Molecular switches have attracted increasing interest in the past decades, due to their broad applications in data storage, optical gating, smart windows, and so on. However, up till now, most of the ...

This paper presents air-coupled piezoelectric micromachined ultrasonic transducers (PMUTs) fabricated from single-crystal PZT, enabling very high sound pressure level (SPL) output of 100.3 dB at 33 cm ...