Nonlinear damping in mechanical resonators made from carbon nanotubes and graphene
A. Eichler , J. Moser , J. Chaste , Mariusz Zdrojek , I. Wilson-Rae , A. Bachtold
AbstractThe theory of damping is discussed in Newton's Principia1 and has been tested in objects as diverse as the Foucault pendulum, the mirrors in gravitational-wave detectors and submicrometre mechanical resonators. In general, the damping observed in these systems can be described by a linear damping force. Advances in nanofabrication mean that it is now possible to explore damping in systems with one or more atomic-scale dimensions. Here we study the damping of mechanical resonators based on carbon nanotubes 2-11 and graphene sheets12-15. The damping is found to strongly depend on the amplitude of motion, and can be described by a nonlinear rather than a linear damping force. We exploit the nonlinear nature of damping in these systems to improve the figures of merit for both nanotube and graphene resonators. For instance, we achieve a quality factor of 100,000 for a graphene resonator.
|Journal series||Nature Nanotechnology, ISSN 17483387, (0 pkt)|
|Keywords in English||carbon nanotube; graphene, amplitude modulation; article; controlled study; force; nanoelectromechanical system; priority journal, Electrochemistry; Equipment Design; Graphite; Materials Testing; Motion; Nanotechnology; Nanotubes, Carbon; Nonlinear Dynamics; Stress, Mechanical; Vibration|
|Publication indicators||= 385; = 373|
|Citation count*||214 (2015-06-01)|
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.