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

Research output: Contribution to journalArticlepeer-review

10 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)
Pages (from-to)1703006
Issue number48
StatePublished - Nov 6 2017


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