Propulsion with a Rotating Elastic Nanorod
Manoel Manghi,1 Xaver Schlagberger,2 and Roland R. Netz2
1Laboratoire de Physique ThÃ‚Â´eorique, IRSAMC, UniversitÃ‚Â´e Paul Sabatier, 31062 Toulouse, France
2Physik Department, Technical University Munich, 85748 Garching, Germany
(Dated: February 9, 2006)
ABSTRACT: The dynamics of a rotating elastic filament is investigated using Stokesian simulations. The filament, straight and tilted with respect to its rotation axis for small driving torques, undergoes at a critical torque a strongly discontinuous shape bifurcation to a helical state. It induces a substantial forward propulsion whatever the sense of rotation: a nanomechanical force-rectification device is established.