Showing papers in "Materials Research Bulletin in 2007"

TL;DR: In this paper, a flower-shaped ZnO nanostructures were synthesized by the solution process using zinc acetate dihydrate and sodium hydroxide at very low temperature of 90°C in 30min.

TL;DR: In this article, the thermal conductivity of boron nitride (BN) particulates reinforced high density polyethylene (HDPE) composites was investigated under a special dispersion state of BN particles in HDPE.

TL;DR: In this article, ABO 3 -type perovskite LaFeO 3 nanosized photocatalysts were synthesized by a sol-gel method, using citric acid (HOOCCH 2 C(OH)(COOH) CH 2 COOH).

TL;DR: In this paper, the Eu2+ activated Ba2SiO4 phosphors were synthesized at 1573 K by solid-state reactions under a weak reductive atmosphere and systematically investigated by photoluminescence excitation and emission spectra, diffuse reflectance spectra and concentration quenching process and lifetime.

TL;DR: The magnetic properties of the nanoparticles indicate their strongly interacting nature as mentioned in this paper, and they are superparamagnetic at room temperature, with a super-paramagnetic blocking temperature of 200 K.

TL;DR: A series of ZnO films of different thickness have been deposited on glass substrates using sol-gel technique by varying the number of spin coatings and the effect of film thickness on the structural, electrical and optical properties have been investigated.

TL;DR: The physical and photophysical properties of the catalysts were characterized by X-ray diffractometry, Brunauer-Emmet-Teller surface area and porosity measurements, transmission electron microscopy, Raman spectra, and diffused reflectance spectroscopy as mentioned in this paper.

TL;DR: In this paper, the authors showed that increasing annealing temperature increased the crystallinity of thin films and at 550°C high quality crystalline thin films with grain size of about 37nm were obtained.

TL;DR: In this paper, thin films of nanocrystalline SnS-sub 2 on glass substrates were prepared from solution by dip coating and then sulfurized in H{sub 2}S (H{sub2}S:Ar = 1:10) atmosphere The films had an average thickness of 60 nm and were characterized by X-ray diffraction studies.

TL;DR: In this article, the degradation and mineralization of Butachlor in aqueous solution by nanophotocatalysis using immobilized TiO 2 nanoparticles were investigated.

TL;DR: In this paper, a series of Ce3+-doped phosphate, borate, silicate and germanate glasses were investigated and their optical properties were found to have a Nephelauxetic effect depending on the optical basicity of glasses.

TL;DR: In this article, the photocatalytic properties of nano A2TinO2n+1 (A = Li, Na, K) were prepared successfully by novel hydrothermal synthesis process, which showed that the compositions of lithium, sodium and potassium titanates were Li2TiO3, Na2Ti3O7 and K2Ti8O17, respectively.

TL;DR: In this article, a nanocrystalline forsterite (Mg2SiO4) powder was synthesized using sucrose as a chelating agent and template material from an aqueous solution of magnesium nitrate and colloidal silica.

TL;DR: In this paper, the synthesis of complex ferrite powders with small particle size using a sol-gel route using citric acid to complex the ions followed by an auto-combustion reaction.

TL;DR: In this article, a simple reaction in ammonia solution at 90-180°C was used for the fabrication of micro-flowers composed of nanosheets with tunable size, which showed effective catalytic activity on the decomposition of ammonium perchlorate.

TL;DR: In this paper, ZnO nanorods with diameters in the 80-800 nm range are readily synthesized by the reaction of zinc acetate, ethanol, and ethylenediamine under solvothermal conditions.

TL;DR: In this paper, the effect of high-temperature annealing on structural defects and impurities of well-aligned carbon nanotubes (ACNTs) was investigated.

TL;DR: Amorphous Si (a-Si) thin film anodes were prepared by pulsed laser deposition (PLD) at room temperature as mentioned in this paper, and properties of the thin films were investigated using X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM) and electrochemical measurements.

TL;DR: In this paper, the effect of lanthanum ion substitution for iron on the structural and magnetic properties of Ni-Cu-Zn ferrite was reported, and the Rietveld structure refinement was carried out; La solubility in spinel, residual stress in sintered core, quantity of secondary LaFeO 3 phase formed and change in lattice parameters, etc.

TL;DR: In this paper, a simple and reproducible method for the synthesis of triangular Au core-Ag shell nanoparticles is presented, where the triangular gold core is obtained by the reduction of gold ions by lemongrass extract.

TL;DR: In this article, the insertion of Sm{sup 3+} and Gd{sup 4+} cations into the cobalt ferrite structure has been investigated and X-ray micro-analysis (EDX) shows that the RE contents are close to the nominal ones.

TL;DR: In this paper, the photoluminescence properties of polyvinyl pyrrolidone (PVP) capped cadmium sulphide (CdS) nanoparticles embedded in a PVA matrix have been investigated using optical absorption spectroscopy, X-ray diffraction and transmission electron microscopy (TEM) studies.

TL;DR: In this paper, three types of perovskite powder with the orthorhombic, tetragonal and cubic symmetries were obtained, depending on the reaction temperature and the ratio of KOH/Nb2O5.

TL;DR: In this article, X-ray diffraction and selected area electron diffraction studies confirmed the formation of nanocrystalline cubic phase of ZnS in the films, although the target material was hexagonal znS and the particle size, calculated from the XRD patterns of the thin films was found in the range 2.06-4.86-nm.

TL;DR: In this paper, the influence of different amounts of Mg substitution on the physical properties, microstructure, and sintering behavior of TCP powders was evaluated using thermal analytical techniques, together with X-ray diffraction analysis, to characterize the occurring phase transformations during annealing of the powders.

TL;DR: In this paper, the effect of the content of LiNbO 3 and the sintering temperature on the phase structure, the microstructure and the piezoelectric properties of lead-free ceramics were investigated.

TL;DR: In this paper, the inner cores of the PAMAM dendrimers are hydrophilic and potentially open to calcium ions, since interior nitrogen moieties serve as complexation sites.

TL;DR: In this paper, carbon nanotubes (CNTs) and carbon black (CB) filled powder styrene-butadiene rubber (SBR) composites were prepared by spray drying of the suspension of CNTs and CB in SBR latex.

TL;DR: In this article, a crack-free alumina gel film was fabricated using an alumina sol with a high Al 2 O 3 content and the addition of EAcAc could notably decrease the surface tension of the liquid in the gel pores.

TL;DR: In this article, the authors reported the crystal growth of R2Ir2O7 (R=Pr, Eu) and their structure determinations from single crystal X-ray diffraction experiments at temperatures of 110, 115, and 298 K. The pyrochlore compounds crystallize in a cubic space group F d 3 ¯ m (No. 227, origin choice 2).