Torsional Resonators Based on Inorganic Nanotubes.

Authors :: Divon Y
Levi R
Garel J
Golberg D
Tenne R
Ya'akobovitz A
Joselevich E
Source :: Nano letters [Nano Lett] 2017 Jan 11; Vol. 17 (1), pp. 28-35. Date of Electronic Publication: 2016 Dec 29.
Publication Year :: 2017
Abstract: We study for the first time the resonant torsional behaviors of inorganic nanotubes, specifically tungsten disulfide (WS <subscript>2</subscript> ) and boron nitride (BN) nanotubes, and compare them to that of carbon nanotubes. We have found WS <subscript>2</subscript> nanotubes to have the highest quality factor (Q) and torsional resonance frequency, followed by BN nanotubes and carbon nanotubes. Dynamic and static torsional spring constants of the various nanotubes were found to be different, especially in the case of WS <subscript>2</subscript> , possibly due to a velocity-dependent intershell friction. These results indicate that inorganic nanotubes are promising building blocks for high-Q nanoelectromechanical systems (NEMS).