Materials Literature
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While the main goal of the first part of this study was to check the applicability of the Tsai–Hill equation to a polymer-polymer microfibril reinforced composite (MFC), in which the reinforcing elements represented microfibrils with a diameter around 1–3 μm and aspect ratio of about 100, in the present paper a simila…
Electrochemical behavior of the oxygen reduction reaction on La 0.72 Sr 0.18 Mn O 3 ∕ Y 2 O 3 - Zr O 2 (LSM/YSZ) composite and Gd-doped Ce O 2 (GDC)-impregnated LSM electrodes was investigated in the absence and presence of a Fe-Cr alloy at 900 ° C in air. The results indicate that for the O 2 reduction on the LSM-bas…
We perform molecular dynamics simulations of azobenzene containing side-chain liquid crystalline polymer subject to an external model field that mimicks the reorientations of the azobenzenes upon irradiation with polarized light. The smectic phase of the polymer is studied with the field applied parallel to the nemati…
Freeze-drying was used to prepare nanocrystalline powders of , , with high-purity and crystallite sizes in the range . These powders were used to obtain ceramic samples with in average diameter by firing at , without sintering additive, and for samples sintered at , with previous addition of cobalt nitrate solution to…
High aspect ratio (>500), neat poly(ethyl 2-cyanoacrylate) nanofibers were synthesized catalytically by vapour phase polymerization under high relative humidity and ambient conditions.
An aqueous route for producing nanopowders of intermetallic compounds is presented.The method was developed to produce powders of PrPt 2 and CePt 2 for use as anode electrocatalysts in porous direct ethanol polymer electrolyte membrane ͑PEM͒ fuel cell anodes.Powders that are relatively pure with average particle diame…
The adsorption of cationic and anionic collectors on the surface of smithsonite was studied using diffuse reflectance FTIR (DRIFT) and X-ray photoelectron spectroscopy (XPS or ESCA) techniques.
Poly(amidoamine) (PAMAM) dendrimers of different generations with carboxyl, acetyl, and hydroxyl terminal groups and a folic acid (FA)-dendrimer conjugate were separated and analyzed using reverse-phase high performance liquid chromatography (HPLC). Analysis of both the individual PAMAM derivatives and the separation…
The exact nature of the relationship between high-density (HDA) and very-high-density (VHDA) amorphous ice is unknown at present. Here we review the relation between HDA and VHDA, concentrating on experimental aspects and discuss these with respect to the relation between low-density amorphous ice (LDA) and HDA. On co…
Physical models are presented for single- and multi-wall carbon nanotubes. The models are used to quantify the performance enhancements that they can potentially offer if used as interconnects in GSI chips. For short lengths, mono-layer SWCN interconnects can lower capacitance by 50% whereas for long lengths SWCN-bund…
New fluorovinylene aromatic ether polymers, possessing dual reactivity, have been successfully prepared via the step-growth polymerization of commercial bis(trifluorovinyl) aromatic ethers and bisphenols.
The hydrothermal reaction of 5-hydroxyisophthalic acid (H3L) and lead and nickel nitrates produced a heterometallic polymer [Pb6Ni(mu3-OH)8(La)2]n containing heptanuclear [Pb6Ni(mu3-OH)8]6+ units and a homometallic complex {[Pb(Lb)(H2O)].(H2O)0.25}n consisting of one-dimensional lead-oxide chains: evidently, the La an…
Phosphonated porphyrin frameworks that are porous to an electron-accepting perylenediimide are systematically interdigitated with a phosphonated form of the diimide to form bulk heterojunctions. When employed in photovoltaics, these molecularly interlaced heterojunctions provide large junction areas while retaining th…
The historical understanding of polyphase silicon nitride, abbreviated throughout as SiN, has been a multidisciplinary effort that contributed to the sophistication of Ceramic Science over the last 50 years. This understanding and the development of SiN leading to significantly improved properties has been linked by u…
Optimizing endothelial cell growth and adhesion on the surface of metallic stents implanted in the vascular system is a fundamental issue in understanding and improving their long-term biocompatibility. The ability of the endothelial cell to attach and adhere to the luminal stent surface as well as the capacity to wit…
Assemblies of gold nanoparticles in an organic medium have been synthesized to study the plasmon–plasmon interactions amongst the gold nanoparticles. A pH-sensitive biomolecule, glutathione (GSH), has been introduced as a molecular linker of the ‘parent’ gold nanoparticles to obtain small nanoparticle aggregates. The…
The liquid crystalline (LC) properties of two series of non-symmetric dimesogenic compounds consisting of cholesterol and ring-fluorinated azobenzene mesogenic moieties interconnected by ω-oxyalkanoyl spacers of varying length are compared; one series (F-AOC-n) has the octyloxy tail attached to the fluorinated azobenz…
Low-crosslinked poly((meth)acrylic acid-co-divinylbenzene-80) microspheres with diameters of 0.2–0.9 µm were prepared by precipitation copolymerization and distillation–precipitation copolymerization in neat acetonitrile or an acetonitrile–toluene mixture. All the microspheres prepared possessed excellent spherical sh…
Des fibres de cellulose dotees de conductivite electrique ont ete fabriquees en deposant du polypyrrole sur la surface des fibres. Non seulement une fonctionnalite nouvelle a-t-elle ete impartie aux fibres de pâte, mais l'aptitude au traitement du polymere conducteur intrinseque s'est beaucoup amelioree. Nous avons ca…
The position of steel as the most widely used material in the shipbuilding industry originates from the superior mechanical properties and low manufacturing costs The increasing demands for lowering the weight of different ships due to the increase of their sizes or generally increasing the payload, the application of…