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The effect of boundary conditions on the vibrations of armchair, zigzag, and chiral single-walled carbon nanotubes

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Abstract

Single-walled carbon nanotubes (SWCNTs) have three distinct structures: armchair, zigzag, and chiral. It is known that they have different electronic properties, but the situation regarding their vibrational behavior is less clear. Doubly clamped nanotubes of all three types exhibit the same vibrational modes, and their vibrations in the directions perpendicular to the nanotube axis are degenerate. In nanotube applications, such as sensors based on nano-electro-mechanical systems, their ends are not fully clamped, thus their vibrational behavior could differ. Careful molecular dynamics simulations of SWCNTs with boundary conditions, which imitate the partly clamped experimental conditions, show that armchair, zigzag, and chiral nanotubes indeed vibrate differently. The symmetry between the two perpendicular directions is broken, and SWCNT type does influence the vibrational modes.

Original languageEnglish
Article number124311
JournalJournal of Applied Physics
Volume110
Issue number12
DOIs
StatePublished - 15 Dec 2011

ASJC Scopus subject areas

  • General Physics and Astronomy

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