Effect of nanoporous In2O3 film fabricated on TiO2-In2O3 photoanode for photovoltaic performance via a sparking method

Journal of Solid State Electrochemistry - A simple and inexpensive sparking method was used to deposit body-centered cubic In2O3 film on TiO2 photoanode for 30–180 min for...     

Interfacial reciprocal grafting by free radical reactions in polymer blends

Recent developments in the field of reactive compatibilization of polymer blends prepared by melt processing focus on the addition of low molecular weight compounds. This work deals with in situ compatibilization through the formation of graft or crosslinked copolymers at the interface. Mixtures of semicrystalline hydrocarbon polymers have been subjected to free radical reactivity, in a co-rotating twin screw extruder (ZSK 30) in a single step. The particular system, high density polyethylene and polyamide 6, was blended in the presence of a peroxide and a reactive bifunctional monomer, maleic anhydride. Because of a combined effect, the reaction appears to occur mainly at the interface, where the resulting grafted copolymer acts as an anchor for the final stabilization of the biphasic system. Different analytical techniques, such as differential scanning calorimetry, scanning electron microscopy and tensile testing, helped in characterizing the resulting blends and confirmed the high level of interfacial grafting and the expected improvement in mechanical properties.     

The Classical Constraint on Relevance

We show that as long as the propositional constants t and f are not included in the language, any language-preserving extension of any important fragment of the relevance logics R and RMI can have only classical tautologies as theorems (this includes intuitionistic logic and its extensions). This property is not preserved, though, if either t or f is added to the language, or if the contraction axiom is deleted.     

Triplet ground state derivative of aza-m-xylylene diradical with large singlet-triplet energy gap

Organic molecules with a strong preference for triplet ground states, in which the triplet state is below the lowest singlet state by ≥10 kcal/mol, are typically short-lived and mostly detected as reactive intermediates. We now report a triplet ground state derivative of aza-m-xylylene diradical with a large singlet-triplet energy gap (ΔE(ST)) of ～10 kcal/mol, which is comparable to ΔE(ST) for the well-known reactive intermediate m-xylylene diradical. The aminyl diradical persists in solution at room temperature on the time scale of minutes.     

Calix[4]arene nitroxide tetraradical and octaradical

1,3-Alternate calix[4]arene with para-phenylene spacers connecting nitroxide monoradicals and high-spin (S = 1) diradicals provides tetraradical and octaradical scaffolds that possess conformations with slow electron spin relaxation rates (1/T(1)). Such scaffolds may facilitate tuning of relaxation rates that are more favorable for MRI or DNP applications.     

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Ohne Zusammenfassung     

Overcomplete mechanisms of plastic collapse

The analysis of regular mechanisms of plastic collapse for plane frames may be done by simple statics. By contrast, the solutions of analogous problems for space frames require the use of deformation equations; the mere formation of a collapse mechanism does not make the collapsing portion of a frame soluble by statics alone. Further, the number of plastic hinges for regular collapse of a plane frame is determinable, but no rule can be constructed for the number of hinges in a space frame; indeed, space frames can collapse by mechanisms which appear to have more degrees of freedom than are necessary, and are in this sense over-complete.     

Inelastic interactions with deuterons at very high energies

Cross sections for inelastic reactions of hadrons, photons and leptons with deuterons are derived from the Coherent Tube Model for particle-nucleus collisions. Predictions are compared with recent experimental data. Good agreement between experiments and theory is demonstrated.