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Charge Transport in 2D DNA Tunnel Junction Diodes
Author(s) -
Yoon Minho,
Min SungWook,
Dugasani Sreekantha Reddy,
Lee Yong Uk,
Oh Min Suk,
Anthopoulos Thomas D.,
Park Sung Ha,
Im Seongil
Publication year - 2017
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201703006
Subject(s) - quantum tunnelling , nanoelectronics , materials science , diode , nanosheet , nanotechnology , non blocking i/o , tunnel diode , optoelectronics , oxide , biomolecule , electrode , molecular electronics , molecule , chemistry , biochemistry , metallurgy , catalysis , organic chemistry
Abstract 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/NiO x 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 (NiO x ) 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.