Materials Literature
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An anodic alumina supported 17.9 wt% Ni catalyst shows an excellent catalytic performance during steam reforming of methane at 700°C under W/F = 6.33 × 10–3 g-cat·h/L, even when compared with some commercial Ni and Ru reforming catalysts. This is considered to be the result of the existence of an interfacial NiAl2O4 l…
Cu ( In , Ga ) ( S , Se ) 2 thin films have been prepared using a low cost two-step growth process, which involves the electrodeposition of a Cu ( In , Ga ) Se 2 precursor, followed by annealing in H 2 S atmosphere. From X-ray diffraction results, an expected shift of the (112) reflection with S and Ga incorporation i…
Dielectric constant, dielectric loss tangent, and electrical conductivity were studied as functions of temperature for poly(vinyl alcohol) (PVA) films doped with ammonium metavanadate or polyoxometalate Mo132: (NH4)42[Mo 72 VI Mo 60 V O372(HCOO)30(H2O)72]30HCOONH4·250H2O. The electrophysical characteristics were measu…
A method for fabricating arrays of microcapsules covalently immobilized onto chemically patterned substrates was developed. The core-shell microparticles with poly(allylamine hydrochloride) (PAH) as the outermost layer were obtained by layer-by-layer (LbL) assembly, which were further treated with glutaraldehyde to en…
The state of the surface of standard phosphorus-doped n-Si(111) and n-Si(100) (KEF grade) and boron-doped p-Si(111) (KDB grade) single-crystal wafers treated in a 50% HF–70% HNO3 (1: 3, v/v) polishing solution has been studied using soft X-ray reflection spectroscopy. The fine structure of the reflection spectra in th…
The structural changes of ferroelectric Rb(2)ZnCl(4) have been studied in real time under the influence of pulsed electric fields by high-resolution gamma-ray diffraction close to the lock-in transition at 198.3 K. A well-defined field-induced switching between the incommensurate and the commensurate phase is observed…
In order to develop new materials for biomedical and pharmaceutical applications, interpenetrating polymer networks (IPNs) based on poly(ethylene glycol) methyl ether acrylate (PEGMEA) and gelatin were synthesized. These two materials were cross-linked sequentially using N,N'-methylene bisacrylamide (NMBA) and glutara…
In the present article, underpotential deposition (UPD) of tin (Sn) onto a polycrystalline gold [Au (poly)] electrode in solution containing is addressed. The in situ modified electrode with Sn-adatoms was utilized for the oxygen reduction reaction (ORR). The results demonstrate that the ORR is inhibited at low overpo…
The ultrahydrophobic, conductive, and porous properties of microporous electrodes (MPEs) are successfully deposited by a reactive ion etcher with the plasma treatment. The electrodes fabricated with plasma exhibit a good water-repellent behavior due to hydrophobic groups such as and groups and the ultrahydrophobic pro…
Performance of two network-on-chip (NoC) topologies is compared for the use in multicore processors. The performance evaluation is supported by the CINSim simulator. This simulator has been developed to model a variety of network topologies that are based on atomic components such as buffers, router
Well-ordered and uniform titania nanoparticle arrays were synthesized using diblock copolymers as structure directing agents. High molecular weight copolymers of polystyrene-b-polyethylene oxide and poly(methylmethacrylate)-b-polyethylene oxide were used to control the distance between titania nanoparticles in the ran…
Oxidation of cyclohexanediol derivatives with 12-tungstophospholic acid-hydrogen peroxide system was investigated focusing on a reaction mechanism in the preparation of dicarboxylic acids from olefin because oxidative cleavage of vicinal diols would be a rate-determining step in oxidative cleavage of carbon-carbon dou…
Multi-walled carbon nanotubes (MWNTs) were synthesized on different substrates (bare Si and $SiO_2$ /Si substrate) to investigate dye-sensitized solar cell (DSSC) applications as counter electrode materials. The synthesis of MWNTs samples used identical conditions of a Fe catalyst created by thermal chemical vapor dep…
It is shown that 2 wt% clay-reinforced nylon and 4 wt% clay-reinforced nylon have similar tensile strengths, which are increased by about 30% compared to those of nylon 6. With an increase in loading rate, the ultimate tensile strength increases for both nylon 6 and nanocomposites, and the ductility decreases for nylo…
Water-soluble CdTe nanocrystals are ultrafast synthesized in less than 10 s via the chemical aerosol flow method.
The influence of inorganic precursors on phase evolution and powder sinterability of YAG has been investigated. YAG powders were synthesised by reverse-strike precipitation, from yttrium and aluminium chlorides or nitrates aqueous solution. The powders were characterised by thermal analysis and XRD measurements. Pure-…
Two samples of calcic bentonite of the Santa Elena Peninsula, Ecuador, were pillared with Al13 ions in the ratio of 10, 15 and 20 meq of Al g-1 of clay, calcinated at 573, 723 and 873 °K and acid activated with 4, 6 and 8 mol L-1 H2SO4. Analyses by X-ray diffraction, X-ray fluorescence, differential and gravimetric th…
We report the enhancement of the electroluminescent property of organic light-emitting diodes (OLEDs) using as a hole injection layer between indium tin oxide (ITO) anodes and -bis[ -(1-naphthyl)- -phenyl-amino]biphenyl . The operation voltage for of OLEDs with a 10 Å thick layer decreased from 24.5 to 14.7 V, and the…
Tin (Sn with 5% of Si by weight) can be used as a liquid substrate to fabricate ZnO/SiO(2) hierarchical nanostructures and self-assemble these three-dimensional nanostructures into a vertical array at the same time.
Proton transport properties of three thin films (110, 240, and 360 nm thick films) on R-plane (1102) sapphire substrates for oligomeric poly[(1, 2-propanediamine)-alt-(oxalic acid)] were investigated. The maximum proton conductivity of the thin film is 1.7 × 10-3 S cm-1 at the RH of 80%, which is five times higher tha…