We report on the mechanical behavior of a dense brush of small-diameter (1–3 nm) non-catalytic multiwall (2–4 walls) carbon nanotubes (CNTs), with ~10 times higher density than CNT brushes produced by other methods. Under compression with spherical indenters of different radii, these highly dense CNT brushes exhibit a higher modulus (~17–20 GPa) and orders of magnitude higher resistance to buckling than vapor phase deposited CNT brushes or carbon walls. We also demonstrate the viscoelastic behavior, caused by the increased influence of the van der Waals’ forces in these highly dense CNT brushes, showing their promise for energy-absorbing coatings.
Bibliographical noteNOTICE: this is the author’s version of a work that was accepted for publication in Carbon. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published Pathak, Siddhartha; Cambaz, Z. Goknur; Kalidindi, Surya R.; Swadener, J. Gregory and Gogotsi, Yury. Viscoelasticity and high buckling stress of dense carbon nanotube brushes. Carbon, 47, 8 (2009). DOI: 10.1016/j.carbon.2009.03.042
- non-catalytic multiwall
- carbon nanotubes
- CNT brushes
- spherical indenters of different radii
- viscoelastic behavior
- van der Waals’ forces