Charge Transport in 2D DNA Tunnel Junction Diodes

Minho Yoon, Sung Wook Min, Sreekantha Reddy Dugasani, Yong Uk Lee, Min Suk Oh, Thomas D. Anthopoulos, Sung Ha Park, Seongil Im*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

14 Scopus citations


Recently, deoxyribonucleic acid (DNA) is studied for electronics due to its intrinsic benefits such as its natural plenitude, biodegradability, biofunctionality, and low-cost. However, its applications are limited to passive components because of inherent insulating properties. In this report, a metal–insulator–metal tunnel diode with Au/DNA/NiOx junctions is presented. Through the self-aligning process of DNA molecules, a 2D DNA nanosheet is synthesized and used as a tunneling barrier, and semitransparent conducting oxide (NiOx) is applied as a top electrode for resolving metal penetration issues. This molecular device successfully operates as a nonresonant tunneling diode, and temperature-variable current–voltage analysis proves that Fowler–Nordheim tunneling is a dominant conduction mechanism at the junctions. DNA-based tunneling devices appear to be promising prototypes for nanoelectronics using biomolecules.

Original languageEnglish (US)
Article number1703006
Issue number48
StatePublished - Dec 27 2017


  • 2D DNA crystals
  • charge-transport mechanisms
  • nanosheets
  • semitransparent conducting oxide
  • tunnel junction diodes

ASJC Scopus subject areas

  • General Chemistry
  • Engineering (miscellaneous)
  • Biotechnology
  • General Materials Science
  • Biomaterials


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