Showing papers in "Materials Chemistry and Physics in 2000"

TL;DR: In this article, the authors have described in detail, chemical bath deposition method of metal chalcogenide thin films, it is capable of yielding good quality thin films and their preparative parameters, structural, optical, electrical properties etc.

TL;DR: In this article, the reverse type of indentation size effect (ISE), where the apparent microhardness increases with increasing applied test load, was critically examined for the experimentally reported data for a number of single crystals differing in crystal structure and chemical bond, using the theoretical models reported in the literature.

TL;DR: In this article, the synthesis of nanosized silver particles by chemical reduction using formaldehyde in aqueous solution was studied in which effects of several processing variables such as quantities of alkaline solution and formaldehyde and reaction time were investigated.

TL;DR: In this paper, the recent developments of (Ba,Sr)TiO 3 (BST) thin films for future Gbit era dynamic random access memory (DRAM) applications are reviewed.

TL;DR: In this paper, the sensitivity characteristics of ZnO-based semi-conductor gas sensors to ethanol vapours have been investigated with lanthanum oxide and palladium, and it has been confirmed that these are highly sensitive and selective for ethanol vapour at 175°C in air atmosphere.

TL;DR: In this article, the ion-sensitive field effect transistor (ISFET) was separated into two parts and used as a pH-sensitive membrane for electrode, which is connected with a commercial MOSFET device in CD4007UB or LF356N.

TL;DR: In this paper, the average particle size of the SrAl2O4:Eu,Dy needle-like phosphors was less than 100nm as observed by the transmission electron microscopy (TEM).

TL;DR: In this article, the polarization behavior of Armco iron in aqueous solutions of HCl with and without inhibitors has been studied by the potentiostatic method, and the process of inhibition was attributed to the formation of adsorbed film on the metal surface, that protects the metal against corrosive agents.

TL;DR: In this paper, the electrical resistance change of films doped with different lanthanum concentrations was investigated in the presence of 1.5 vol% ethanol vapour in the air at temperatures varying between 150 and 400oC.

TL;DR: In this paper, the copper sulphide (Cu x S) thin films were deposited using relatively simple and new successive ionic layer adsorption and reaction (SILAR) method using copper sulphate and thiourea solutions as cationic and anionic precursors, respectively.

TL;DR: In this article, the crystal structures and spectra of nano-scale powders of YAG(Y3Al5O12):Ce3+ were studied and the blue-shift peaks in both of the emission spectrum and the excitation spectrum are due to the transition between 5d−4f energy levels.

TL;DR: In this article, the electrochemical properties of Ir-doped polyaniline (PAN) films for the application of electrochemical (EC) capacitors were characterized by their i-E and chronopotentiometric responses in 0.5m H 2 SO 4 and 0.2m IrCl 3 · x H 2 O.

TL;DR: In this paper, a new method to synthesize ultrafine SnO2-TiO2 coupled particles is presented, and coupled particles are synthesized by homogeneous precipitation and characterized by EDS, XRD, TEM, HREM and BET surface area analysis.

TL;DR: In this article, the frequency and composition dependent properties of mixed Li 0.5 Mg x Ti x Fe 2.5 O 4 (where x = 0.4) have been measured at room temperature and the compositional variation of resistivity and dielectric constant indicates the inverse trends with each other.

TL;DR: In this article, Van-der-Pauw's four probe technique was used to measure electrical conductivity (σ), Hall coefficient (RH), carrier concentration (n), and Hall mobility (μH) of the Sb:SnO2 films.

TL;DR: In this paper, the effect of film thickness on optical, structural and electrical properties of thin films of cadmium selenide with different thicknesses was studied. And the shift of 0.5 eV in the optical band gap energy, and a decrease in electrical resistivity from 104 to 103 Ω cm and increase in the grain size of CdSe crystallites from 40 to 80 A were observed when the film thickness was varied from 600 to 2400 A.

TL;DR: In this article, the structural properties of zinc-blende CdS, CdSe, ZnS, and ZnSe are calculated and a good agreement between the calculated and experimental values of the lattice constant, the cohesion energy, and bulk modulus and its derivative are obtained.

TL;DR: In the analysis of growth defects two categories of dislocations are distinguished: (i) growth dislocation which are connected with the growth front, either still during the growth experiment or after growth, e.g. during cooling to room temperature as discussed by the authors.

TL;DR: Barium ferrite BaFe12O19 and its substituted derivatives BaFe9.6Co 0.8Ti0.8M0.9O19 have been prepared from chemical coprecipitated carbonate precursor as mentioned in this paper.

TL;DR: In this paper, the authors showed that Fe(OH)2 precipitates were partially oxidized by H2O2 to ultrafine Fe3O4 powders about 8-10nm in the presence of surfactants.

TL;DR: In this article, the presence of both the phases in composite was confirmed by X-ray diffraction (XRD) and the variation of dielectric constant with frequency in the range 100-Hz to 1-MHz and also with temperature at a fixed frequency of 10-KHz was studied.

TL;DR: In this article, a new route where ceramics are produced by mixture from pre-synthesized spinel and pyrochlore phases with the other classical single oxides additives such as Co, Mn, Cr, Ni, etc.

TL;DR: In this article, the semiconductor-septum (SC-SEP) storage cell is fabricated with the configuration | C | 0.5 m polyiodide | n -Sb 2 S 3 | Ti || 0.1 m Fe(CN) 6 4− /Fe(CN), 6 3− | C|.

TL;DR: In this article, the deformation behavior of two-stage martensitic transformations of B2↔R-phase↔B19′ and B19′ have been clarified for both TiNi binary and ternary alloys.

TL;DR: In this article, the compositional dependence of elastic properties of the binary tellurite glasses in terms of the bulk modules-volume and bond compression model relationships have been achieved The number of bonds per unit volume, the value of the average stretching force constant present in the binary glasses have been calculated in order to discuss the interatomic bonding of network modifiers and network former.

TL;DR: The structure and composition of chromium oxide films formed on stainless steel by immersion in a chromium electrolyte have been studied by SEM and XPS as mentioned in this paper, where the oxide film can be described within the framework of a double layer consisting of a thin outer hydrated layer and an inner layer of Cr2O3.

TL;DR: In this article, synthetic hydroxyapatites (HA) with widely different crystallinity degrees were prepared starting from calcium hydroxide and phosphoric acid, and the powders were carefully characterised by various physico-chemical techniques.

TL;DR: In this article, the authors show that very high conversion efficiencies can still be achieved even making use of low-cost soda-lime glass as substrate, and they describe the methods and the magnetron sputtering techniques used to grow a polycrystalline CdS thin film with a controlled Na content.

TL;DR: In this paper, an extensive investigation on the corrosion behavior and adhesion of TiN-coated AISI 304 steel samples was performed, and the experimental results demonstrate that the corrosion properties of the TiNcoated steel samples are determined first by the influence of the synergetic effect, that is the packing factor and the thickness associated with the coatings, and second by the adhesion strength of TiNs to the substrate.

TL;DR: In this paper, a successive ionic layer adsorption and reaction (SILAR) method for yielding good quality Bi2Se3 films of thickness upto 1.2 mm under a choice of deposition conditions is presented.