Materials Literature
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Three-dimensionally ordered macroporous carbons were prepared from bimodal polymer-silica colloidal crystals; the resulting carbons had interconnected macropores, and the walls of the macropores were composed of hollow mesosized spheres.
Article The use of polyelectrolyte multilayers of cationic starch and CMC to enhance strength properties of papers formed from mixtures of unbleached chemical pulp and CTMP. Part I was published on January 1, 2006 in the journal Nordic Pulp & Paper Research Journal (volume 21, issue 1).
Photochemical Electron Transfer (ET) between an organic dye, the porphyrin derivative TMPyP, and an electron acceptor, methyl viologen MV2+, have been investigated at the interface of two different inorganic films, i.e., layered titania nano-sheets (TNS) and a monolayer film of spherical and mono-dispersed mesoporous…
The trinuclear and the tetranuclear complexes [[iPrtacnCr(CN)3]2[Ni(cyclam)]](NO3)2.5H2O 1 (cyclam = 1,4,8,11-tetraazacyclotetradecane, iPrtacn = 1,4,7-tris-isopropyl-1,4,7-triazacyclononane) and [[iPrtacnCr(CN)3Ni(Me2bpy)2]2](ClO4)4.2CH3CN 2 (Me2bpy = 4,4-dimethyl-2,2-bipyridine) were synthesized by reacting (iPrtacn…
Treatment of dicobalt octacarbonyl with TEMPO in THF at room temperature, in the presence of oleic acid as the sole additive, leads to the formation of monodisperse nanoparticles (ca. 3.0 nm diameter) of CoO; the particles agglomerate in solution at room temperature into aggregates, and this property has been used for…
The use of synthetic polymeric vascular grafts is limited by the thrombogenecity of most biomaterials. Efforts to reduce thrombogenicity by seeding grafts with endothelial cells, the natural non-thrombogenic lining of blood vessels, have been thwarted by flow-induced cell detachment. We hypothesized that by creating w…
The structure and shape-memory behavior of Ti51.5Ni33.1Cu15.4 amorphous films, prepared by sputtering and annealed at 773, 873 and 973 K for 1 h, have been investigated. The microstructure of the thin films evolved in the following sequence as a function of the annealing temperature: (1) plate precipitates of Guinier–…
The use of nanostructures in photovoltaics offers the potential for high efficiency by either using new physical mechanisms or by allowing solar cells which have efficiencies closer to their theoretical maximum, for example by tailoring material properties. At the same time, nanostructures have potentially low fabrica…
Nanometer scale morphological changes in the passive oxide on aluminum have been tracked as a function of polarization in aqueous chloride and borate electrolytes. Nanoscale void formation has been detected and characterized in the passive oxide on single and polycrystalline Al as well as nanocrystalline Al films. Voi…
In this study, electrochemical behaviors of Co(II) and Pd(II) phthalocyanines carrying tetrakisdiethoxymalonyl and Pd(II) phthalocyanine carrying tetrakiscarboxymethyl substituents at the peripheral positions are investigated by cyclic voltammetry and applied potential chronocoulometry techniques. Cyclic voltammetric…
We studied certain kinds of diepoxy monomers, with so-called `mesogens'- molecular groups that cause self-ordering - and cured them with appropriate curing agents. Their thermal conductivities were up to 5 times higher than those of conventional epoxy resins. We believe that the mesogens formed nanoscopic high-order s…
Abstract Isostructural ferromagnetic and ferroelectric perovskites like manganites (La,A)MnO 3 and titanates Pb(Zr,Ti)O 3 are favourable candidates for layered film structures with large magnetoelectric coupling phenomena. Manganites (La,A)MnO 3 have already been intensively investigated: conduction electrons have a h…
Grain size and piezoelectric properties were investigated in (K, Na)NbO3 ceramics substituted with Ba for K and Na by 1 to 5 mol%, in anticipation of high piezoelectric properties. The grain size strongly depended on the A/B ratio in perovskite structure. The grain growth phenomenon was markedly similar to that of BaT…
A pH-sensitive pyridine-based gelator has been found as a flexible and efficient template for the transcription of nanofibrous silica. The morphology and aggregation degree of silica nanofibers and nanotubes (30–60 nm thick, with 3–10 nm inner channels) could be tuned by simply adjusting the pH conditions through the…
Engineering of porous solid oxide fuel cell (SOFC) composite cathodes comprising a mixture of electrocatalyst and ionic conductor requires the knowledge of electrochemical kinetic parameters such as the reaction order and the charge-transfer coefficients. Conventional dc techniques are commonly employed in electrochem…
Statistics show that the wear comfort is the most important property of clothing demanded by users and consumers. Hence, biofunctional textiles only have a high market potential, if they are comfortable. In this work it is shown how the thermophysiological and skin sensorial wear comfort of biofunctional textiles can…
Two sets of laboratory-prepared and industrial nickel hydroxide samples were studied and their microstructure characterized by performing Rietveld refinements with a spherical harmonic-implemented algorithm using both neutron and X-ray powder diffraction data. The results indicate that the anisotropic line broadening…
PbS nanowires glazed with silica have been deposited by CVD using PbCl2 and S on silicon substrates at temperatures between 650 and 700 °C.
A parabolic-hyperbolic nonconserved phase-field model is here analyzed. This isan evolution system consisting of a parabolic equation for the relative temperature$\theta$ which is nonlinearly coupled with a semilinear damped wave equation governing theorder parameter $\chi$. The latter equation is characterized by a n…
A single-chamber solid oxide fuel cell (SC-SOFC) with micropatterned electrodes on the electrolyte has been fabricated by a microfluidic lithography technique. Microchannels formed by contacting the polydimethylsiloxane mold with a polished substrate of YSZ disk were filled with the well-dispersed suspensions of the c…