Department of Physics, Yonsei University, Seoul, 120-749, South Korea.
Department of Physics, Sungkyunkwan University, Suwon, 440-746, South Korea.
Small. 2017 Dec;13(48). doi: 10.1002/smll.201703006. Epub 2017 Nov 6.
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 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 ) 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.
最近，由于脱氧核糖核酸（DNA）具有天然丰富、可生物降解、生物功能性和低成本等固有优势，因此被研究用于电子学领域。然而，由于其固有的绝缘特性，其应用仅限于被动元件。在本报告中，提出了一种具有 Au/DNA/NiO 结的金属-绝缘体-金属隧道二极管。通过 DNA 分子的自对准过程，合成了二维 DNA 纳米片作为隧道势垒，并应用半透明导电氧化物（NiO）作为顶电极，以解决金属穿透问题。该分子器件成功地作为非共振隧道二极管运行，并且变温电流-电压分析证明福勒-诺德海姆隧道是结处的主要传导机制。基于 DNA 的隧道器件似乎是使用生物分子的纳米电子学的有前途的原型。
