Showing papers in "Materials Chemistry and Physics in 2005"

TL;DR: In this article, a well-dispersed silver nanoparticles were prepared by chemical reduction method, with polyvinyl pyrrolidone (PVP) as dispersant, and the mechanisms of PVP in the preparation process were discussed through the optical characters of the reaction system.

TL;DR: The corrosion behavior of FeCoNiCrCux high-entropy alloys in 3.5% NaCl solution is reported in this paper, and the corrosion resistance has been evaluated using immersion tests and potentiodynamic polarization measurements.

TL;DR: In this paper, the reduction of silver salt in aqueous PVA with SFS is done for the first ever time, and the solutions and the films are characterized by using UV-vis, photoluminescence (PL), FTIR spectroscopy, XRD, SEM, TEM and thermal analysis.

TL;DR: In this article, a simple method to produce silver nanoparticles through AgNO3 chemical reduction in a continuous media is presented, where Aminosilanes act as catalytic reactors and superficial modifiers of Ag nanoparticles, inhibiting their growth and avoiding aggregation.

TL;DR: In this paper, a vertical aligned CuO nanorod arrays on copper electrodes with diameters of ∼5nm and lengths of hundreds of nanometers were synthesized successfully using a simple wet chemical method at room temperature.

TL;DR: The poly(ether-ether-ketone) (PEEK) polymer filled with nano-sized silica or alumina measuring 15-30 nm to 2.5-10 wt.% SiO2 or Al2O3 nanoparticles exhibit the optimum improvement of hardness, elastic modulus, and tensile strength by 20-50%, with the sacrifice of tensile ductility as discussed by the authors.

TL;DR: In this paper, polyaniline (PANI) was synthesized with inorganic acids (HCl, H2SO4 and H3PO4) by using solid-state polymerization method.

TL;DR: In this paper, the effect of pyridine derivatives on the corrosion of carbon steel in 2M HCl solutions has been studied by electrochemical polarization method (potentiodynamic, Tafel extrapolation) as well as weight loss method.

TL;DR: In this article, the authors derived an expression for the effective thermal conductivity of nanofluids with interfacial shells, and compared with conventional models, the expression is not only depended on the thermal conductivities of the solid and liquid and their relative volume fraction, but also depended on particle size and interfacial properties.

TL;DR: In this paper, a method for the coating fabrication is based on the electrochemical deposition of chitosan and electrophoretic deposition of hydroxyapatite (HA) powders.

TL;DR: In this paper, three different routes for HAP powders preparations were investigated and the effect of powder characteristics on the sinterability was investigated, and two powders were prepared by chemical precipitation reactions at 100°C and one by mechanochemical reaction.

TL;DR: In this paper, a reduction of the silver salt in aqueous aniline leads to the formation of silver nanoparticles which in turn catalyze oxidation of anilines to polyaniline.

TL;DR: In this article, Fe-doped mesoporous titanium dioxide nanocrystalline photocatalysts were prepared by the sol-gel method and as-prepared samples were characterized with X-ray diffraction (XRD), XPS and N2 adsorption-desorption measurements.

TL;DR: In this article, a simple method to synthesize size-controlled amorphous selenium nanoparticles by chemical reduction at room temperature was developed, where the particle size control can be achieved by adjusting the key element of this synthetic system, the sodium thiosulfate as the reducing agent with the aid of the surfactant stabilizers.

TL;DR: In this article, microstructural change during the hydrothermal and post-heat-treatments was studied for well-defined sodium contained (i.e., partially ion-exchanged) nanotubes, with nominal composition of ∼H 1.5 Na 0.5 Ti 3 O 7.

TL;DR: In this paper, the formation of nanocrystalline ferrite phase is observed after 3h of milling and its content increases with milling time, and the structural and microstructural evolution of the nanophase have been studied by X-ray powder diffraction and the Rietveld method.

TL;DR: In this paper, a noncovalent modification of multi-walled carbon nanotubes (MWNTs) with the dispersant of sodium dodecyl sulfate (SDS) was fabricated.

TL;DR: In this paper, a cadmium sulfide (CdS) film was prepared by ultrasonic spray pyrolysis (USP) technique onto glass substrates at different temperatures ranging from 473 to 623 K in 50 K steps.

TL;DR: Methylene blue dye (MB) was investigated as a corrosion inhibitor for mild steel in 2-M sulphuric acid solution using gravimetric and thermometric techniques as discussed by the authors, and the inhibition efficiency of MB increased with concentration and synergistically increased in the presence of the halide additives, namely KCl, KBr and KI.

TL;DR: The durability of ground granulated blast furnace slag concretes and the corrosion behavior of reinforced concrete beams under various loading ratios were investigated in this article, where a direct current was applied to accelerate the corrosion process.

TL;DR: In this article, the structure, morphologies, composition, and properties of the as-synthesized SnS and SnS 2 products were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive x-ray spectroscopy (EDS), transmission electron microscope (TEM) and high-resolution TEM (HRTEM), and Raman Spectroscopy, which showed that SnS nanoparticles possessed a multilayer nanostructure with an average diameter of 30-100nm.

TL;DR: In this paper, the hot corrosion behavior of various Fe-Cr, Fe-Al and NiAl model alloys was investigated in air with a surface deposit of NaCl-KCl melt.

TL;DR: In this article, the authors used the normal melt-quench technique to obtain the optical absorption spectra of the glasses with compositions 20MO· x Bi 2 O 3 ·(80− x )B 2 O3 (M = Ba, Sr) with 10−≤− x  Â≤ 60 (in mol%) and measured the optical band gap for indirect allowed and indirect forbidden transitions using available theories The origin of the Urbach energy is associated with the phonon assisted indirect transitions.

TL;DR: Sulfonated polystyrene (PS) microspheres have been used as template to produce hollow polyaniline (PANI) and hollow polypyrrole (PPY) micro-spheres in the size of range 2.2-3.4μm in diameter.

TL;DR: In this article, the microwave synthesized Pt/carbon nanotubes catalysts exhibited higher catalytic activity for methanol electrooxidation at room temperature than a commercial Pt/C catalyst.

TL;DR: In this article, two sulfonated surfactants, dodecylsulfonate (DSO) and DBS, were readily intercalated into MgAl layered double hydroxides (LDHs) using the co-precipitation method.

TL;DR: In this article, the preparation of ultrafine silver powder with chemical reduction method was investigated, where AgNO 3 with ascorbic acid gives polyhedron monodispersed ultrafine Silver powder.

TL;DR: In this paper, a mechanism for the formation of the polyaniline/nano-CeO 2 composite microspheres was proposed, in which the particles were made from a toluene/water emulsion solely stabilized by CeO 2 nanoparticles.

TL;DR: By exploiting the orientation of the polymer methoxy polyethylene glycol (MPEG), directional growth of silver particles has been obtained in the presence of ultraviolet irradiation for the first time.

TL;DR: In this article, the authors investigated the corrosion behavior of N80 tube steel in simulant static solution with carbon dioxide (CO2) and hydrogen sulfide (H2S) at a temperature of 100 °C.