General

Ideal strength of graphene

Ideal strength of graphene

The calculation of the ideal resistance of graphene has been confirmed by tests.

Summary:

In 2007, Prof. One year later, his work was verified by an experiment recently published in the journal Science.

History:

Graphene, discovered in 2004 by a research team at the University of Manchester in the United Kingdom, is a relatively large layer of graphite, one atom thick, with exceptional electrical characteristics. Experts believe that the nanotransistor made of such a material could greatly increase the operating speed of computers.

Ideal resistance refers to the highest possible resistance of a crystal without defects at 0K. It is a crucial theoretical parameter since it plays a fundamental role in characterizing the nature of the chemical bond in the crystal. The study of ideal strength can tell us a lot about why some materials are intrinsically brittle, while others are intrinsically ductile.

Together with LIU Fang of Beijing Central University of Finance and Economics and LI Ju of Ohio State University, Ming carried out a careful elementary study of the ideal tensile strength of flat graphene as a structural motif of carbon nanotubes, nanofibers, and other graphene-based materials. The results indicate that the intrinsic strength value of monolayer graphene is between 110-121GPa, indicating that graphene is the strongest material discovered to date.

The results have been confirmed by the observation of a research group in collaboration with Columbia University, USA, in the first successful experiment to measure the ideal resistance of graphene in the laboratory. Published in the July 18 issue of the journal Science, the work showed the value to be 130 ± 10GPa. These experiments consolidate graphene as the most resistant material measured to date, and indicate that it is possible to mechanically check the deformations of materials at the atom-perfect nanoscale, beyond the linear regime.

According to experts, this indicates that scientific computing may play a critical role in scientific exploration, including the development of new materials.

Source: Nanotechnology Now News


Video: GRAPHYNE - What is STRONGER than Graphene? - Explained in 3 min (September 2020).