Physics – Condensed Matter – Materials Science
Scientific paper
2007-08-28
Physics
Condensed Matter
Materials Science
4 pages, 3 figures
Scientific paper
10.1103/PhysRevLett.100.086807
Helical or coiled nanostructures have been object of intense experimental and theoretical studies due to their special electronic and mechanical properties. Recently, it was experimentally reported that the dynamical response of foamlike forest of coiled carbon nanotubes under mechanical impact exhibits a nonlinear, non-Hertzian behavior, with no trace of plastic deformation. The physical origin of this unusual behavior is not yet fully understood. In this work, based on analytical models, we show that the entanglement among neighboring coils in the superior part of the forest surface must be taken into account for a full description of the strongly nonlinear behavior of the impact response of a drop-ball onto a forest of coiled carbon nanotubes.
Coluci Vitor R.
Daraio Chiara
Fonseca Alexandre F.
Galvao Douglas S.
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