Mechanical behavior of a carbon nanotube turf

作者：Mesarovic S Dj^*; McCarter C M; Bahr D F; Radhakrishnan H; Richards R F; Richards C D; McClain D; Jiao J

来源：Scripta Materialia, 2007, 56(2): 157-160.

DOI：10.1016/j.scriptamat.2006.09.021

• carbon nanotubes
• nanoindentation
• elastic behavior
• adhesive contact
• micromechanical modeling

Carbon nanotubes grown on a substrate form a turf - a complex structure of intertwined nanotubes cross-linked by adhesive contact. We analyze the physical mechanism of deformation on the basis of. (i) standard and continuous stiffness nanoindentation; and (ii) micromechanical scaling analysis. At moderate strains, deformation is fully reversible, comprising small viscoelastic relaxation caused by the thermally activated sliding of contacts. The pre-existing strain energy of bent nanotubes produces a high initial tangent modulus, followed by an order of magnitude decrease in the tangent modulus.

• 出版日期2007-1