4 years ago

From mesoscale to nanoscale mechanics in single-wall carbon nanotubes

From mesoscale to nanoscale mechanics in single-wall carbon nanotubes
The analysis of the radial collapse of individualized and isolated single-wall carbon nanotubes under high pressure as function of their diameter, d, distinguishes their mesoscale and their nanoscale mechanics. The evolution with pressure of the Raman spectra for nine tube chiralities and the theoretical modelling reveal a deviation from the continuum mechanics prediction of a collapse pressure P C d 3 . Nanotubes show a normalized collapse pressure P N = P C d 3 = 24 α D ( 1 β 2 / d 2 ) both in experiment and in very different theoretical models. In this expression β = 0.44 ± 0.04 nm represents the smallest diameter for a stable freestanding single-wall carbon nanotube and D is the bending stiffness of graphene. From the experimental data D = 1.7 ± 0.2 eV . Deviations from the continuum mechanics predictions start to be of significance for diameters smaller than 1 nm . The associated reduction of their collapse pressure is attributed to the discretization of the elastic compliances around the circumference of the tubes.

Publisher URL: www.sciencedirect.com/science

DOI: S0008622317307194

You might also like
Discover & Discuss Important Research

Keeping up-to-date with research can feel impossible, with papers being published faster than you'll ever be able to read them. That's where Researcher comes in: we're simplifying discovery and making important discussions happen. With over 19,000 sources, including peer-reviewed journals, preprints, blogs, universities, podcasts and Live events across 10 research areas, you'll never miss what's important to you. It's like social media, but better. Oh, and we should mention - it's free.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.