Web Release Date: October 30,
Template-Grown Metal Nanowires as Resonators: Performance and Characterization of Dissipative and Elastic Properties
and
Department of Electrical Engineering, Department of Chemistry, Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania 16802
Received June 13, 2007
Revised August 22, 2007
Abstract:
Metal resonators can significantly extend the scope of nanoelectromechanical systems (NEMS) through access to a broader range of electrical, thermal, and surface properties. The material behavior of template-electrodeposited gold (Au) and rhodium (Rh) nanowires (NWs) and their performance as resonators was investigated. Nanowire integration by a bottom-up assembly scheme enabled creation of fixed-free metal beams without distortion or tension. Surprisingly, even a soft metal such as Au yielded viable nanocantilever resonators, with Q-factors of 600-950 in high vacuum, while stiffer RhNW had Q-factors of 1100-1300. NWs with diameter ~300 nm yield Young's modulus values of 44 ± 12 GPa for Au and 222 ± 70 GPa for Rh, both lower than bulk values. This observation is in agreement with two other measurement techniques.
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