High Electronic Conductance through Double-Helix DNA Molecules with Fullerene Anchoring Groups

Kathia L. Jiménez-Monroy, Nicolas Renaud, Jeroen Drijkoningen, David Cortens, Koen Schouteden, Christian Van Haesendonck, Wanda J. Guedens, Jean V. Manca, Laurens D.A. Siebbeles, Ferdinand C. Grozema, Patrick H. Wagner

Research output: Contribution to journalArticleScientificpeer-review

12 Citations (Scopus)
25 Downloads (Pure)

Abstract

Determining the mechanism of charge transport through native DNA remains a challenge as different factors such as measuring conditions, molecule conformations, and choice of technique can significantly affect the final results. In this contribution, we have used a new approach to measure current flowing through isolated double-stranded DNA molecules, using fullerene groups to anchor the DNA to a gold substrate. Measurements were performed at room temperature in an inert environment using a conductive AFM technique. It is shown that the π-stacked B-DNA structure is conserved on depositing the DNA. As a result, currents in the nanoampere range were obtained for voltages ranging between ±1 V. These experimental results are supported by a theoretical model that suggests that a multistep hopping mechanism between delocalized domains is responsible for the long-range current flow through this specific type of DNA.

Original languageEnglish
Pages (from-to)1182-1188
Number of pages7
JournalThe Journal of Physical Chemistry Part A: Molecules, Spectroscopy, Kinetics, Environment and General Theory
Volume121
Issue number6
DOIs
Publication statusPublished - 16 Feb 2017

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