The Dynamics of an Externally Driven Nanoscale Beam that is Under High Tension and Immersed in a Viscous Fluid
Published in Journal of Applied Physics, 2022
Recommended citation: J. Barbish, C. Ti, K. L. Ekinci, and M. R. Paul, "The Dynamics of an Externally Driven Nanoscale Beam that is Under High Tension and Immersed in a Viscous Fluid" Journal of Applied Physics, vol. 132, no. 3, p. 034501, Jul. 2022. https://doi.org/10.1063/5.0100462
Abstract: We explore the dynamics of a nanoscale doubly clamped beam that is under high tension, immersed in a viscous fluid, and driven externally by a spatially varying drive force. We develop a theoretical description that is valid for all possible values of tension, includes the motion of the higher modes of the beam, and accounts for a harmonic force that is applied over a limited spatial region of the beam near its ends. We compare our theoretical predictions with experimental measurements for a nanoscale beam that is driven electrothermally and immersed in air and water. The theoretical predictions show good agreement with experiments, and the validity of a simplified string approximation is demonstrated.