Ultrahigh Sensitive Piezotronic Strain Sensors Based on a ZnSnO 3 Nanowire/ Microwire †,‡ Cheng-YingChen, †,^ YanZhang, † Kuan-HsuehChen, ‡ YaYang, † YoufanHu, † Jr-HauHe, ^ and

We demonstrated a flexible strain sensor based on ZnSnO3 nanowires/microwires for the first time. High-resolution transmission electron microscopy indicates that the ZnSnO3belongs to a rhombohedral structure with an R3c space group and is grown along the [001] axis. On the