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 language | English (US) |
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Pages (from-to) | 1171-1176 |
Number of pages | 6 |
Journal | Nano Letters |
Volume | 11 |
Issue number | 3 |
DOIs | |
State | Published - Mar 9 2011 |
Externally published | Yes |
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