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An impedance measurement technique that is based on dielectric excitation at specific frequencies can improve the performance of semiconducting metal oxide gas sensors, providing a linear sensing signal over a wide range of gas concentrations. The cover shows a photograph of an integrated circuit impedance analyser (front) and three gas-sensing chips that can be used in the measurements.
This Review Article examines the development of non-magnetic non-reciprocal electronics with a focus on devices based on temporal modulation, including approaches based on temporal modulation of permittivity and conductivity, as well as superconducting components for applications in quantum computing.
By embedding silver nanoparticles in the electron transport layer, solution-processed quantum-dot-based photodetectors with a high photon-to-electron conversion efficiency of 6.5% and a low turn-on voltage of 2.5 V can be created for use in infrared imaging applications.
A parity–time symmetric circuit that uses a switch-mode amplifier and current-sensing phase-delay feedback can wirelessly transfer around 10 W of power to a moving device with a nearly constant total efficiency of 92%.