Single-crystalline graphene radio-frequency nanoswitches

Peng Li, Tianhong Cui

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


Growth of monolayer single-crystalline graphene (SCG) using the low-pressure chemical vapor deposition method is reported. Graphene's superb quality and single-crystalline nature were characterized and verified by Raman microscopy, atomic force microscopy, and carrier mobility measurement. Radio-frequency (RF) nanoelectromechanical switches based on coplanar waveguide double-clamped SCG membrane were achieved, and the superb properties of SCG enable the switches to operate at a pull-in voltage as low as 1 V, with switch time in the nanosecond regime. Owing to their single-crystalline nature, the switches' lifetime (>5000 times) is much longer than that of polycrystalline graphene ones reported. The RF devices exhibit good isolation (-30 dB at 40 GHz (Ka band)), which can be further improved by SCG's conductivity variation due to actuation voltage.

Original languageEnglish (US)
Article number075022
JournalJournal of Micromechanics and Microengineering
Issue number7
StatePublished - Jul 1 2015

Bibliographical note

Publisher Copyright:
© 2015 IOP Publishing Ltd.


  • MEMS
  • RF switch
  • graphene


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