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Fabrication of Three-Dimensional Graphene-Based Polyhedrons via Origami-Like Self-Folding
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Published on: September 23, 2018

Graphene wrinkling: formation, evolution and collapse.

Changguo Wang1, Yuanpeng Liu, Lan Lan

  • 1Center for Composite Materials, Harbin Institute of Technology, Harbin, China. wangcg@hit.edu.cn

Nanoscale
|April 16, 2013
PubMed
Summary
This summary is machine-generated.

Graphene wrinkling initiates internally, not at edges, driven by slack warps. Wrinkling progresses through distinct stages, influenced by aspect ratio but not temperature, leading to collapse via C-C bond breaking.

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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Nanotechnology

Background:

  • Graphene's unique properties make it a candidate for advanced nanomechanical devices.
  • Understanding the mechanics of graphene wrinkling is crucial for its application.
  • Previous studies have explored graphene wrinkling, but internal formation mechanisms require further investigation.

Purpose of the Study:

  • To investigate the formation, evolution, and collapse of graphene wrinkles using molecular dynamics simulations.
  • To analyze the influence of aspect ratio and temperature on graphene wrinkling phenomena.
  • To identify distinct stages in the wrinkling process and their underlying mechanisms.

Main Methods:

  • Molecular dynamics simulations were employed to model graphene wrinkling.
  • Analysis focused on atomic displacement differences to identify wrinkling stages.
  • Parameters such as aspect ratio and temperature were systematically varied.

Main Results:

  • Wrinkling initiates in the interior of graphene, not at the edges, driven by edge slack warps.
  • Wrinkling progresses through five distinct stages: incubation, infancy, youth, maturity, and gerontism.
  • Critical wrinkling strain and pattern depend on aspect ratio; collapse strain is temperature-dependent.

Conclusions:

  • Graphene wrinkling dynamics differ from continuum films, with internal initiation being a key feature.
  • The identified stages provide a framework for understanding wrinkling evolution.
  • Results offer insights for designing graphene-based nanomechanical devices by controlling wrinkles.