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Two-dimensional shape memory graphene oxide.

Zhenyue Chang1,2, Junkai Deng3, Ganaka G Chandrakumara1,2

  • 1Department of Mechanical and Aerospace Engineering, Monash University, Clayton, Victoria 3800, Australia.

Nature Communications
|June 22, 2016
PubMed
Summary
This summary is machine-generated.

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Researchers discovered a shape memory effect in two-dimensional graphene oxide (C8O). This atomically thin material exhibits a 14.5% recoverable strain, enabling programmable micro-/nano-electromechanical devices.

Area of Science:

  • Materials Science
  • Nanotechnology
  • Solid State Physics

Background:

  • Stimuli-responsive shape memory materials are crucial for micro-/nano-technologies.
  • Conventional shape memory materials lose their effect at the nanoscale.

Purpose of the Study:

  • To investigate nanoscale shape memory effects.
  • To discover novel 2D materials with shape memory properties.

Main Methods:

  • Density functional theory (DFT) calculations were employed.
  • Phase transitions in graphene oxide (C8O) were analyzed.

Main Results:

  • A shape memory effect was discovered in a 2D graphene oxide crystal (C8O).
  • A maximum recoverable strain of 14.5% was achieved through reversible phase transitions.

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  • Co-existence of two stable phases allows for programmable shape construction.

    • Conclusions:

    • Atomically thin graphene oxide exhibits significant shape memory properties.
    • This discovery enables the development of advanced micro-/nano-electromechanical systems (MEMS/NEMS).
    • Electric field stimulus offers a pathway for device control.