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Mechanical and electroconductive properties of spatially distributed double stranded DNA arrays on Au (111)

Lookup NU author(s): Dr Eimer TuiteORCiD

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Abstract

Conductive AFM was used to investigate electroconductivity through 10 nm long double stranded DNA molecules in mixed monolayers of thioalkylated-DNA and mercaptohexanol (MCH) on Au (111) surface. The distribution of DNA molecules on the surface was analyzed by tapping mode AFM. Measurements performed in lift mode confirmed that the DNA molecules protrude from the surface rather than lie horizontally adsorbed on the interface. The optimal conductivity measurement time, which is shorter than the mechanical relaxation time of oligonucleotide duplexes, was determined. It was concluded that oligonucleotide duplexes have a resistance of the order of ~ 2 Ω*m at 1 V. © 2007 Elsevier B.V. All rights reserved.

Publication metadata

Author(s): Erts D, Malinovskis U, Muiznieks I, Tuite E

Publication type: Article

Publication status: Published

Journal: Thin Solid Films

Year: 2008

Volume: 516

Issue: 24

Pages: 8969-8974

ISSN (print): 0040-6090

ISSN (electronic):

Publisher: Elsevier SA

URL: http://dx.doi.org/10.1016/j.tsf.2007.11.072

DOI: 10.1016/j.tsf.2007.11.072

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