Dissimilar kinetic behavior of electrically manipulated single- and double-stranded DNA tethered to a gold surface

Ulrich Rant, Kenji Arinaga, Marc Tornow, Woon Kim Yong, Roland R. Netz, Shozo Fujita, Naoki Yokoyama, Gerhard Abstreiter

Research output: Contribution to journalArticlepeer-review

61 Scopus citations

Abstract

We report on the electrical manipulation of single- and double-stranded oligodeoxynucleotides that are end tethered to gold surfaces in electrolyte solution. The response to alternating repulsive and attractive electric surface fields is studied by time-resolved fluorescence measurements, revealing markedly distinct dynamics for the flexible single-stranded and stiff double-stranded DNA, respectively. Hydrodynamic simulations rationalize this finding and disclose two different kinetic mechanisms: stiff polymers undergo rotation around the anchoring pivot point; flexible polymers, on the other hand, are pulled onto the attracting surface segment by segment.

Original languageEnglish
Pages (from-to)3666-3671
Number of pages6
JournalBiophysical Journal
Volume90
Issue number10
DOIs
StatePublished - May 2006

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