A vertically aligned Ni3S2 nanorod@Ni–Fe LDH nanofilm was fabricated by a facile method and demonstrated as a superior oxygen-evolution catalyst.

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The Dicke subradiance and superradiance resulting from the interaction between surface plasmons of a nanosphere and an ensemble of quantum emitters have been investigated by using a Green's function approach. Based on such an investigation, we propose a scheme for a deterministic multi-qubit quantum phase gate. As an example, two-qubit, three-qubit and four-qubit quantum phase gates have been designed and analyzed in detail. Phenomena due to the presence of losses in the metal are discussed. The potential application of present phenomena to the quantum-information processing is anticipated.

About 6‐8 wt% yttria‐stabilized zirconia (YSZ) is the industry standard material for thermal barrier coatings (TBC). However, it cannot meet the long‐term requirements for advanced engines due to the phase transformation and sintering issues above 1200°C. In this study, we have developed a magnetoplumbite‐type SrAl12O19 coating fabricated by atmospheric plasma spray, which shows potential capability to be operated above 1200°C. SrAl12O19 coating exhibits large concentrations of cracks and pores (~26% porosity) after 1000 hours heat treatment at 1300°C, while the total porosity of YSZ coatings progressively decreases from the initial value of ~18% to ~5%. Due to the contribution of porous microstructure, an ultralow thermal conductivity (~1.36 W m−1 K−1) can be maintained for SrAl12O19 coating even after 1000 hours aging at 1300°C, which is far lower than that of the YSZ coating (~1.98 W m−1 K−1). In thermal cyclic fatigue test, the SrAl12O19/YSZ double‐ceramic‐layer coating undertakes a thermal cycling lifetime of ~512 cycles, which is not only much longer than its single‐layer counterpart (~163 cycles), but also superior to that of YSZ coating (~392 cycles). These preliminary results suggest that SrAl12O19 might be a promising alternative TBC material to YSZ for applications above 1200°C.

This paper employs differential scanning calorimetry (DSC) to investigate the reactions of hydroxyl-terminated polybutadiene (HTPB) binder and isophorone isophorone diisocyanate (IPDI) with two different cure catalysts, namely, dibutyl tin dilaurate (DBTDL) and stannous octanoate (TECH). This study evaluates the effects of two cure catalysts (i.e. DBTDL and TECH) on rate constants of the polyurethane cure reactions. Throughput the study, the kinetic parameters and the curing reaction rate equations are obtained. The present work concludes that both catalysts had a catalytic effect on the HTPB-IPDI system, but that the catalytic effect of DBTDL was higher than that of TECH. The binder system with the TECH catalyst displayed a longer pot-life and lower toxicity compared with the DBTDL. Additionally, this study investigates the binder system’s viscosity build-up at 35°C and the viscosity build-up results were in agreement with the DSC analysis results.