Ultrasensitive 2D ZnO Piezotronic Transistor Array for High Resolution Tactile Imaging

In this paper, a new kind of 2D piezotronic transistor (PT) with the highest sensitivity till date has been designed and demonstrated, and the 2DPT array with ultrahigh spatial resolution has been developed through assembling ZnO nanoplatelets into ordered nanoplatelet array. As active sensors by directly converting applied mechanical actuations into electrical control signals without applying gate voltage, the ZnO 2DPT array has a great advantage as a fundamental component of piezotronics. The 2DPT array paves the way for a large‐scale and integrated production of two terminal vertical transistors, which will contribute to its application in many fields such as human–machine interfacing, smart sensor, and processor systems. A new kind of 2D ZnO nanoplatelets based piezotronic transistors (2DPT) array is demonstrated, which exhibits an unprecedented pressure sensitivity of 60.97–78.23 meV MPa−1 and a fast response time of less than 5 ms. The 2DPT array based on self‐assembly of well‐aligned ZnO nanoplatelets shows a high resolution of 12 700 dpi and can achieve adaptive high‐resolution strain mapping.