The dynamics of an externally driven nanoscale beam that is under high tension and immersed in a viscous fluid

Author:

Barbish J.1ORCID,Ti C.2ORCID,Ekinci K. L.2ORCID,Paul M. R.1ORCID

Affiliation:

1. Department of Mechanical Engineering, Virginia Tech, Blacksburg, Virginia 24061, USA

2. Department of Mechanical Engineering, Division of Materials Science and Engineering, and the Photonics Center, Boston University, Boston, Massachusetts 02215, USA

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.

Funder

National Science Foundation

Publisher

AIP Publishing

Subject

General Physics and Astronomy

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