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Simulation of vibrational frequencies of carbon nanotubes Polina Pine1, Yuval Yaish,2 Joan Adler3
 

Summary: Simulation of vibrational frequencies of carbon nanotubes
Polina Pine1, Yuval Yaish,2 Joan Adler3
1 Russell Berrie Nanotechnology Institute, Technion
2 Department of Electrical Engineering, Technion
3 Department of Physics, Technion

' , ,
pine@tx.technion.ac.il
Carbon nanotubes (CNT) are long thin tubes made from rolled up single sheets of graphite. They
are truly nanometer size in diameter and can be grown in lengths ranging from a few nanometers to
hundreds of microns. Carbon nanotubes have enormous potential for a variety of applications, many
still to be explored. Experiments have been conducted in areas such as the electrical actuation and
detection of the guitar-string-like oscillation modes of doubly clamped nanotube oscillators which can
be used as ultrasensitive mass, pressure and force detectors [1]. For a typical CNT of 100nm length and
1nm in diameter the total mass is four orders of magnitude smaller than conventional NEMS
(NanoElectroMechanical Systems). Hence, assuming all other properties being equal, CNT resonators
are expected to reach the ultimate mass sensitivity required for detecting small molecules. However,
there are questions whether a single Young's Modulus is a valid concept along on entire nanotube [2,3].
If so, accepted analytical models may not be valid and thus a deeper understanding of these oscillations
is needed.

  

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

 

Collections: Physics