Materials Literature
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To determine if carbon-based materials can be used for hydrogen storage, we have studied hydrogen chemisorption in single-walled carbon nanotubes. Using atomic hydrogen as the hydrogenation agent, we demonstrated that maximal degree of nanotube hydrogenation depends on the nanotube diameter, and for the diameter value…
In recent years, a lot of research activity has focused on the synthesis of new ordered porous materials by utilization of porous matrices as templates. Since the matrices are themselves created by templating procedures, the entire process can be envisaged as “repeated templating”. This review describes recent concept…
LiBH4 is a complex hydride and exhibits a high gravimetric hydrogen density of 18.5 wt %. Therefore it is a promising hydrogen storage material for mobile applications. The stability of LiBH4 was investigated by pcT (pressure, concentration, and temperature) measurements under constant hydrogen flows and extrapolated…
Cylindrical colloidal-silver-impregnated ceramic filters for household (point-of-use) water treatment were manufactured and tested for performance in the laboratory with respect to flow rate and bacteria transport. Filters were manufactured by combining clay-rich soil with water, grog (previously fired clay), and flou…
We consider a graphene bilayer with a relative small angle rotation between the layers--a stacking defect often seen in the surface of graphite--and calculate the electronic structure near zero energy in a continuum approximation. Contrary to what happens in an AB stacked bilayer and in accord with observations in epi…
The title compound, [Fe(3)(C(8)H(8)N(2)O)S(2)(CO)(8)], was prepared by the direct reaction of Fe(3)(CO)(12) and 5-meth-oxy-1H-benzoimidazole-2-thiol in tetra-hydro-furan. Desulfurization took place readily to form a sulfide carbonyl cluster. The mol-ecule contains a triangle consisting of three Fe atoms capped by two…
Abstract The reaction of LiGaH 4 with an excess of the hydrochloride of a primary amine RNH 2 in ether solution yields in [(RH 2 N) 2 GaH 2 ]Cl (R = Me, 1 , or i Pr, 2 ) additional examples of cationic gallane derivatives. The cation [( i PrH 2 N) 2 GaH 2 ] + reacts further with LiGaH 4 , also in ether solution, with…
Effect of Pb substitution on the amorphous-crystalline transformation temperature, optical band gap and crystalline structure of Ge2Sb2Te5 has been studied. In Pb:GeSbTe chalcogenide films prepared by thermal evaporation, an amorphous to crystallization transition is observed at 124, 129, 136 and 138 °C in Pb0Ge20Sb24…
Fe2-xYxW3O12 powder has been synthesized by the citrate sol-gel process. A model was proposed to calculate the concentration of species in a citric solution. The calculated results could provide valuable information for determining the optimal molar ratio of cation to citric acid and pH value of solution for Fe2-xYxW3…
Monte Carlo simulations show that copolymers with uniformly (or periodically) distributed sticky comonomers collapse "cooperatively," abruptly forming a compact intermediate comprising a monomer shell surrounding a core of the aggregated comonomers. In comparison, random copolymers collapse through a relatively less-c…
Abstract Classical molecular dynamics simulations have been used to investigate the absorption and diffusion behavior of polyethylene (PE) chains on the surface of the side‐wall of the carbon nanotube (CNT). Different degrees of polymerization from 50 to 80 at separate temperatures of 300, 400, 500, and 600 K are cons…
Abstract Poly(phenylene sulfide)/ferrosoferric oxide composites (PPS/Fe 3 O 4 ) with various loading levels were prepared by melt compounding. The microstructure of composites was investigated using SEM and XRD. The rheological, electrical and magnetic properties were characterized respectively by the parallel plate r…
After years of research into colossal magnetoresistant (CMR) manganites using bulk techniques, there has been a recent upsurge in experiments directly probing the electronic states at or near the surface of the bilayer CMR materials ${\mathrm{La}}_{2\ensuremath{-}2x}{\mathrm{Sr}}_{1+2x}{\mathrm{Mn}}_{2}{\mathrm{O}}_{7…
The crystallization process of natural rubber by orientation can be a consequence firstly by the stretching of sample (stress-induced) and secondly by a variation of temperature of the stretched sample (temperature-induced). It is possible to demonstrate these two ranges separated by DSC-calorimetry if the heating of…
The coupling between surface plasmon polaritons and confined acoustic vibrations in embedded silver nanoparticles is studied both theoretically and experimentally. The inelastic light scattering spectra simulated assuming deformation potential and surface orientation mechanisms are quantitatively compared to Raman mea…
The expansion of surface tension into an additive series of terms due to the intermolecular forces, originally introduced by Fowkes , is firstly discussed. Based on this expansion, a survey is given on the analytical methods to determine the terms by means of contact angle measurements. An examination on these methods…
The currents measured in oxidized low-density polyethylene after a dc step voltage excitation show maxima in the range of minutes to hours for temperatures between 20 °C and 80 °C and for field strengths between 20 and 200 kV/cm. The current maxima are shifted to shorter times by increasing the field strength or the t…
We have studied the structural and electrical properties of several glass nanocomposite systems. The formation of nanowires, nanoparticles, and nanorods embedded in heat‐treated x Ag 2 O–(1− x )MoO 3 ( x =0.2, 0.3, and 0.4) glass matrix and the growth of α‐AgI nanocrystals and ZnO nanoparticles in the 0.7AgI–0.15Ag 2…
Embryos of different developmental stages and newly hatched juveniles of the freshwater snail Biomphalaria glabrata were investigated by synchrotron radiation micro computer tomography (SRµCT). Because this method is sensitive for objects with a high X-ray density, it is ideally suited to study mineralized tissues wit…
Glycines are spontaneously adsorbed to form into self-assembled nanoclutsers on single-walled carbon nanotubes (SWNTs). After formation of glycine nanoclusters on SWNTs, the field effect transistor (FET) devices show selective sensing ability to alcohols, such as isopropyl alcohol (IPA), methanol, and ethanol. Upon th…