Research & Development World

  • R&D World Home
  • Topics
    • Aerospace
    • Automotive
    • Biotech
    • Careers
    • Chemistry
    • Environment
    • Energy
    • Life Science
    • Material Science
    • R&D Management
    • Physics
  • Technology
    • 3D Printing
    • A.I./Robotics
    • Software
    • Battery Technology
    • Controlled Environments
      • Cleanrooms
      • Graphene
      • Lasers
      • Regulations/Standards
      • Sensors
    • Imaging
    • Nanotechnology
    • Scientific Computing
      • Big Data
      • HPC/Supercomputing
      • Informatics
      • Security
    • Semiconductors
  • R&D Market Pulse
  • R&D 100
    • Call for Nominations: The 2025 R&D 100 Awards
    • R&D 100 Awards Event
    • R&D 100 Submissions
    • Winner Archive
    • Explore the 2024 R&D 100 award winners and finalists
  • Resources
    • Research Reports
    • Digital Issues
    • R&D Index
    • Subscribe
    • Video
    • Webinars
  • Global Funding Forecast
  • Top Labs
  • Advertise
  • SUBSCRIBE

The Deformation and Mechanics of One-Atom Thin Layer Materials

By Science China Press | June 20, 2018

This is an illustration of the ultra-soft deformation in a graphene sheet. Such a feature leads to the easy formation of fullerence and carbon nanotubes from graphene sheets. Such a process may involve the formation of defects in graphene which in turn alters the morphology and the deformation behavior of graphene. Credit: Science China Press

In terms of the attention that graphene has been received in the past decade, no single material is comparable. As the interest and enthusiasm in graphene research continue, it calls for critical examination on the reliability and durability of graphene-enabled applications; the mechanics of graphene hence becomes essential to address related issues.

In practice, defects resulted from thermodynamics or introduced by fabrication, naturally or artificially, play the pivotal role in the mechanical behaviors of graphene. More importantly, high strength is just one aspect of graphene’s magnificent mechanical properties: Its one-atom thin nature leads to ultra-low bending rigidity and gives rise to rich morphology and is crucial for morphology control.

In a new review article published in the Beijing-based National Science Review, scientists at the Institute of Mechanics, Chinese Academy of Sciences, Beijing, China and the University of Colorado, Boulder, USA present the latest theoretical advances in nanomechanics of graphene. Co-authors Yujie Wei and Ronggui Yang summarized the current advances on the mechanics of defects in graphene, and the theory to capture the out-of-plane deformation. They reviewed the structure-mechanical property relationship in graphene, in terms of its elasticity, strength, bending, and wrinkling, with or without the influence of imperfections.

These scientists likewise outline some challenges and the potential research directions on nanomechanics of graphene.

“The intrinsic strength of monolayer graphene is about 100 GPa, at least two orders of magnitude greater than most engineering materials. The strong material is also soft in nature: graphene can be easily bent to form rich three-dimensional morphology under either mechanical or even thermal undulation. Such striking characteristics render graphene of potential applications ranging from nanoscale systems to macroscopic composite materials.”

“Due to thermodynamics, large area graphene is also defective. The thermally activated defects are generally of low energy level, like point vacancy and 5-7-7-5 rings, and 5-8-5 rings. Large ones include grain boundaries and free edges. The mechanics of those typical defects in graphene and their influence on the strength are the central tasks to address the structure – mechanical property relationship of graphene.”

When the strain energy resulted from thermal mismatch is large enough to overcome their adhesion, the graphene layer buckles to form wrinkles, relaxes its in-plane compression at the expenses of interfacial energy due to delamination and bending energy in wrinkles. The wrinkles can form during both the growth and the transfer process which are very hard to release.

The wrinkling of graphene could be described using the continuum theory for thin elastic sheets. They state.

“For graphene grown or transferred to a substrate, wrinkling of the ultra-thin member may occur during the competition of bending and decohesion. Both features are of importance as the morphology strongly affect the performance of such graphene sheet. A precise prediction on the morphology and its manipulations relies on an accurate description of the vdW interaction between graphene and the substrate, which is far from being reached and is desired for the commonly known fact that the accuracy of an atomistic simulation is by far no better than the potential one uses.” the scientists forecast.

“Since graphene is thought to be the strongest among all known materials, it is desirable to use such low-dimensional carbon structures as building blocks to realize three-dimensional (3-D) engineering materials and structures which may inherit their superb properties. In reality, the scale-up leads to a substantial degradation of properties that we desire to retain. The huge gap originates from the dissimilar bonding characteristics between carbon atoms within graphene or CNTs and the architected 3-D engineering materials: The intra-structure bonding is covalent in nature, while van der Waals bonding dominates between different layers/tubes or with other materials,” they add. “To fully utilize the amazing mechanical properties of graphene in engineering application of graphene, there remain many challenges to be addressed. It is unfortunate while lots of researchers focus on the bright side of graphene, the mechanics people are more concerned about the reliability and durability of the material in engineering practice which stand out one material from its competitors.”

Related Articles Read More >

A new wave of metalworking lets semiconductor crystals bend and stretch
SLAC–Stanford team captures protein‑free RNA megastructures in bacteria
Visible‑light photoenzymes craft drug‑relevant β‑lactams and cyclobutanes in ordinary air
SOCMA poll: 59% of specialty chemical firms skip stockpiling despite tariff threat, leaving R&D supply questions
rd newsletter
EXPAND YOUR KNOWLEDGE AND STAY CONNECTED
Get the latest info on technologies, trends, and strategies in Research & Development.
RD 25 Power Index

R&D World Digital Issues

Fall 2024 issue

Browse the most current issue of R&D World and back issues in an easy to use high quality format. Clip, share and download with the leading R&D magazine today.

Research & Development World
  • Subscribe to R&D World Magazine
  • Enews Sign Up
  • Contact Us
  • About Us
  • Drug Discovery & Development
  • Pharmaceutical Processing
  • Global Funding Forecast

Copyright © 2025 WTWH Media LLC. All Rights Reserved. The material on this site may not be reproduced, distributed, transmitted, cached or otherwise used, except with the prior written permission of WTWH Media
Privacy Policy | Advertising | About Us

Search R&D World

  • R&D World Home
  • Topics
    • Aerospace
    • Automotive
    • Biotech
    • Careers
    • Chemistry
    • Environment
    • Energy
    • Life Science
    • Material Science
    • R&D Management
    • Physics
  • Technology
    • 3D Printing
    • A.I./Robotics
    • Software
    • Battery Technology
    • Controlled Environments
      • Cleanrooms
      • Graphene
      • Lasers
      • Regulations/Standards
      • Sensors
    • Imaging
    • Nanotechnology
    • Scientific Computing
      • Big Data
      • HPC/Supercomputing
      • Informatics
      • Security
    • Semiconductors
  • R&D Market Pulse
  • R&D 100
    • Call for Nominations: The 2025 R&D 100 Awards
    • R&D 100 Awards Event
    • R&D 100 Submissions
    • Winner Archive
    • Explore the 2024 R&D 100 award winners and finalists
  • Resources
    • Research Reports
    • Digital Issues
    • R&D Index
    • Subscribe
    • Video
    • Webinars
  • Global Funding Forecast
  • Top Labs
  • Advertise
  • SUBSCRIBE