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Performance of Monolayer Graphene Nanomechanical Resonators with Electrical Readout
- Publication Year :
- 2009
-
Abstract
- The enormous stiffness and low density of graphene make it an ideal material for nanoelectromechanical applications. Here, we demonstrate the fabrication and electrical readout of monolayer graphene resonators, and test their response to changes in mass and temperature. The devices show resonances in the megahertz range, and the strong dependence of resonant frequency on applied gate voltage can be fitted to a membrane model to yield the mass density and built-in strain of the graphene. Following the removal and addition of mass, changes in both density and strain are observed, indicating that adsorbates impart tension to the graphene. On cooling, the frequency increases, and the shift rate can be used to measure the unusual negative thermal expansion coefficient of graphene. The quality factor increases with decreasing temperature, reaching approximately 1 x 10(4) at 5 K. By establishing many of the basic attributes of monolayer graphene resonators, the groundwork for applications of these devices, including high-sensitivity mass detectors, is put in place.
- Subjects :
- Materials science
Fabrication
Condensed Matter - Mesoscale and Nanoscale Physics
business.industry
Graphene
Biomedical Engineering
FOS: Physical sciences
Bioengineering
Nanotechnology
Molecular nanotechnology
Physicist
Condensed Matter Physics
Atomic and Molecular Physics, and Optics
law.invention
Resonator
Negative thermal expansion
law
Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
Optoelectronics
General Materials Science
Electrical and Electronic Engineering
Photonics
business
Graphene nanoribbons
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....eba9f07ac25cbe295526825c97d40f96