Inferring physical parameters from images of vibrating carbon nanotubes

M. M.J. Treacy, A. Krishnan, P. N. Yianilos

Research output: Contribution to journalArticle

17 Scopus citations

Abstract

We describe a hidden parameter inferencing algorithm for deducing the length, width, and vibration profile from images of thermally excited single-wall carbon nanotubes. With accurate estimates of these parameters, the Young's modulus can be deduced. The algorithm is sensitive to shot noise in the image, primarily because of the low nanotube image contrast. Noise causes the nanotube length and width to be overestimated, and the vibration amplitude to be underestimated. After correcting for shot noise, we infer an average value of the Young's modulus of 〈Y〉 = 1.20 ± 0.20 TPa, which is larger than the currently accepted value for graphite.

Original languageEnglish (US)
Pages (from-to)317-323
Number of pages7
JournalMicroscopy and Microanalysis
Volume6
Issue number4
DOIs
StatePublished - Jan 1 2000
Externally publishedYes

Keywords

  • Hidden parameter inferencing
  • Nanotubes
  • Young's modulus

ASJC Scopus subject areas

  • Instrumentation

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