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Related Experiment Video

Updated: Jun 21, 2026

Fabrication of Three-Dimensional Graphene-Based Polyhedrons via Origami-Like Self-Folding
14:52

Fabrication of Three-Dimensional Graphene-Based Polyhedrons via Origami-Like Self-Folding

Published on: September 23, 2018

Free-standing epitaxial graphene.

Shriram Shivaraman1, Robert A Barton, Xun Yu

  • 1Cornell Center for Materials Research, Cornell University, Ithaca, New York 14853, USA. ss626@cornell.edu

Nano Letters
|August 12, 2009
PubMed
Summary
This summary is machine-generated.

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Researchers developed a method to create free-standing graphene sheets from silicon carbide (SiC) substrates. This technique enables the fabrication of robust, large-area suspended graphene nanomechanical resonators for advanced applications.

Area of Science:

  • Materials Science
  • Nanotechnology
  • Solid State Physics

Background:

  • Epitaxial graphene grown on silicon carbide (SiC) offers unique electronic and mechanical properties.
  • Producing free-standing graphene structures is crucial for developing advanced nanodevices.
  • Existing methods for releasing graphene can alter its chemical and mechanical integrity.

Purpose of the Study:

  • To develop a reliable method for fabricating free-standing graphene sheets.
  • To create suspended graphene nanomechanical resonators for characterization.
  • To confirm the structural integrity of graphene after the release process.

Main Methods:

  • Utilizing epitaxial graphene grown on silicon carbide (SiC) as the starting material.
  • Patterning doubly clamped nanomechanical resonators with lengths up to 20 micrometers.

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  • Employing optical methods for actuating and detecting the resonant motion of the graphene resonators.
  • Conducting Raman spectroscopy to analyze the chemical composition and structural integrity of the graphene.

    • Main Results:

    • Successfully produced free-standing graphene sheets from epitaxial graphene on SiC.
    • Fabricated doubly clamped nanomechanical resonators with measurable resonant frequencies in the tens of megahertz range.
    • Observed that the resonators are significantly stiffer than anticipated for unstressed beams.
    • Raman spectroscopy confirmed no chemical modification of the graphene during the release process.

    Conclusions:

    • The developed technique is a robust method for fabricating large-area suspended graphene structures.
    • The fabricated graphene resonators exhibit high stiffness, suggesting potential for high-frequency applications.
    • The method preserves the chemical integrity of graphene, making it suitable for sensitive electronic and mechanical devices.