Figure 30. (a) Schematic diagram of the AlGaN/GaN HEMT based pH sensor device section (b) Micrograph of the device [84]

From

Review of GaN Nanowires Based Sensors

Ahmed M. Nahhas

American Journal of Nanomaterials. 2020, 8(1), 32-47 doi:10.12691/ajn-8-1-4