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High quality factor graphene varactors for wireless sensing applications.
- Source :
-
Applied Physics Letters . 10/17/2011, Vol. 99 Issue 16, p163105. 3p. 1 Chart, 3 Graphs. - Publication Year :
- 2011
-
Abstract
- A graphene wireless sensor concept is described. By utilizing thin gate dielectrics, the capacitance in a metal-insulator-graphene structure varies with charge concentration through the quantum capacitance effect. Simulations using realistic structural and transport parameters predict quality factors, Q, >60 at 1 GHz. When placed in series with an ideal inductor, a resonant frequency tuning ratio of 25% (54%) is predicted for sense charge densities ranging from 0.32 to 1.6 μC/cm2 at an equivalent oxide thickness of 2.0 nm (0.5 nm). The resonant frequency has a temperature sensitivity, df/dT, less than 0.025%/K for sense charge densities >0.32 μC/cm2. [ABSTRACT FROM AUTHOR]
- Subjects :
- *GRAPHENE
*VARACTORS
*DIELECTRICS
*DETECTORS
*MICROELECTROMECHANICAL systems
Subjects
Details
- Language :
- English
- ISSN :
- 00036951
- Volume :
- 99
- Issue :
- 16
- Database :
- Academic Search Index
- Journal :
- Applied Physics Letters
- Publication Type :
- Academic Journal
- Accession number :
- 66745047
- Full Text :
- https://doi.org/10.1063/1.3651334