Materials Literature
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We present a simple method to increase the conductance of individual template-grown carbon nanotubes contacted with platinum electrodes using a high-bias treatment process which decorates the nanotubes with Pt nanoclusters. The temperature dependence of conductance of the modified carbon nanotubes follows very closely…
A technique that employs a single laser beam is proposed for recording the retardance of an optical anisotropic object. The retardance pattern is converted into a polarization pattern using a quarter-wave plate and recorded on a polarization-sensitive medium. The recording medium is illuminated by homogeneous polarize…
As part of a continuing study of oxyfluorotellurates(IV), materials likely to present interesting nonlinear optical properties, two new phases, titanium(IV) tellurium(IV) trioxide difluoride, TiTeO(3)F(2), and divanadium(IV) ditellurium(IV) heptaoxide difluoride, V(2)Te(2)O(7)F(2), have been characterized and present,…
The physical behavior of polyelectrolytes at solid-liquid interfaces presents challenges both in measurement and in interpretation. An informative, yet often overlooked, property that characterizes the equilibrium organization of these systems is their membrane or rest potential. Here a general classification scheme i…
We have proposed a Hamiltonian that takes into account both Na-Na interactions and coupling between Na ions and CoO(2) layers. By a combination of the Monte Carlo and first-principles approaches, all the possible stacking sequences of CoO(2) layers together with the Na ordering have been obtained. In particular, an in…
Abstract The synthesis of nanostructured polyaniline (PANI) with different morphologies by simple alkali‐guided template‐free method followed by doping them with vanadium has been described. The synthesized polyaniline nanoparticles have been well characterized by various techniques. Further, the catalytic activity of…
Crystal violet dye (CV) was studied as a corrosion inhibitor for aluminum in hydrochloric acid (1 mol dm−3) and potassium hydroxide (0.5 mol dm−3) solutions in the temperature range 30°–60°C using the gravimetric technique. The effect of iodide ions on the inhibiting efficacy of CV was also assessed. CV was found to i…
Abstract 8‐Hydroxyquinoline‐5‐sulfonic acid–thiourea–formaldehyde copolymer resins were synthesized through the condensation of 8‐hydroxyquinoline‐5‐sulfonic acid and thiourea with formaldehyde in the presence of hydrochloric acid as a catalyst and with various molar ratios of the reacting monomers. The resulting copo…
Silicone nanospheres containing a variety of functional groups (pyridines, phosphines, thiols, amines, etc.) have been prepared by emulsion copolymerization of methyltrimethoxysilane, MeSi(OMe) 3, and the functionalized monomer of interest, RSi(OMe) 3 . This procedure provides a reproducible synthesis of spherical par…
TiO 2 −ZnO powders in a molar ratio of 92:8 were subject to solution annealing via a reactive sintering route prior to X-ray diffraction and transmission electron microscopic studies. Charge-compensating defect clusters and planar faults predominantly parallel to (121) and (132) planes, analogous to the crystallograph…
Abstract A series of well‐defined allyl‐ether functionalized polyester dendrimers has been synthesized via the divergent approach using traditional esterification reactions. Two commercially available trifunctional thiols, trimethylolpropane tri(3‐mercaptopropanoate) (TRIS) and ethoxylated trimethylolpropane tri(3‐mer…
BaCaB2BFeB16BOB27B hexaferrite particles were prepared using two different techniques namely (i) reverse micelle and (ii) co-precipitation with and without presence of surfactants (cationic, anionic and nonionic). The precipitate was calcinated at 950ËC for 4 hours and characterized by using various instrumental tech…
Reactions of VCl4 with one mol equiv. of L–L (L–L = MeSe(CH2)2SeMe, MeSe(CH2)3SeMe, nBuSe(CH2)2SenBu) in anhydrous CH2Cl2 solution at room temperature give [VCl4(L–L)] as very moisture-sensitive dark purple solids. Using VCl4 and excess selenoether in gently refluxing CH2Cl2 leads to reduction to [VCl3(L–L)] (L–L as a…
Detailed analysis of the spectroscopic properties of the YAlO(3) crystals doped with manganese ions has been performed. The exchange charge model of the crystal field was used to calculate the crystal field parameters and energy levels of the Mn(4+) and Mn(5+) ions in YAlO(3). It was shown that both ions contribute to…
The adsorption and thermal desorption of H(2) and CO on clean and Zn covered Pd(111) surfaces were studied using temperature programmed desorption (TPD), low energy electron diffraction, and Auger electron spectroscopy. The obtained H(2) and CO-TPD results reveal that thick Zn layers (approximately 10 ML) prepared at…
Abstract An organophilic palygorskite (o‐PGS) prepared by the treatment of natural palygorskite with hexadecyl trimethyl ammonium bromide was incorporated into interpenetrating polymer networks (IPNs) of polyurethane (PU) and epoxy resin (EP), and a series of PU/EP/clay nanocomposites were obtained by a sequential pol…
Poly(anilineboronic acid)/phosphate nanoparticle dispersions are produced in high yields using the reactivity of the boronic acid moiety with phosphate in the presence of fluoride. The poly(anilineboronic acid)/phosphate dispersions have been characterized using spectroscopic, microscopic, and electrochemical techniqu…
Mesoporous silicas with large and accessible pores have been successfully synthesized using laboratory-made poly(ethylene oxide)- b -polystyrene (PEO- b -PS) copolymers as templates. The PEO- b -PS copolymers were synthesized using living/controlled radical polymerization. The porous structure (mesopore size, size dis…
Abstract β‐Nucleated isotactic polypropylene (iPP) blends with polyamide 6 (PA6) were prepared with a novel and highly efficient nano‐CaCO 3 ‐supported β‐nucleating agent. Maleic anhydride grafted polypropylene (PP‐ g ‐MA), glycidyl methacrylate grafted polypropylene (PP‐ g ‐GMA), maleic anhydride grafted poly(ethylen…
Magnesium hydroxide [MH] with porous nanoplates were synthesized from boric magnesium fertilizer (MgSO 4 ·7H 2 O), using a large bubbling setup designed by the authors. The regular hexagonal plates of MH with a smaller specific area were formed after hydrothermal treatment. The effects of various operating variables,…