Graphene is an emerging material for nanoelectromechanical systems (NEMS) due to its intriguing electronic properties and promising mechanical character. However, intrinsic graphene has long been considered devoid of piezoelectric effect which restricts its electromechanical coupling ability. We report on a giant two-dimensional (2D) piezoelectric effect on an intrinsic graphene-based NEMS platform, which results from dynamical adjustment of band structure-induced polarization instead of occurrence of electric dipoles at the molecular level. These findings not only open an avenue for dynamical strain-engineered 2D electronics, but also pave the way for low-cost sensing and energy harvesting applications.
- Xiaomu Wang
- He Tian
- Tian-Ling Ren
