Nanotechnology Now

Our NanoNews Digest Sponsors
Heifer International



Home > News > Calculation of graphene's ideal strength confirmed by tests

September 15th, 2008

Calculation of graphene's ideal strength confirmed by tests

Abstract:
In 2007, Prof. MING Pingbing from the CAS Academy of Mathematics and Systems Science and his colleagues made a calculation on the ideal strength of grapheme, a promising carbon material. One year later, their work is verified by an experiment that was reported recently in Science.

Story:
Grapheme, discovered in 2004 by a research team from Manchester University in UK, is a relatively large-scale one-atom thick layer of graphite with remarkable electric characteristics. Experts believe that the nano-transistor made from such a material might greatly raise the operating speed of computers.

The ideal strength refers to the highest achievable strength of a defect-free crystal at 0K. It is a crucial theoretical parameter because it plays a critical role in characterizing the nature of chemical bonding of the crystal. The study of ideal strength can tell us a lot about why some materials are intrinsically brittle, while others are intrinsically ductile.

Via the method of first-principle calculation and teaming up with LIU Fang from the Central University of Finance and Economics in Beijing and LI Ju from the Ohio State University, Ming carried out a careful ab initio study of the ideal tensile strength of flat graphene, as structural motif for carbon nanotubes, nanofibers and other graphene-based materials. The results show that that the value of the monolayer graphene's intrinsic strength is between 110-121GPa, indicating that graphene is the strongest material ever discovered so far.

The results are confirmed by the observation of a research group with the Columbia University in US in the first ever successful experiment to measure the ideal strength of graphene in laboratory. Published by the 18 July issue of Science, the work showed the value was 130±10GPa. These experiments establish graphene as the strongest material ever measured, and show that atomically perfect nanoscale materials can be mechanically tested to deformations well beyond the linear regime.

Experts say that this show that scientific computation can play a critical role in scientific exploration, including the development of new materials.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related News Press

News and information

Biology’s hardest working pigments and ‘MOFs’ might just save the climate: A range of processes that currently depend on fossil fuels but are really hard to electrify will depend on the development of genuinely clean fuels, and for that to happen, much more efficient catalysts wi July 22nd, 2022

Generating power where seawater and river water meet July 22nd, 2022

First electric nanomotor made from DNA material: Synthetic rotary motors at the nanoscale perform mechanical work July 22nd, 2022

At the water’s edge: Self-assembling 2D materials at a liquid–liquid interface: Scientists find a simple way to produce heterolayer coordination nanosheets, expanding the diversity of 2D materials July 22nd, 2022

Discoveries

HKU physicists found signatures of highly entangled quantum matter July 22nd, 2022

How different cancer cells respond to drug-delivering nanoparticles: The findings of a large-scale screen could help researchers design nanoparticles that target specific types of cancer July 22nd, 2022

The best semiconductor of them all? Researchers have found a material that can perform much better than silicon. The next step is finding practical and economic ways to make it July 22nd, 2022

Buckyballs on gold are less exotic than graphene July 22nd, 2022

Materials/Metamaterials

At the water’s edge: Self-assembling 2D materials at a liquid–liquid interface: Scientists find a simple way to produce heterolayer coordination nanosheets, expanding the diversity of 2D materials July 22nd, 2022

Strain-sensing smart skin ready to deploy: Nanotube-embedded coating detects threats from wear and tear in large structures July 15th, 2022

New protocol for assessing the safety of nanomaterials July 1st, 2022

Nanotubes: a promising solution for advanced rubber cables with 60% less conductive filler June 1st, 2022

Announcements

Quantum computer works with more than zero and one: Quantum digits unlock more computational power with fewer quantum particles July 22nd, 2022

Biology’s hardest working pigments and ‘MOFs’ might just save the climate: A range of processes that currently depend on fossil fuels but are really hard to electrify will depend on the development of genuinely clean fuels, and for that to happen, much more efficient catalysts wi July 22nd, 2022

Generating power where seawater and river water meet July 22nd, 2022

First electric nanomotor made from DNA material: Synthetic rotary motors at the nanoscale perform mechanical work July 22nd, 2022

NanoNews-Digest
The latest news from around the world, FREE




  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project