate.
This thesis focuses on performance, reliability and degradation in solid oxide fuel cells (SOFC), which currently represent the three key technical challenges for the deployment of this technology. By its development of dedicated modeling and experimental tools, this thesis offers a new access to, and comprehension of…
Ferroresonant oscillations involving voltage transformers (VTs) may be initiated by transient events such as switching operations or intermittent faults. In the present article the problem of ferroresonance involving HV VTs is demonstrated with a particular stress on inductive voltage transformers. ATP/EMTP simulation…
The investigation of thermally induced dehydrogenation of LiBH(4) catalyzed by carbon-supported Pd nanoparticles (Pd/C) reveals that LiBH(4) doped with the Pd/C catalysts shows superior dehydrogenation performance, compared to dehydrogenation in the absence of catalyst, even at very low catalyst content. We have found…
BACKGROUND: Polyhydroxyalkanoates (PHA) are synthesized by many bacteria in the cytoplasm as storage compounds for energy and carbon. The key enzymes for PHA biosynthesis are PHA polymerases, which catalyze the covalent linkage of 3-hydroxyacyl coenzymeA thioesters by transesterification with concomitant release of Co…
The nematic liquid crystal (LC) 4-n-pentyl-4'-cyanobiphenyl (5CB) was encapsulated as spherical microdroplets dispersed in solid organically modified silica matrices (ORMOSIL), obtained by the sol-gel method. The organic functional groups used to modify the matrix were methyl, ethyl and propyl. The amount of the organ…
The electrochemical quartz crystal microbalance (EQCM) was used to study the electrosyntheses and electrochemical properties of two kinds of polyaniline (PANI)-thiol composite films in aqueous solutions, which were prepared by covalent binding of a thiol to the oxidized forms of PANI (PANI(post)-thiol, protocol A), an…
We present a nanocolumnar structure anisotropic indium tin oxide (ITO) film deposited at different oblique angles by a radio-frequency magnetron sputtering system. Three dominant diffraction peaks were observed. The location of peaks SnO 2 ( 110 ) , In 2 O 3 ( 222 ) , and In 2 O 3 ( 400 ) increases from 29.39, 31.34,…
To describe the behavior of a 2D electron near a graphene edge, one needs to know the boundary conditions for the effective (envelope) wave function, which obeys an equation of the Weyl–Dirac type. These conditions, which are deduced from general arguments, amount to a linear relation on the components of the spinor c…
Evolution of dendrite morphology in Fe-base alloys was simulated by using the phase-field method and complexity of the dendrite morphology was evaluated by fractal dimensions and dimensionless perimeter of dendrites. It was shown that the both parameters of the fractal dimension and the dimensionless perimeter are eff…
In this paper we present a facile method for the novel production of surfactant-stabilized aqueous dispersions of tris(8-hydroxyquinoline) aluminium(III) (Alq3) nanoparticles. The nanoparticles are spherical, less than 10 nm in mean diameter, and highly fluorescent. We demonstrate the potential scope of these water-ba…
Detonation nanodiamond particles can be formed a gel with ionic liquids, which can easily be fabricated. The imidazolium bromide-functionalized nanodiamond particles are dispersed in ionic liquids with uniform size-distribution.