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, 86 (16), 3670-3

Metallic Conduction Through Engineered DNA: DNA Nanoelectronic Building Blocks

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Metallic Conduction Through Engineered DNA: DNA Nanoelectronic Building Blocks

A Rakitin et al. Phys Rev Lett.

Abstract

A novel way of engineering DNA molecules involves substituting the imino proton of each base pair with a metal ion to obtain M-DNA with altered electronic properties. We report the first direct evidence of metalliclike conduction through 15 microm long M-DNA. In contrast, measurements on B-DNA give evidence of semiconducting behavior with a few hundred meV band gap at room temperature. The drastic change of M-DNA conductivity points to a new degree of freedom in the development of future molecular electronics utilizing DNA, such as creating all-DNA junction devices for use as nanoelectronic building blocks.

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