Scanning tunneling spectroscopy of single DNA molecules

Dmitry A. Ryndyk; Errez Shapir; Danny Porath; Arrigo Calzolari; Rosa Di Felice; Gianaurelio Cuniberti

doi:10.1021/nn800238g

Scanning tunneling spectroscopy of single DNA molecules

Dmitry A. Ryndyk, Errez Shapir, Danny Porath^*, Arrigo Calzolari, Rosa Di Felice, Gianaurelio Cuniberti

^*Corresponding author for this work

Institute of Chemistry

Research output: Contribution to journal › Article › peer-review

25 Scopus citations

Abstract

We briefly present the results of recent experiments of transverse scanning tunneling spectroscopy of homogeneous poly(dG)-poly(dC) DNA molecules and discuss them in the light of theoretical investigation. A semiempirical theoretical model is adopted to describe the transverse tunneling current across a DNA molecule placed between a metallic gold substrate and a metallic STM tip. We show that the main trends in the positions and relative magnitudes of the conductance peaks can be explained by a minimal model of a double tunnel junction with the molecule-electrode couplings and the applied voltage explicitly taken into account.

Original language	English
Pages (from-to)	1651-1656
Number of pages	6
Journal	ACS Nano
Volume	3
Issue number	7
DOIs	https://doi.org/10.1021/nn800238g
State	Published - 28 Jul 2009

Keywords

DNA
Molecular nanoelectronics
Scanning probe microscopy
Theoretical modeling

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10.1021/nn800238g

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abstract = "We briefly present the results of recent experiments of transverse scanning tunneling spectroscopy of homogeneous poly(dG)-poly(dC) DNA molecules and discuss them in the light of theoretical investigation. A semiempirical theoretical model is adopted to describe the transverse tunneling current across a DNA molecule placed between a metallic gold substrate and a metallic STM tip. We show that the main trends in the positions and relative magnitudes of the conductance peaks can be explained by a minimal model of a double tunnel junction with the molecule-electrode couplings and the applied voltage explicitly taken into account.",

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AU - Ryndyk, Dmitry A.

AU - Shapir, Errez

AU - Porath, Danny

AU - Calzolari, Arrigo

AU - Felice, Rosa Di

AU - Cuniberti, Gianaurelio

PY - 2009/7/28

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N2 - We briefly present the results of recent experiments of transverse scanning tunneling spectroscopy of homogeneous poly(dG)-poly(dC) DNA molecules and discuss them in the light of theoretical investigation. A semiempirical theoretical model is adopted to describe the transverse tunneling current across a DNA molecule placed between a metallic gold substrate and a metallic STM tip. We show that the main trends in the positions and relative magnitudes of the conductance peaks can be explained by a minimal model of a double tunnel junction with the molecule-electrode couplings and the applied voltage explicitly taken into account.

AB - We briefly present the results of recent experiments of transverse scanning tunneling spectroscopy of homogeneous poly(dG)-poly(dC) DNA molecules and discuss them in the light of theoretical investigation. A semiempirical theoretical model is adopted to describe the transverse tunneling current across a DNA molecule placed between a metallic gold substrate and a metallic STM tip. We show that the main trends in the positions and relative magnitudes of the conductance peaks can be explained by a minimal model of a double tunnel junction with the molecule-electrode couplings and the applied voltage explicitly taken into account.

KW - DNA

KW - Molecular nanoelectronics

KW - Scanning probe microscopy

KW - Theoretical modeling

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Scanning tunneling spectroscopy of single DNA molecules

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