Materials Literature
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Abstract The synthesis and spectroscopic and electrochemical properties of crown-ether substituted metallophthalocyanines (MCRPcs), optically active phthalocyanines (Pcs), subphthalocyanines (SubPcs), low symmetrical Pcs, ring-expanded Pcs, and novel oligomers of Pcs studied mainly by the author over the last 20 years…
In this paper, degree of sensitization (DOS) of austenitic stainless steels (SS) is defined in terms of the characteristic parameters of the chromium depletion zones: coverage (proportion of the grain boundary length covered by chromium depletion zones), width, and depth (the minimum level of chromium in the depletion…
Porous polyhedral silsesquioxane (POSS)-based network polymers are prepared using hydrosilation copolymerisation reactions of a silyl-functionalised POSS molecule with a vinyl-functionalised moiety. Characterisation of these solids show them to possess pore structures in the mesoporous regime, and polymers with longer…
Atomistic simulation calculations based on energy minimization techniques have been used to predict the O positional parameter of a wide range of A2B2O7 pyrochlore oxides. Cations studied range from Lu3+ to La3+ on the A site and Ti4+ to Pb4+ on the B site. In all cases the model included a specific predicted degree o…
We report on the temperature dependence of electrical resistivity, Seebeck coefficient and Hall coefficient for Fe2(V1−yTiy)Al with y=0−0.25 and Fe2(V1−zMoz)Al with z=0−0.20. While the Heusler-type Fe2VAl (y=z=0) exhibits a semiconductor-like resistivity behavior, a slight substitution of Ti or Mo for V causes a sharp…
The study of metallic foams has become attractive to researchers interested in both scientific and industrial applications. The different production methods have not been widely utilized because of difficult process control and high production costs. A new easily-available agent for metal foaming, calcium carbonate, i…
Plasticizers are usually added to improve the mechanical and conditional (thermomechanical) quality of film coatings. Different molecular weights and concentrations of polyethylene glycol were incorporated as plasticizers in hydroxypropylmethylcellulose (HPMC) films. Thermomechanical and mechanical properties of cast…
Research Article| January 01, 2002 Structural Features of Micas Giovanni Ferraris; Giovanni Ferraris 1,2Dipartimento di Scienze Mineralogiche e Petrologiche Università di Torino 10125 Torino, Italy and 1Istituto di Geoscienze e Georisorse Consiglio Nazionale delle Ricerche 10125 Torino, Italy, ferraris@dsmp.unito.it,…
Block-copolymers are known to generate nano-scale microdomains by microphase-separation, if they are annealed at a temperature lower than their order-disorder transition temperatures. We tried to transfer microdomains onto substrates by only using the reactive-ion etching method, which is widely used in semiconductor…
The soft clay of Ariake Bay, in western Kyushu, Japan covers several hundred square kilometers. Ariake clay consists of the principal clay minerals namely smectite, illite, kaolinite and vermiculite, and other minerals in lesser quantity. The percentage of the principal clay mineral can vary significantly. The percent…
Pluronic block copolymers are found to be an efficient drug delivery system with multiple effects. The incorporation of drugs into the core of the micelles formed by Pluronic results in increased solubility, metabolic stability and circulation time for the drug. The interactions of the Pluronic unimers with multidrug-…
A method of synthesis of 1,2-bis(3,4-dicyanophenoxymethyl)benzene from the 1,2-bis(hydroxymethyl)benzene and 4-nitrophthalodinitrile is developed. Its tetramerization with Zn(OAc)2·2H2O gives a binuclear zinc phthalocyanine of a new type, containing four o-phenylidene bridges. The use of microwave heating decreases re…
A novel thin film (micrometer thickness) shape memory alloy (SMA) micro actuator is presented in this paper. The thin film SMA with composition of approximately 50:50 nickel titanium (NiTi) is sputter-deposited onto a silicon wafer in an ultra high vacuum system. Transformation temperatures of the NiTi film are determ…
Indium–tin–oxide (ITO) films deposited by sputtering and e-gun evaporation on both transparent (Corning glass) and opaque (c-Si, c-Si/SiO2) substrates and in c-Si/a-Si:H/ITO heterostructures have been analyzed by spectroscopic ellipsometry (SE) in the range 1.5–5.0 eV. Taking the SE advantage of being applicable to ab…
Fluorescence and IR spectroscopic techniques have been used to characterize cure in polyurea (PUa), polyurethane (PU), and polyurethane−urea (PUU), based on the study of model compounds. Polyurea cured in a nonreactive diluent by reacting liquid MDI (4,4‘-methylenebisphenyl diisocyanate) with 3,5-diethyltoluene diamin…
We present the synthesis of four perylene–porphyrin building blocks for use in Glaser, Sonogashira, or Suzuki polymerizations. The building blocks bear synthetic handles (4-ethynylphenyl, 4-iodophenyl, bromo) at the trans (5,15) meso-positions of a zinc porphyrin and contain two or four perylene-monoimide dyes attache…
Initial characterization of the electrochemical performance of obliquely deposited manganese films with a chevron microstructure, for potential application as electrochemical capacitor materials, has demonstrated that Mn deposited in porous metallic form with subsequent electrochemical oxidation provides a route to fo…
Mathematical modeling was used to simulate the dissolution of a single MnS inclusion within an electrochemical microcell. The model allowed for the evaluation of the hypothesis of mechanism of pit initiation based on a critical concentration of thiosulfate ions in the presence of chloride ions, which results in depass…
Current-Voltage Characteristics and Impedance Analysis of Solid Oxide Fuel Cells for Mixed H 2 and CO Gases , Sasaki, K., Hori, Y., Kikuchi, R., Eguchi, K., Ueno, A., Takeuchi, H., Aizawa, M., Tsujimoto, K., Tajiri, H., Nishikawa, H., Uchida, Y.
Various analytical methods like analytical ultracentrifugation, UV–vis absorption spectroscopy, NMR spectroscopy, and powder X-ray diffraction have been applied to study the stability of thiol stabilized semiconductor nanoparticles. Reduced particle sizes were found in solution at low concentrations. Most probably the…