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In this review, we summarize the synthetic strategies of yolk–shell structured nanoparticles (YSNs) and their catalytic applications including chemical catalysis, photocatalysis and electrocatalysis.

We explore the axionic dark matter search sensitivity with a narrow-band detection scheme aiming at the axion-photon conversion by the static electric field inside a cylindrical capacitor. An alternating magnetic field signal is induced by effective currents as the axion dark matter flows perpendicularly through the electric field. At low axion masses, like in a KKLT scenario, front-end narrow band filtering is provided by using LC resonance with a high Q factor, which enhances the detectability of the tiny magnetic field signal and also leads to a thermal noise as the major background that can be reduced at cryogenic conditions. We demonstrate that high gaγ sensitivity can be achieved by using a strong electric field. The QCD axion theoretical parameter space can be reached with high E ∼ GVm −1 field strength. Using the static electric field scheme essentially avoids exposing the sensitive superconducting pickup to an applied laboratory magnetic field.

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