Frictionless sliding of single-stranded DNA in a carbon nanotube pore observed by single molecule force spectroscopy

Valentin Lulevich, Sangil Kim, Costas P. Grigoropoulos, Aleksandr Noy

Research output: Contribution to journalArticle

40 Scopus citations

Abstract

Smooth inner pores of carbon nanotubes (CNT) provide a fascinating model for studying biological transport. We used an atomic force microscope to pull a single-stranded DNA oligomer from a carbon nanotube pore. DNA extraction from CNT pores occurs at a nearly constant force, which is drastically different from the elastic profile commonly observed during polymer stretching with atomic force microscopy. We show that a combination of the frictionless nanotube pore walls and an unfavorable DNA solvation energy produces this constant force profiles.

Original languageEnglish (US)
Pages (from-to)1171-1176
Number of pages6
JournalNano Letters
Volume11
Issue number3
DOIs
StatePublished - Mar 9 2011
Externally publishedYes

Keywords

  • carbon nanotubes
  • CNT membrane
  • DNA
  • molecular friction
  • nanofluidics
  • Single molecule force spectroscopy

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Mechanical Engineering

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