Electronic Level Structure of Silver-Intercalated Cytosine Nanowires

Natalie Fardian-Melamed, Liat Katrivas, Gennady Eidelshtein, Dvir Rotem, Alexander Kotlyar*, Danny Porath*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

12 Scopus citations


Metal-mediated base-paired DNA has long been investigated for basic scientific pursuit and for nanoelectronics purposes. Particularly attractive in these domains is the Ag+-intercalated polycytosine DNA duplex. Extensive studies of this molecule have led to our current understanding of its self-assembly properties, high thermodynamic and structural stability, and high longitudinal conductivity. However, a high-resolution morphological characterization of long Ag+-intercalated polycytosine DNA has hitherto not been carried out. Furthermore, the electronic level structure of this molecule has not been studied before. Here we present a scanning tunneling microscopy and spectroscopy study of this intriguing nanowire. Its temperature-independent morphological and electronic properties suggest substantial stability, while its emergent electronic levels and energy gap provide the basis for its high conductivity.

Original languageAmerican English
Pages (from-to)4505-4511
Number of pages7
JournalNano Letters
Issue number6
StatePublished - 10 Jun 2020

Bibliographical note

Publisher Copyright:
© 2020 American Chemical Society.


  • DNA nanoelectronics
  • STM
  • metallo-base pair
  • scanning tunneling spectroscopy
  • silver ions


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