Author/Authors :
Benedict، نويسنده , , Lorin X and Chopra، نويسنده , , Nasreen G and Cohen، نويسنده , , Marvin L and Zettl، نويسنده , , A and Louie، نويسنده , , Steven G and Crespi، نويسنده , , Vincent H، نويسنده ,
Abstract :
High-tensile-strength carbon nanotubes are nonetheless susceptible to large radial deformations. In particular, tubes may collapse so that opposing tube walls attain the graphitic interlayer spacing. A simple elastic model shows that the ratio of mean curvature modulus to the interwall attraction of graphite determines the cross-section of a collapsed tube. Transmission electron microscopy of collapsed tubes confirms the elastic model and affords the first microscopic measurement of the strength of the intersheet attraction, a quantity otherwise difficult to assess.
