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Few-hundred GHz carbon nanotube nanoelectromechanical systems (NEMS).

Author(s): Island JO, Tayari V, McRae AC, Champagne AR

Nano Lett. 2012 Sep 12;12(9):4564-9 Authors: Island JO, Tayari V, McRae AC, Champagne AR

Article GUID: 22888989
Tailoring 10 nm scale suspended graphene junctions and quantum dots.

Author(s): Tayari V, McRae AC, Yigen S, Island JO, Porter JM, Champagne AR

Nano Lett. 2015 Jan 14;15(1):114-9 Authors: Tayari V, McRae AC, Yiğen S, Island JO, Porter JM, Champagne AR

Article GUID: 25490053
Title:Few-hundred GHz carbon nanotube nanoelectromechanical systems (NEMS).
Authors:Island JO,  Tayari V,  McRae AC,  Champagne AR
Link:https://www.ncbi.nlm.nih.gov/pubmed/22888989?dopt=Abstract
Category:Nano Lett
PMID:22888989
Dept Affiliation: PHYSICS
1 Department of Physics, Concordia University, Montréal, Québec, H4B 1R6, Canada.

Description:

Few-hundred GHz carbon nanotube nanoelectromechanical systems (NEMS).

Nano Lett. 2012 Sep 12;12(9):4564-9

Authors: Island JO, Tayari V, McRae AC, Champagne AR

Abstract

We study 23-30 nm long suspended single-wall carbon nanotube quantum dots and observe both their stretching and bending vibrational modes. We use low-temperature DC electron transport to excite and measure the tubes' bending mode by making use of a positive feedback mechanism between their vibrations and the tunneling electrons. In these nanoelectromechanical systems (NEMS), we measure fundamental bending frequencies f(bend) ˜ 75-280 GHz and extract quality factors Q ~ 10(6). The NEMS's frequencies can be tuned by a factor of 2 with tension induced by mechanical breakjunctions actuated by an electrostatic force or tension from bent suspended electrodes.

PMID: 22888989 [PubMed - indexed for MEDLINE]