Materials Literature
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We report stable power generation, ∼ 0.1 W / cm 2 , from the direct electrochemical oxidation, without reforming, of toluene, n -decane, and synthetic diesel fuel at 973 K in a solid oxide fuel cell with a composite anode containing Cu and ceria. The liquid fuels were injected directly into the anode compartment and t…
The inorganic layered double hydroxide support, Mg4Al2(OH)12(NO3)2·mH2O, could be obtained by coprecipitation in aqueous solution; the interlayered NO3− anions can be replaced by biomolecules such as cytidine 5′-monophosphate, adenosine 5′-monophosphate, guanosine 5′-monophosphate and adenosine 5′-triphosphate to form…
Composite colloids of gold and polypyrrole were prepared using two different methods: 1, using pyrrole colloid, created by the oxidation of pyrrole by ferric chloride, to subsequently reduce chlorauric acid and, 2, oxidizing pyrrole monomer with chlorauric acid in a sodium dodecylbenzene sulfonate solution. In each ca…
Precipitation kinetics and strengthening have been investigated for a Fe–0.8wt%Cu alloy. Microstructure evolution during aging at 500°C has been studied by a combination of Transmission Electron Microscopy and Small-Angle X-ray Scattering to provide information on the nature and location of the precipitates as well as…
The thermal and photochemical ring opening and ring closure of the spiropyran/merocyanine couple of three nitro-substituted spiropyrans (6-NO2: 6, 7 and 8-NO2: 8) were studied and the results were compared with those of other 6-NO2 spirobenzopyranindolines (BIPS) (1–5). The photocolouration, which occurs in the triple…
The thermal conductivities of doped polysilicon layers depend on grain size and on the concentration and type of dopant atoms. Previous studies showed that layer processing conditions strongly influence the thermal conductivity, but the effects of grain size and dopant concentration were not investigated in detail. Th…
A new family of fast O2− conductors, which exhibit anionic conductivity comparable to that of stabilised zirconia, is presented. The parent compound of this new family, hereafter called LAMOX, is lanthanum molybdate La2Mo2O9. Various substitutions have been attempted: on the lanthanum site (La2 − xAx)Mo2O9 with A = Sr…
The challenge to the use of electronically conducting polymers as electrode active materials in supercapacitors is to outperform high-power, double-layer carbon supercapacitors (DLCSs). The present study demonstrates that a hybrid supercapacitor with p-doped poly(3-methylthiophene) (pMeT) as the positive electrode and…
Monocytes and macrophages play critical roles in inflammatory responses to implanted biomaterials. Monocyte adhesion may lead to macrophage activation and the foreign body response. We report that surface chemistry, preadsorbed proteins, and adhesion time all play important roles during monocyte adhesion in vitro. The…
The mesoporous silica SBA-15, functionalised with propylthiol groups during synthesis and rendered porous (mean pore diameter 51 Å) by extraction of surfactant template molecules, shows strong and size selective adsorption of proteins, selectively excluding those with molecular weights of ca. 40000 u and above. A mode…
The mid-wave IR and long-wave IR laser potential of rare-earth ions in chalcogenide glass fiber is reviewed. Spectroscopic data for the mid-wave and long-wave IR transitions for Pr/sup 3+/, Dy/sup 3+/, and Tb/sup 3+/ in chalcogenide glass is presented and used as a basis for discussion of laser potential in these glas…
The electrochemical reactivity of cations such as and into crystalline materials was investigated. The ionic diffusion constant of and into microcrystalline and nanocrystalline was measured by the galvanostatic intermittent titration technique. The ion diffusion constant into a 500 nm crystalline was found to be appro…
High temperature creep properties of Mg–Gd–Y–Zr alloys have been evaluated quantitatively. Creep test was carried out under a stress range of 50–100 MPa and a temperature range of 250–300°C. Within the limits of the creep test conditions used in this study, the activation energy for creep of investigated alloys is in…
Triboluminescent materials have been known for at least four centuries. The majority of work to date has been academic in nature – reporting a new triboluminescent material and/or presenting a spectroscopic study in an effort to explain the mechanism underlying the fracture-induced light emission. Recently, the advant…
Although many benefits are expected by reducing the operating temperature of solid oxide fuel cells (SOFCs) with alloy interconnectors, it should be of concern that chromium oxyhydroxide vapor generated from an oxide scale which is formed on the surface of most high temperature oxidation-resistant alloys, degrades the…
Optically clear thin mesoporous films with covalently attached fluorescein entities are shown to exhibit very fast response pH sensing.
The monomeric alkoxide (BDI)Mg(OtBu)(THF) and triphenylsiloxide (BDI)Zn(OSiPh3)(THF) have been prepared and characterized and shown to reversibly dissociate THF in solution on the NMR time scale; both compounds are active precursors for the ring-opening polymerization of lactide and the rate of polymerization is notab…
Raman scattering for a range of metal phthalocyanines using excitation frequencies from 457.9 to 1064 nm have been interpreted in the light of the recent DFT calculation on zinc phthalocyanine. The intention was to determine the features of the spectra that might be used for in situ analysis of specific phthalocyanine…
Biodegradable polymeric scaffolds for tissue engineering were fabricated by a gas-foaming/salt-leaching method using a combination of two effervescent salts, ammonium bicarbonate and citric acid. Poly(D,L-lactic-co-glycolic acid) (PLGA) in a state of gel-like paste was first produced by precipitation of PLGA dissolved…
The conditions for the fabrication of ideally ordered anodic porous alumina with a high aspect ratio were examined using pretextured Al in oxalic acid solution. The obtained anodic porous alumina has a defect-free array of straight parallel channels perpendicular to the surface. The channel interval could be controlle…