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A skin-like stretchable multi-functional sensor array based on a combination of PU foam and MWCNT-PANI nanocomposite is demonstrated to simultaneously detect pressure, temperature and ammonia gas with high sensitivity. The integrated sensor array with printed liquid metal interconnections operates stably under applied strain due to its attachment to the skin and under a biaxial strain up to 50%.
Nanostructural modifications, in particular nanoparticle (NP) additions, have been shown to have great success in improving energy-related material performance. We show how an economically viable method, namely metal organic deposition, can be used to obtain tunable small size (7 nm) and high number density NPs (8 × 1022 m−3) while maintaining the crystallinity of the perovskite-composite cuprate superconductor film matrix. Critical current density Jc(H) measurements demonstrate that the NPs are highly effective as pinning centers, decreasing vortex motion and fluctuation effects for all temperatures, magnetic field strengths and orientations measured. Our synthesis method can be applied to other perovskite-composite materials to improve their functionality.
An accurate method, with detailed analytical equations, is developed to extract the spin–orbit (SO) effective fields through analysis of the results of harmonic Hall voltage measurements. Both the z component of the applied magnetic field (its directions, together with the axes and the Hall bars, are shown in the left figures) and the second-order perpendicular magnetic anisotropy are taken into account. The contour plots (right figures) showing the deviation (in %) from input values of the damping-like (ΔHDL) and field-like (ΔHFL) SO effective fields clearly demonstrate a significant improvement in the accuracy of the results obtained from the new refined method.
Iron oxides were designed to the rice-grain-shaped hollow structures with hierarchical pores and highly aligned nano/micro-structures using silk fibrous templates to impose multi-functional materials for the electrocatalysts for Li-O2 batteries and the adsorbents of organic pollutants.
