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Related Experiment Video

Updated: Oct 17, 2025

Fabrication of Gate-tunable Graphene Devices for Scanning Tunneling Microscopy Studies with Coulomb Impurities

Fabrication of Gate-tunable Graphene Devices for Scanning Tunneling Microscopy Studies with Coulomb Impurities

Published on: July 24, 2015

Graphene-Based Nanoelectromechanical Periodic Array with Tunable Frequency.

Qing-Hang Zhang^1,2, Yue Ying^1,2, Zhuo-Zhi Zhang^1,2

¹CAS Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei, Anhui 230026, China.

|October 6, 2021

Summary

This summary is machine-generated.

Researchers created a graphene-based phononic crystal (PnC) device. This nanoelectromechanical system demonstrates electrically tunable resonant frequencies, paving the way for advanced phononic applications.

Keywords:

Graphene electrically tunable nanoelectromechanical periodic array phononic crystals

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Last Updated: Oct 17, 2025

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Area of Science:

Solid-state physics
Materials science
Nanotechnology

Background:

Phononic crystals (PnCs) offer potential for controlling phonon propagation and dissipation.
Graphene's unique electrical and mechanical properties make it suitable for nanoelectromechanical systems (NEMS).

Purpose of the Study:

To demonstrate a novel nanoelectromechanical phononic crystal (PnC) using graphene.
To investigate the electrical tunability of resonant frequencies in such a device.

Main Methods:

Fabrication of a 9x9 array of standing nanopillars.
Anchoring a graphene membrane onto the nanopillar array to form a PnC.
Electrical tuning of resonant frequencies using a gate electrode.

Main Results:

The device exhibited a quasi-continuous frequency spectrum from ~120 MHz to ~980 MHz.
Resonant frequencies were successfully tuned by electrical gating.
Simulations supported the formation of a PnC with band-like spectral characteristics.

Conclusions:

The demonstrated graphene-based NEMS architecture provides experimental evidence of PnC formation.
The device offers a flexible platform for studying phononic crystals with electrical tunability.
This work opens avenues for on-chip phononic devices with accessible and tunable properties.