Materials Literature
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In this study cold-rolled steel (CRS) panels were cleaned in solutions of different pH values. The influence of the cleaning solution pH on the CRS surface chemistry was characterized and the corrosion performance of CRS panels was evaluated. Scanning electron microscopy (SEM) examination revealed differences in the s…
Well-aligned zinc oxide (ZnO) nanorods were densely grown on Si substrate using ZnO thin-film seed layer without any catalysts and/ or additives by a simple solid–vapour phase thermal sublimation technique. The growth mechanism can be interpreted as self-catalyst of zinc particles based on vapour–solid (VS) mechanism.…
In this study corrosion behavior of low alloy steel was investigated in the presence of anaerobic sulfate-reducing Desulfotomaculum sp. which was isolated from an oil production well. In order to determine corrosion rates, mass loss measurements were performed with and without bacteria in the culture medium. Scanning…
A sol-gel method based on in situ generation of mixed-metal chelates by complexing metal ions with ethane-1,2-diol in aqueous media has been elaborated to prepare lanthanide-ion containing garnets, Gd 3 Al 5 O 12 (GAG) and La 3 Al 5 O 12 (LAG). XRD patterns of the powders sintered at 1 000 °C revealed the formation of…
The Beckmann rearrangement of cyclododecanone oxime, the monomer for the production of Nylon 12, was successfully accomplished using a wide range of micro–mesoporous catalysts, under microwave conditions, affording the selective production of ω-laurolactam in high conversions after a short period of time (typically 5…
Annealed Cu - Al - O films showed marked structural changes and differing optoelectronic properties with varying annealing temperature. Results of X-ray diffraction (XRD) demonstrated that CuO and CuAl 2 O 4 were the intermediate reaction phases. XRD also showed that the phase grown above 800 ° C annealing temperature…
This short review covers some of the advances made in artificial photosynthetic models using porphyrin-spacer-poly(pyridyl) cation conjugates.
A series of disc-shaped liquid crystals, monomers and dimers, have been investigated. A spacer linked to the pentakis(phenylethynyl)phenoxy core of the mesogens was substituted with perfluorinated chains to investigate the microphase segregating effect of such groups. The nematic phase, commonly found for these mesoge…
Abstract Polypyrrole thin film microelectrodes prepared from an aqueous solution of the sodium salt of 1, 2‐napthaquinone‐4‐sulfonic acid and pyrrole in hydrochloric acid as the supporting electrolyte was characterized electrochemically for the first time and found to exhibit good electronic and spectroscopic properti…
The detail structure of heavy rust layers with large swelling and laminated layers formed on weathering steel bridges have been investigated by optical microscope and laboratory powder X-Ray diffraction (XRD) and synchrotron XRD in SPring-8. Some large gaps (inter-layer) and many linearly arrayed voids (LAV) were foun…
Scanning tunnelling microscopy (STM) has proved to be an invaluable tool for investigating surface reactions and catalysis at the atomic scale on model catalysts. We show that good models of nanoparticulate catalyst surfaces can now be fabricated and imaged by the use of surface science methodology. In this paper the…
This paper reports on the wetting behavior, reactivity, and long-term electrical conductance of a series of ternary filler metals being considered for brazing lanthanum strontium cobalt ferrite (LSCF)-based oxygen separation membranes. Mixed ionic/electronic conducting perovskite oxides such as LSCF and various doped…
Artificial hemoprotein nanotubes have been prepared by a layer-by-layer deposition technique with human serum albumin (HSA) incorporating the synthetic heme (FeP) [HSA-FeP] using an anodic porous alumina template; each of the liberated tubules has a very uniform outer/inner diameter and can reversibly bind dioxygen (O…
It is not too surprising that 5-fold symmetry is the symmetry of quasicrystals since icosahedral coordination is the most frequent atomic environment type (AET) in intermetallic phases. What about AETs with 7-fold symmetry? Whereas no regular or semi-regular polyhedra (Platonic or Archimedean solids) exist with rotati…
Ti51Ni39Cu10 SMA is more suitable than Ti50Ni50 SMA for use as a high damping alloy at room temperature because it has higher inherent internal friction and wider martensitic transformation temperature range. Experimental results show that tanδ values of both (IFPT+IFI)B2→B19 and (IFPT+IFI)B19→B19′ of Ti51Ni39Cu10 SMA…
We investigate the existence of non–Bragg band gaps in 1D aperiodic photonic structures, namely the Fibonacci and Thue–Morse lattices combining ordinary positive index materials and dispersive metamaterials. Both structures present new band gaps which, in contrast with the usual Bragg gaps, are not based on interferen…
Osteoblast proliferation is sensitive to material surface properties. In this study, the proliferation of MC3T3 E1-S14 osteoblastic cells on poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) films with different surface characteristics was investigated with the aim of evaluating the cause of a lag in cell growth pre…
This paper reports a modified reverse micelles process for preparing nanoparticles of europium-doped strontium aluminate, a typical elastico-luminescent material. A polymeric matrix was coated on the surface of the precursor formed in the reverse micelles. The polymeric matrix is considered to prevent particle agglome…
Heat transfer fouling experiments were carried out in a temperature controlled stirred vessel using aqueous solutions of whey protein concentrate in the concentration range of 3 to 3.5 wt- % at a bulk temperature of 50 °C and pH of 6. Heat transfer data were obtained from thermocouples embedded in an immersed electric…
Close packed coupled multielectrode arrays simulating a planar electrode were used to measure the current evolution as a function of position during initiation and propagation of crevice corrosion of AISI 316 stainless steel. Scaling laws derived from polarization data guided the implementation of rescaled crevices pr…