Materials Literature
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Under the structure-directing effect of a metal complex formed in situ, supertetrahedral [ZnGe3S6(H2O)(S3)(1/2)]1- clusters alternate with tetrahedral Zn(H2O)(S3)(1/2)1- units to form a two-dimensional wide bandgap semiconductor that shows photocatalytic activity for H2 production from aqueous solution.
Photophysical studies of a newly synthesized fused subphthalocyanine dimer-C60 revealed a complex cascade of energy transfer events to succeed the initial SubPc dimer photoexcitation.
The three-dimensional structure of nanocrystalline GaN has been studied by X-ray diffraction, Rietveld and atomic pair distribution function (PDF) analyses. The material is of very limited structural coherence, yet possess a well-defined atomic arrangement resembling the wurtzite structure. The study demonstrates the…
A "sandwich" type polyoxometalate catalyst ([MeN(n-C8H17)3]12[WZn3(ZnW9O34)2]) was very efficiently recycled by nanofiltration with almost quantitative retention, using an alpha-alumina supported mesoporous gamma-alumina membrane.
Breakaway oxidation of 15–18 % Cr ferritic stainless steels occurring in water vapour is described in the temperature range 800–1000°C. The failure of the protective chromia scale leads to iron oxide(s) nodule formation with accelerated kinetics. Characterisation of the (Fe,Cr)2O3 initial oxide scale by Raman spectros…
An in situ surface study of the carbon dioxide corrosion of mild steel has been undertaken using the tandem technique of mixed potential/synchrotron radiation-grazing incidence X-ray diffraction (SR-GIXRD). Long-term monitoring of the mixed potential showed there was an initial shift toward cathodic potentials attribu…
The synthesis and structure of a novel decanuclear copper(II) cage is reported. The assembly of the cage is facilitated by the cumulative coordinative interaction of tert-butyl phosphonate, 2-pyridylpyrazole and hydroxide ligands with copper(II) ions. Magnetic studies of this decanuclear copper(II) cage indicate compl…
Well-defined macroporous ceramics consisting of TiO2 and ZrO2 have been fabricated by two methods. One is via a template-assisted colloidal processing technique and the other is via a hetero-coagulation of template/ceramic particle colloidal processing. The former technique is as follows. Close-packed polymer spheres…
In a previous study, we found that different collagen gels produced using collagen fibrils extracted from 1-, 4- and 8-month-old rat tails essentially influenced the morphogenesis of epithelial cells. More importantly, the youngest collagen gel induces the highest level of cell apoptosis. The objective of this study w…
Alloying process and shape memory properties of a Ti/Ni multilayer thin film fabricated by a dual d.c. magnetron sputter–deposition method were investigated, and compared with those of a Ti—Ni amorphous thin film fabricated by an alloy target sputter–deposition method. The multilayer thin film was made by depositing T…
A simple method for the preparation of highly fluorescent and stable, water-soluble CdSe-ZnS quantum dots is reported using calix[4]arene carboxylic acids as surface coating agents; the coating of the surface with the calixarene and the conjugation of antibodies to the quantum dots are confirmed by fluorescence correl…
A novel method of ceramic-to-metal joining, referred to as reactive air brazing, was investigated as a potential method of sealing planar solid oxide fuel cells (SOFCs). In the present study, yttria stabilized zirconia (YSZ) and Fecralloy were selected as subject materials to simulate the cell-to-frame seal in planar…
A novel dinuclear complex containing the photo-sensitizing Ru unit and a Pd center is effective toward selective catalytic dimerization of alpha-methylstyrene leading to 2,4-diphenyl-4-methyl-1-pentene under visible-light irradiated conditions.
Biopolymer chitosan manifests properties that open up a wide span of applications in many sectors, mainly medicine. Examples are presented of well-known uses of chitosan in medical dressings, including haemostatic preparations. On the basis of this background, a survey is made of the research and results achieved in t…
Luminescence centres formation due to the doped isoelectron impurities (II) and antisite defects in the garnets of A3B5O12 (A=Y, Lu, Gd; B=Al, Ga) formula is considered. Substitution of the Y- or Lu-cations by La3+ and Sc3+ II in dodecahedral {c}-sites and of the Al-cations by Y3+, Lu3+, Sc3+ II in octahedral (a)-site…
An organic anion exchanged hydrotalcite-like inhibitor was synthesized using an approach similar to that described previously by Williams and McMurray and characterized as to its ability to inhibit the oxygen reduction reaction on a Cu rotating disk electrode. The results suggest that this new inhibiting pigment would…
A mathematical model describing the multi-component species transport inside the porous solid oxide fuel cell (SOFC) anode has been developed. The model includes the water–gas shift reaction in the anode electrode (backing) layer and the spatially resolved electrochemical reaction in the reaction zone layer. The modif…
A method to combine measurements of the structure functions performed by several experiments in a common kinematic domain is presented. This method generalises the standard averaging procedure by taking into account point‐to‐point correlations which are introduced by the systematic uncertainties of the measurements. T…
Perfluorinated sulfonic acids have been immobilised into mesoporous silica frameworks by a one-step process, representing the first example of the successful incorporation of charged silanes using this route, and have been shown to be excellent catalysts for Brønsted acid catalysed transformations.
Highly ordered periodic mesoporous organosilica (PMO) materials with various mesostructures, including lamellar, bicontinuous cubic Ia3d, 2D hexagonal (P6mm), 3D hexagonal (P63/mmc) and cubic Pm3n, have been synthesized using Gemini surfactants with general formulas of [CnH2n+1N(CH3)2(CH2)sN (CH3)2CnH2n+1]Br2 (n = 6–1…