A semiflexible polymer ring acting as a nano-propeller |
| |
Authors: | H Wada |
| |
Institution: | (1) Yukawa Institute for Theoretical Physics, Kyoto University, 606-8502 Kyoto, Japan |
| |
Abstract: | The dynamics of a rotating elastic nano-ring driven in a viscous fluid by an externally applied torque about a specific axis
is studied using elasto-hydrodynamic simulations. We show that a helical deformation of the ring filament is excited, and
that this leads to directed propulsion which is independent of the direction of rotation. It is found that the propulsive
force and efficiency initially increase as the torque is increased, and then decrease discontinuously at a buckling transition
at a critical torque. This unique propulsive behavior at the shape transition arises due to its specific geometry, i.e., circularity of an elastic filament. The implications of the behavior for artificial microscopic devices are discussed. |
| |
Keywords: | PACS" target="_blank">PACS 47 63 mf Low-Reynolds-number motions 87 16 Ka Filaments microtubules their networks and supramolecular assemblies 47 20 Ky Nonlinearity bifurcation and symmetry breaking |
本文献已被 SpringerLink 等数据库收录! |
|