Scaling in force spectroscopy of macromolecules

Cristiano L. Dias, Martin Dubé, Fernando A. Oliveira, Martin Grant

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

We use molecular dynamics to determine the force needed to rupture a chain molecule being stretched at constant loading rate and temperature. When all energy bonds of the molecule are identical, we find that the force F depends on the pulling rate r and temperature T according to F∼const-T13ln(rT)13. When a single weak bond is introduced, this result is modified to F∼const-T23ln(rT)23. This scaling, which is model independent, can be used with experiment to quantitatively extract relevant microscopic parameters.

Original languageEnglish (US)
Article number011918
JournalPhysical Review E - Statistical, Nonlinear, and Soft Matter Physics
Volume72
Issue number1
DOIs
StatePublished - Jul 2005
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Statistical and Nonlinear Physics
  • Statistics and Probability
  • Condensed Matter Physics

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