scispace - formally typeset
Search or ask a question

Showing papers in "Materials Chemistry and Physics in 1991"


Journal ArticleDOI
TL;DR: In this article, the authors show that carbon dioxide adsorption at temperatures between 173 K and 273 K on metal oxides such as MgO, Fe2O3, TiO2 and ZrO2 produces two types of weakly adsorbed species.

180 citations


Journal ArticleDOI
TL;DR: A survey of binary and ternary metal chalcogenide thin films is given in this paper with respect to their preparative parameters, structural, optical and electrical properties, and the theoretical background of chemical deposition is described in detail.

172 citations


Journal ArticleDOI
TL;DR: In this article, thin aluminium oxide thin films were prepared by the ALE process using AICI3 and A1(OR)3 (R = Et,Pr) as aluminium source and H2O, O2 or various aliphatic alcohols as oxygen source.

88 citations


Journal ArticleDOI
TL;DR: The binding energy (BE) of ruthenium compounds has been measured with a monochromatic small spot XPS as discussed by the authors, and it has been shown that the BE of the 3d 5 2 level of RuCl3 is in the range 279.91 −282.88 eV.

68 citations


Journal ArticleDOI
R. Messoussi1, J.C. Bernède1, S. Benhida1, T. Abachi1, A. Latef1 
TL;DR: In this paper, the determination of the barrier height by C-V measurements confirms the presence of a thin oxide layer at the interface of Ni SeCr and Bi SeCr structures.

54 citations


Journal ArticleDOI
TL;DR: In this paper, the constitutional phases and microstructure of Ni47Ti44Nb9 alloy have been studied by means of optical microscopy, electron probe X-ray microanalyses (EPMA) and Xray diffraction.

48 citations


Journal ArticleDOI
TL;DR: In this paper, the theoretical basis of the method of hydrothermal modification of adsorbents is presented, and the influence of such parameters as temperature, time, pressure and primary porous structure on the texture and structure of the skeleton of the silica gel is discussed.

45 citations


Journal ArticleDOI
TL;DR: In this paper, polycrystalline ZnO films of thickness between 4 μm and 11 μm were prepared by the spray/CVD technique from a solution of 0.4M Zn-acetate containing 004M Al-nitrate solution for Al-doping.

42 citations


Journal ArticleDOI
TL;DR: The EPR spectrum of Zirconium oxide is characterized by an anisotropic g tensor with g zz = 2.0336, g yy = 2., 2.0096, and g xx = 2,034 as mentioned in this paper.

39 citations


Journal ArticleDOI
TL;DR: The influence of zinc salt on the nature of ZnO powders prepared by spray pyrolysis has been studied in this paper, where a wide variety in the state of aggregation of the particles can be obtained by selecting the type and concentration of the salt.

39 citations


Journal ArticleDOI
TL;DR: In this paper, the composition and structure of the xRuO 2 · (1− x ) IrO 2 anode coatings obtained by pyrolysis of Ru and Ir chlorides have been studied by X-ray and IR analysis.

Journal ArticleDOI
TL;DR: In this paper, the authors show that the proportion of defects increases with the surface area, reaching more than 25 % of the total amount of methanol adsorption sites in the case of high surface area samples.

Journal ArticleDOI
TL;DR: In this paper, a single crystal X-ray structural analysis of tetraphenylphosphoniumsalt (TPHS) was performed on a V 12 O 32 4− cavitand.

Journal ArticleDOI
TL;DR: In this paper, an end-on σ-coordination of CO2 to coordinatively unsaturated surface cationic centres, and in this coordination the molecule preserves the linear shape and loses the center of symmetry (D∞ h → C∞ v).

Journal ArticleDOI
TL;DR: The results of IR investigations of the adsorption of simple olefins (ethylene, propylene and isobutene) on a number of metal oxide catalysts are summarized in this paper.

Journal ArticleDOI
TL;DR: In this article, infrared spectroscopy was used to compare CO adsorption at 77 K on undoped MgO with Mg vapour at ≈ 873 K.

Journal ArticleDOI
TL;DR: In this article, the authors report on the preparation of metal sulfide films from an acidic medium using Na 2 S 2 O 3 as a sulphur source, and electrical, structural and optical characterizations have been carried out.

Journal ArticleDOI
TL;DR: In this article, high-resolution transmission electron microscopy (HRTEM) and high resolution FTIR spectroscopy were used to characterize unsintered and sintered monoclinic ZrO2.

Journal ArticleDOI
TL;DR: In this article, Ardizzone et al. report results concerning the effects specifically induced by severe grinding on the phase composition, on the state of the surface and on the interfacial electrostatic reactivity of the powders.

Journal ArticleDOI
TL;DR: In this paper, the state and localization of silver ions adsorbed on titania (anatase) are studied by IR spectroscopy of probe molecules, and it is established that the surface hydroxyl groups of the support do not participate in the adsorption of Ag + and the process leads to blocking of the so-called α-Lewis acid sites characteristic of pure anatase.

Journal ArticleDOI
TL;DR: In this article, an equation of state for the hard-sphere fluid in three dimensions was extended to the two-, four-, and five-dimensional cases in addition to the trivial one-dimensional case.


Journal ArticleDOI
TL;DR: In this paper, a series of Co1.0 oxides as well as their corresponding spinels (x = 0.0, 0.1,0.3 and 0.5) were prepared and X-ray diffraction and IR spectral studies were used to identify the different phases present.


Journal ArticleDOI
TL;DR: In this paper, a solution growth of silver sulphide thin films from an alkaline medium (pH 8 to 10) has been carried out using thiourea as a sulphur releasing agent.

Journal ArticleDOI
TL;DR: The bulk interaction between iron(III) oxide and titanium(IV) oxide occurs at temperatures in excess of 773 K and the phase transition from anatase phase to rutile phase is observed to occur approximately 200 K lower in the presence of iron than when it is absent.

Journal ArticleDOI
TL;DR: In this article, the effects of EDTA as a complexing agent and of temperature on the deposition of Ag2S films have been studied and the optical bandgap was estimated to be 0.95 eV.

Journal ArticleDOI
TL;DR: In this article, it was shown that partially hydrolysed Cr(III) nitrate solutions contain zig-zag chains of cis-linked octahedra, which are retained once intercalated into smectite clays, in which the chains run parallel with the alumino-silicate layers.

Journal ArticleDOI
TL;DR: In this article, the role of the shape, dimension and micromorphology of the particles on the surface chemistry is particularly stressed, and morphological aspects of a selection of finely divided solids have been investigated by adsorption microcalorimetry and electron microscopy (TEM, HREM).

Journal ArticleDOI
TL;DR: In this paper, an empirical potential for aluminosilicates containing cations and water molecules in their micropores and suitable for molecular dynamics simulations is described, where chemical bonds are represented by short range potential functions and coulombic interactions are computed explicitely.