Materials Literature
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Five heat treat options for an advanced nickel-base disk alloy, LSHR, have been investigated.These included two conventional solution heat treat cycles, subsolvus/oil quench and supersolvus/fan cool, which yield fine grain and coarse grain microstructure disks respectively, as well as three advanced dual microstructur…
Examples of a new class of zwitterionic, “right-hand side” merocyanines containing a cyanodicyanomethylidenedihydrofuran electron acceptor have been prepared. As well as allowing for the facile synthesis of these chromophores, our synthetic methodology enables considerable variation in both the donor moiety as well as…
Cyanide-functionalized mesoporous silica SBA-15 (CN/SBA-15) with pore diameters larger than 6 nm has been prepared by a one-pot synthesis. The structure of CN/SBA-15 is affected by the amount of the functional silane 2-cyanoethyltriethoxysilane (CTES) and the conditions of co-condensation in the acidic aqueous solutio…
We report a one-pot synthesis of regioregular polythiophene stabilized gold nanoparticles with narrow size distributions that can form fibril-like structures due to the self-assembly of regioregular polythiophene.
For wetland soil studies, it would be desirable to estimate soil redox status and its effect on element translocations based on diagnostic redoximorphic features. However, their identification and interpretation is often complicated and require a regional calibration. This study was conducted (i) to determine the rela…
Photochromic performance of diarylethene single crystals was controlled by crystal engineering using non-covalent aromatic-aromatic interactions as the directional intermolecular force. A diarylethene derivative with two pentafluorophenyl groups, 1,2-bis(2-methyl-5-pentafluorophenyl-3-thienyl)perfluorocyclopentene (1a…
Results of the electrical conductivity study of highly textured, ultrathin (15 nm) cubic yttria-stabilized zirconia (YSZ) thin films are presented for the first time. A nanoscale effect that results in exceptionally high ionic conductivity at moderate temperatures is detected in films less than 60 nm thick. The conduc…
Bimodal porous carbons with both micropores and meso- or macropores were selectively synthesized by an colloidal crystal-templating process. The opal templates exclusively contributed to the formation of meso- and macropores in carbons. The electrical double-layer capacitance per surface area of the templated porous c…
Electrocrystallization of (o-P2)Mo(CO)4, where o-P2 is the tetrathiafulvalene-based chelating diphosphine o-Me2TTF-(PPh2)2, in the presence of the Linquist anion Mo6O192− affords a 2:1 salt, formulated as [(o-P2)Mo(CO)4]2[Mo6O19], with a Heisenberg spin chain magnetic behaviour.
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The photodynamic activities of novel asymmetrically meso-substituted cationic porphyrins, 5,10-di(4-methylphenyl)-15,20-di(4-trimethylammoniumphenyl)porphyrin iodide 1 and 5-(4-trifluorophenyl)-10,15,20-tris(4-trimethylammoniumphenyl)porphyrin iodide 2 and its metal complex with Pd(II) 3, have been investigated in bot…
El servicio de alcantarillado de Cajicá no responde a un proyecto de ingeniería pensado hacía el futuro, sino, más bien, a \nsoluciones coyunturales de las comunidades urbana y rurales, y, por tanto, pensado para beneficiar una población relativamente pequeña (menos de 10.000 habitantes), sin tener en cuenta que,…
Linear arrays of ZnO nanoparticles have been successfully prepared by a simple sol–gel condensation reaction involving chemical modifiers, followed by drying (80 °C) and calcination (500 °C). The calcined material (nano-array ZnO) is composed of approximately spherical nanoparticles of average diameter 21 ± 3 nm, self…
K6Cd4Sn3Se13 forms in superheated water and has a polar open-framework structure that is based on an octahedral topological motif. It forms from the polymerization of a single [Cd4Sn3Se13]6− cluster which formally derives from a [Cd4Sn4Se17]10−via elimination of one [SnSe4]4− anion. K6Cd4Sn3Se13 exhibits facile ion-ex…
Sulfur-cured unfilled natural rubber (NR) was devulcanized in supercritical CO2 (scCO2) by using diphenyl disulfide (DD) as a devulcanizing reagent. The product was fractionated into sol and gel components. The fraction of sol component that contains reusable linear polymer increased with the increase in CO2 pressure,…
Effect of pass strain (Δε) on grain refinement was studied in multidirectional forging (MDF) of a coarse-grained 7475 Al alloy at 490°C under a strain rate of 3 × 10−4 s−1. Samples of rectangular shape were deformed up to accumulated strains of around 6 with subsequent changes in loading direction 90° from pass to pas…
Various organic moieties are homogeneously introduced in high quantities into mesostructured porous silica films through a general co-condensation process, which influences the self-assembly mechanism, depending on the physico-chemical properties of each function.
An anode-supported solid oxide fuel cell (SOFC) with lanthanum-doped ceria (LDC) and strontium and magnesium doped lanthanum gallate (LSGM) bilayer electrolytes was fabricated and tested. The bilayer electrolyte thin film, consisting of a 25 μm thick LDC layer and a 75 μm thick LSGM layer, was prepared by a simple dry…
We used a microreactor for CdSe nanocrystal preparation and explored the effects of experimental conditions on the properties of the products. The particle growth kinetics and photoluminescence properties of the nanocrystals showed identical trends to previous reports, indicating the efficiency of the current method f…
Development of simple and reliable protocols for the synthesis of phase-pure core–shell metal nanoparticles is an important problem in nanomaterials synthesis; the synthesis of Au core–Pd/Pt shell nanoparticles is described in this paper. This is accomplished by utilizing Keggin ions bound to the surface of gold nanop…