Place: Kleiner Physik-Hörsaal, Geschwister-Scholl-Platz
Date: 29.01.10, Time: 15:30 h
ElectroMechanical Resonators based on Nanotube and Graphene
Prof. Adrian Bachtold
Centre Investigacions Nanociencia Nanotecnologia (CSIC-ICN) Barcelona
Carbon nanotubes and graphene offer unique scientific and technological opportunities as nanoelectromechanical systems (NEMS). Namely, they have allowed the fabrication of mechanical resonators that can be operable at ultra-high frequencies and that can be employed as ultra-sensitive sensors of mass or charge. In addition, nanotubes and graphene have exceptional electron transport properties, including ballistic conduction over long distances. Coupling the mechanical motion to electron transport in these remarkable materials is thus highly appealing. In this talk, I will review some of our group's recent results on nanotube and graphene NEMSs, including initial mass sensing with nearly atomic resolution, imaging ultra-rapid mechanical oscillations of nanotube and graphene resonators with an atomic force microscope, and the control of the mechanical oscillation using individual electrons tunneling onto and out of the nanotube.