The coupling between the piezoelectric and semiconducting properties of nanowires was discovered in 2006 [13], in which the strain-induced piezoelectric polarization was used to tune the conductivity of the nanowire. This effect was called the piezotronic effect, and has been investigated in piezoelectric, semiconducting nanomaterials like ZnO, zinc sulfide (ZnS), cadmium sulfide (CdS), indium nitride (InN), gallium nitride (GaN), and monolayer molybdenum disulfide (MoS 2 ) [14–20]. Mechanical stimuli are ubiquitous and abundant in the environment. The piezotronic effect combines piezoelectric polarization with semiconductor properties and allows the direct and active interaction between devices and stimuli. This new fundamental phenomenon continues to inspire novel device applications and has led to an emerging field called “piezotronics”