Materials Literature
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The influence of fiber surface modifications like dewaxing, alkali treatment and methyl methacrylate grafting on the thermal and electrokinetic properties of coir (coconut) and sisal fibers has been investigated. Additionally scanning electron microscopy was performed to follow changes in the fiber surface morphology.…
Chemical reactions between the superior perovskite oxide-ion conductor Sr- and Mg-doped (LSGM), and NiO have been studied by powder X-ray diffraction. The results showed that an extensive reactivity occurs as a result of La migration driven by a gradient of La chemical activity. La migration across the LSGM/electrode…
Electrolyte films of samaria-doped ceria (SDC, Sm 0.2 Ce 0.8 O 1.9 ) are fabricated onto porous NiO-SDC substrates by a screen printing technique. A cathode layer, consisting of Sm 0.5 Sr 0.5 CoO 3 and 10 wt % SDC, is subsequently screen printed on the electrolyte to form a single cell, which is tested at temperatures…
The spectroscopic properties and the photophysical behaviour of difluoroboradiaza-s-indacene 1, especially designed for the near infrared (NIR) spectral region and equipped with a p-dimethylaminophenyl group at the meso-position, were studied by steady-state and time-resolved optical spectroscopy. Solvent-dependent me…
We report the use of supercritical carbon dioxide (scCO2) to create a diverse range of polymeric composites incorporating thermal and solvent labile guest materials such as proteins; no additional co-solvents are required; the entire process can be carried out at near ambient conditions; polymer morphology is controll…
Nanocrystalline ZnS:Pb2+ is synthesised ia a precipitation method. The influence of the size of the nanocrystals and the sulfide concentration used in the synthesis on the luminescence properties is investigated. Nanocrystalline ZnS:Pb2+ shows a white emission under UV excitation with a rather high quantum efficiency…
A new templating method using small, inexpensive non-surfactant chemicals has been developed facilitating the synthesis of hydrothermally stable foam-like mesopore networks with high surface areas.
Preface. Introduction: Of Rotten Rocks, Soils and Solutions. Overview -- Landscapes and the Evolution of the Regolith. Earth Materials. Weathering: Agents and Controls. Landscape and Regolith Hydrology. The Chemistry of Weathering. Regolith Geochemistry Mineral Weathering. Rock Weathering. Products of Weathering. In S…
Chemical mixing of carbon and amorphous hydrous manganese oxide particles as an active material for electrochemical pseudocapacitor was proposed to increase the efficiency of added carbon as a conducting agent to expand the active site area on the surface of particle. Instead of physically mixing the conducting carbon…
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…