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Thermal oscillations of structurally distinct single-walled carbon nanotubes Polina Pine

Summary: Thermal oscillations of structurally distinct single-walled carbon nanotubes
Polina Pine
Russel Berrie Nanotechnology Institute, Technion, Haifa, Israel, 32000
Yuval E. Yaish
Department of Electrical Engineering, Technion, Haifa, Israel, 32000
Joan Adler
Department of Physics, Technion, Haifa, Israel, 32000
( Dated: November 17, 2011)
Zigzag, armchair and different types of chiral single walled carbon nanotubes (SWCNTs) have
distinct structures, due to different wrapping vectors of the underlying graphene sheets. The elec-
tronic properties depend on their structure, but this is less clear w.r.t. their mechanical properties.
We modeled the first four flexural thermal vibrational modes of all three types with clamped ends,
as a function of length. We applied a carefully equilibrated molecular dynamics procedure that
was previously validated by comparison with the Timoshenko beam model in suitable limits. This
analytic model allows for both rotary inertia and shearing deformation, but it cannot differenti-
ate between the three atomistic structures. Comparison between the vibrational behavior of the
three types of nanotubes clearly shows that the SWCNT structure does not affect the vibrational
frequencies under clamped conditions.
Carbon nanotubes (CNTs) posses unique electrical and
mechanical properties and are of great interest for both


Source: Adler, Joan - Physics Department, Technion, Israel Institute of Technology


Collections: Physics