The cornerstone of Complementary Metal-Oxide-Semiconductor (CMOS) technology which came to replace TTL was a type of FET known as the Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET).

References [1] Batteryless NFC Dosimeter Tag for Ionizing Radiation Based on Commercial MOSFET. Sensors and Actuators A Physical (2023).

The RADFET dosimeters are used to measure ionizing radiation. The microscopic small sensor volume in RADFETs offer opportunities for invention of new portable and miniature radiation dosimeters.