Materials Literature
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Abstract Nanocomposites of recycled poly(methyl methacrylate) (PMMA) and both natural (Nanomer PGV MMT), and organically modified Nanomer I44P, Nanomer I30P and Cloisite 30B montmorillonites (O‐MMT) were prepared by solution dispersion method with the use of two miscible solvents, followed by melt intercalation proces…
Abstract This work was designed to study the effects of inorganic calcite powder on structurally different copolymer [poly(propylene‐ co ‐ethylene)] and terpolymer [poly (propylene‐ co ‐ethylene‐ co ‐1‐butene)] matrices and the possibility of making a suitable porous composite film. The yield stress of the composites…
A 300kW class molten carbonate fuel cell (MCFC)/gas turbine combined compact system has been designed; the system has a 250-cell MCFC stack and a turbocharger generator (TCG) as part of its gas turbine. The 250-cell stack had trouble with a gas leakage; thus, a modified 125-cell stack was refabricated and operated in…
Abstract Carboxymethyl polyvinyl alcohol (CMPVA) was prepared by introducing carboxymethyl groups to polyvinyl alcohol (PVA) with chloroacetic acid. Graphite nanosheets (NanoG) were obtained by treating expandable graphite at a high temperature in a muffle furnace, and then sonicating it in an aqueous ethyl alcohol so…
The electron carrier menaquinone is one of many important bacterial metabolites that are derived from the key intermediate chorismic acid. MenF, the first enzyme in the menaquinone pathway, catalyzes the isomerization of chorismate to isochorismate. Here, an improved structure of MenF in a new crystal form is presente…
Neutron powder diffraction data for the Li-containing perovskite (Nd7/12Li1/4)TiO3 is compared to simulated patterns, showing that structural refinement should use a ∼4000 atom, 14ap × 28ap × 2ap supercell. To form the nano-checkerboard, periodic phase separation must therefore be occurring throughout the bulk powder…
We have carried out a comprehensive study of the transport and thermodynamic properties of ${R}_{1\ensuremath{-}x}{\mathrm{Ca}}_{x}\mathrm{V}{\mathrm{O}}_{3}$ ($R=\mathrm{Pr}$, Sm, and Y), obtaining detailed information on the nature of the insulator-metal transition induced by Ca doping. The behavior of the electroni…
Starch-based extruded foams are in demand for many industrial applications because starch is biodegradable, inexpensive, and readily available in abundant quantity. In this study, the production of starch-based extruded foams using supercritical fluid extrusion (SCFX) having thermal properties such as heat capacity, t…
Hybrid quantum and molecular mechanical calculations have been used to investigate the nucleation and growth of copper clusters on the (0001)-Zn polar surface of ZnO. Our method is based on the embedded molecular cluster approach developed to study point defects in polarizable ionic solids, where we make use of the ch…
Nanostructured silica-titania composites (STC) synthesized with varying pore sizes (45, 134, and 299 angstroms) were tested for the removal of methanol from a humid air stream. The STC pellets were characterized for surface area and pore size distribution and tested in a packed-bed photocatalytic reactor for methanol…
In this paper, we describe the principle of the three-dimensional vector holograms formed in anisotropic recording medium. The polarization states of the interference light are three-dimensionally modulated due to both the polarization interference and optical anisotropy in the recording medium. The electric field of…
Density functional theory has been used to study the electronic spin-state properties of low-spin Fe[HB(pz)3]2, high-spin Fe[HB(3-Mepz)3]2, high-spin Fe[HB(3,5-Me 2pz)3]2, and high-spin Fe[HB(3,4,5-Me 3pz)3]2 complexes that exhibit very different iron(II) electronic spin-sate crossover behaviors with changing temperat…
Abstract The synthesis and characterisation of the complex [Fe II ( L ) 2 ](ClO 4 ) 2 [ L = S ‐(4‐{[2,6‐(Dipyrazol‐1‐yl)pyrid‐4‐yl]ethynyl}phenyl) ethanethioate] carrying both a spin‐transition core and acetyl‐protected terminal thiol groups is described. The compound exhibits a reversible, thermally driven solid‐stat…
The pressure dependences of the lattice parameters of two spin transition compounds have been derived from neutron powder diffraction measurements at ambient temperature. The study of Fe(PM–AzA) 2 (NCS) 2 [PM is N -2′-pyridylmethylene and AzA is 4-(phenylazo)aniline] has been used to validate this new type of investig…
Abstract Flax fiber was modified through grafting of binary vinyl monomers mixtures such as methyl methacrylate (MMA)/vinyl acetate (VA), MMA/acrylamide (AAm), and MMA/styrene (Sty) under the influence of microwave radiations. 24.64% grafting was found at 210 W microwave power under optimum reaction conditions. Graft…
Bacteriochlorins absorb strongly in the near-infrared spectral region and hence are ideally suited for diverse photomedical applications, yet naturally occurring bacteriochlorins have limited stability and synthetic malleability. A de novo route has been exploited to prepare synthetic bacteriochlorins that bear a gemi…
A Pt/Mg 0.59 Zn 0.41 O Schottky photodiode on a ZnO single crystal is reported. The Mg 0.59 Zn 0.41 O film was deposited on a ZnO single crystal substrate by an RF magnetron sputtering method. The optical bandgap of the Mg 0.59 Zn 0.41 O film obtained from the spectral transmittance and reflectance, was 4.6 eV. The fa…
Abstract Banana fiber, which is rich in cellulose, relatively inexpensive, and abundantly available, has potential for polymer reinforcement. This study explores the merits of combining high‐modulus glass fibers with banana fiber in phenolic resoles to develop high‐performance, cost‐effective, lightweight hybrid compo…
We measured the conductance fluctuation of bilayer and trilayer graphene devices, which were prepared on mechanically exfoliated graphene by an all-dry, lithography-free process by using an ultrathin quartz filament as a shadow mask. Reproducible fluctuations in conductance as a function of applied gate voltage or mag…
Beam splitting of low-contrast rectangular gratings under second Bragg angle incidence is studied. The grating period is between lambda and 2lambda. The diffraction behaviors of the three transmitted propagating orders are illustrated by analyzing the first three propagating grating modes. From a simplified modal appr…