Negative Friction and Reversible Energy Exchange Between Orderly Motion and Phonons in Carbon Nanotube Oscillator
msra(2004)
摘要
Energy exchanges between orderly intertube axial motion and vibrational modes
are studied for isolated systems of two coaxial carbon nanotubes at
temperatures ranging from 300 K to 500 K. It is found that the excess intertube
van der Waals energy, depleted from the intertube axial motion, is primarily
stored in low-frequency mechanical modes of the oscillator for an extended
period of time, and furthermore, such an energy exchange may be reversible. A
new nanoscale tribological phenomenon of negative friction is reported for the
first time in concentric cylindrical carbon nanotube oscillators.
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关键词
van der waals,quantum hall effect,low frequency,carbon nanotube,materials science,oscillations
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