▎ 摘　　要

The electronic properties of a metallic nanoparticle coupled to a graphene nanoribbon are discussed. Results for the nanoribbon's electronic structure as well as the system's transport properties are presented. This device is shown to behave as a field effect transistor operating at the single-electron level; its properties could be of utility in a variety of applications such as charge sensing and terahertz photonics.