Effect of Grain Size on Flexoelectricity

Significant hydrogen generation via photo-mechanical coupling in flexible methylammonium lead iodide nanowires

“…In bulk materials, the exoelectric effect is sometimes negligible due to the small strain gradient within the fracture limitation, but it becomes more signicant when the crystal size is shrunk down to the nanoscale. [23][24][25] It is noted that a few studies on exocatalysis of nanomaterials have been reported, mainly focusing on the applications of dye degradation. Zhonglin Wang et al suggested that under ultrasonic excitation, reactive species were created due to strain-gradient-induced exoelectric polarization in MnO 2 nanosheets composed of nanoowers, which could be used to degrade organic pollutants, such as methylene blue.…”