Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Transformation of Plane Strain01:12

Transformation of Plane Strain

625
When analyzing elongated structures like bars subjected to uniformly distributed loads, it is essential to understand the transformation of plane strain when coordinate axes are rotated. This transformation helps to assess how material deformation characteristics vary with orientation, which is crucial in materials science and structural engineering.
Under plane strain conditions, typical for members where one dimension significantly exceeds the others, deformations and resultant strains are...
625
Three-Dimensional Analysis of Strain01:29

Three-Dimensional Analysis of Strain

735
Three-dimensional strain analysis is crucial for understanding how materials deform under stress, particularly in elastic, homogeneous materials. This method employs principal stress axes to simplify complex stress states into more understandable forms. Subjected to stress, a small cubic element within a material either expands or contracts along these axes, transforming into a rectangular parallelepiped. This transformation effectively illustrates the material's deformation. The principal...
735
Shearing Strain01:20

Shearing Strain

1.9K
The shearing strain represents a cubic element's angular change when subjected to shearing stress. This type of stress can transform a cube into an oblique parallelepiped without influencing normal strains. The cubic element experiences a significant transformation when exposed solely to shearing stress. Its shape alters from a perfect cube into a rhomboid, clearly demonstrating the effect of shearing strain. The degree of this strain is considered positive if it reduces the angle between the...
1.9K
Elastic Strain Energy for Shearing Stresses01:20

Elastic Strain Energy for Shearing Stresses

623
As discussed in previous lessons, strain energy in a material is the energy stored when it is elastically deformed, a concept crucial in materials science and mechanical engineering. This energy results from the internal work done against the cohesive forces within the material. When a material undergoes shearing stress and corresponding shearing strain, the strain energy density, which is the energy stored per unit volume, is calculated. Within the elastic limit, where the stress is...
623
Conformations of Cycloalkanes02:29

Conformations of Cycloalkanes

16.8K
Adolf von Baeyer attempted to explain the instabilities of small and large cycloalkane rings using the concept of angle strain — the strain caused by the deviation of bond angles from the ideal 109.5° tetrahedral value for sp3  hybridized carbons. However, while cyclopropane and cyclobutane are strained, as expected from their highly compressed bond angles, cyclopentane is more strained than predicted, and cyclohexane is virtually strain-free. Hence, Baeyer’s theory that...
16.8K
Stress-Strain Diagram - Ductile Materials01:24

Stress-Strain Diagram - Ductile Materials

2.6K
The stress-strain relationship in ductile materials such as structural steel or aluminium is intricate and progresses through several stages. When a specimen is loaded, it initially exhibits a linear length increase, depicted by a steep straight line on the stress-strain diagram. It indicates the material is elastically deforming and will return to its original shape once unloaded. However, when a critical stress value is reached, plastic deformation begins. This stage sees substantial...
2.6K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Unlocking Zn-Ion Diffusion in Disordered Rocksalt Cathodes for Nonaqueous Zn-Ion Batteries.

Angewandte Chemie (International ed. in English)·2026
Same author

Nanoengineering Interfacial Reconstruction in Cu<sub>2</sub>O@SiO<sub>2</sub> Catalysts to Tune C-C Coupling and Deep Hydrogenation in CO<sub>2</sub> Electroreduction.

ACS applied materials & interfaces·2026
Same author

Electrochemically Induced Oxide-to-Hydroxide Transformation Enables Fast Proton Transport for Enhanced Hydrogen Evolution.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)·2026
Same author

Sm(OH)<sub>3</sub>-Modified CuO<sub><i>x</i></sub>-Promoted Electroreduction of CO<sub>2</sub>-to-C<sub>2+</sub> Products through a Proton-Regulated Mechanism.

ACS applied materials & interfaces·2026
Same author

Understanding the Role of Triple Phase Boundaries on Coating-Free Solid-State Cathodes.

ACS energy letters·2026
Same author

Quantitative Nanoscale Structure Determination in Polymer Desalination Membranes by Correlated Electron Tomography and Spectroscopy.

ACS nano·2026

Related Experiment Video

Updated: Apr 6, 2026

Fabricating van der Waals Heterostructures with Precise Rotational Alignment
09:25

Fabricating van der Waals Heterostructures with Precise Rotational Alignment

Published on: July 5, 2019

10.3K

Atomic Level Distributed Strain within Graphene Divacancies from Bond Rotations.

Qu Chen1, Alex W Robertson1, Kuang He1

  • 1Department of Materials, University of Oxford , Parks Road, Oxford OX1 3PH, United Kingdom.

ACS Nano
|July 24, 2015
PubMed
Summary

Understanding graphene defects is key. This study reveals how divacancy structural changes, driven by bond rotations, minimize strain in graphene, crucial for accurate defect modeling.

Keywords:
DFTTEMaberration correctiondefectsdivacancygraphene

More Related Videos

Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
09:06

Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope

Published on: March 24, 2019

8.7K
Optimized Fabrication Procedure for High-Quality Graphene-based Moir&#233; Superlattice Devices
11:24

Optimized Fabrication Procedure for High-Quality Graphene-based Moiré Superlattice Devices

Published on: July 11, 2025

17.4K

Related Experiment Videos

Last Updated: Apr 6, 2026

Fabricating van der Waals Heterostructures with Precise Rotational Alignment
09:25

Fabricating van der Waals Heterostructures with Precise Rotational Alignment

Published on: July 5, 2019

10.3K
Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
09:06

Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope

Published on: March 24, 2019

8.7K
Optimized Fabrication Procedure for High-Quality Graphene-based Moir&#233; Superlattice Devices
11:24

Optimized Fabrication Procedure for High-Quality Graphene-based Moiré Superlattice Devices

Published on: July 11, 2025

17.4K

Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Nanotechnology

Background:

  • Vacancy defects significantly impact graphene properties.
  • Accurate models require detailed understanding of defect atomic structures.
  • Divacancies (DVs) are common graphene defects with multiple structural configurations.

Purpose of the Study:

  • To resolve the atomic structure of graphene divacancies.
  • To measure C-C bond lengths within different DV configurations.
  • To generate a bond strain map for DVs.

Main Methods:

  • Aberration-corrected transmission electron microscopy (TEM).
  • Monochromatized electron source for high-resolution imaging.
  • Measurement of C-C bond lengths within divacancies.

Main Results:

  • Resolved atomic positions of carbon atoms in graphene DVs.
  • Measured varying C-C bond lengths across different DV structures.
  • Generated a detailed map of bond strain within DVs.
  • Observed that bond rotations reduce peak strain and distribute it over more bonds.

Conclusions:

  • Structural variations in graphene divacancies influence strain distribution.
  • Bond rotations are a key mechanism for minimizing strain energy in DVs.
  • Findings aid in developing more accurate predictive models for graphene defect behavior.