Electromigration of bivalent functional groups on graphene
arXiv:1401.1196 · doi:10.1103/PhysRevB.89.155414
Abstract
Chemical functionalization of graphene holds promise for various applications ranging from nanoelectronics to catalysis, drug delivery, and nano-assembly. In many of these applications it is critical to assess the rates of electromigration - directed motion of adsorbates along the surface of current-carrying graphene due to the electron wind force. In this paper, we develop an accurate analytical theory of electromigration of bivalent functional groups (epoxide, amine) on graphene. Specifically, we carefully analyze various factors contributing to the electron wind force, such as lattice effects and strong scattering beyond Born approximation, and derive a simple analytical expression for this force. Further, we perform accurate electronic structure theory calculations to parameterize the obtained analytical expression. The obtained results can be generalized to different functional groups and adsorbates, e.g., alkali atoms on graphene.
accepted to Phys. Rev. B
References in corpus (8)
- Electric Field Effect in Atomically Thin Carbon Films
- The electronic properties of graphene
- Chemical functionalization of graphene with defects
- Vacuum Polarization and Screening of Supercritical Impurities in Graphene
- Atomic Collapse and Quasi-Rydberg States in Graphene
- Screening of Coulomb Impurities in Graphene
- Coulomb impurity in graphene
- Peierls-type Instability and Tunable Band Gap in Functionalized Graphene