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Micromachines 2018, 9(2), 67; https://doi.org/10.3390/mi9020067

Investigation on Single-Molecule Junctions Based on Current–Voltage Characteristics

Department of Chemistry, Graduate School of Science, Tokyo Institute of Technology, 2-12-1 W4-10 Ookayama, Meguro-ku, Tokyo 152-8551, Japan
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Received: 15 January 2018 / Revised: 30 January 2018 / Accepted: 31 January 2018 / Published: 2 February 2018
(This article belongs to the Special Issue Atomic and Molecular Junction for Molecular Electronic Devices)
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Abstract

The relationship between the current through an electronic device and the voltage across its terminals is a current–voltage characteristic (IV) that determine basic device performance. Currently, IV measurement on a single-molecule scale can be performed using break junction technique, where a single molecule junction can be prepared by trapping a single molecule into a nanogap between metal electrodes. The single-molecule IVs provide not only the device performance, but also reflect information on energy dispersion of the electronic state and the electron-molecular vibration coupling in the junction. This mini review focuses on recent representative studies on IVs of the single molecule junctions that cover investigation on the single-molecule diode property, the molecular vibration, and the electronic structure as a form of transmission probability, and electronic density of states, including the spin state of the single-molecule junctions. In addition, thermoelectronic measurements based on IVs and identification of the charged carriers (i.e., electrons or holes) are presented. The analysis in the single-molecule IVs provides fundamental and essential information for a better understanding of the single-molecule science, and puts the single molecule junction to more practical use in molecular devices. View Full-Text
Keywords: single-molecule junction; current–voltage characteristics; atomic and electronic structure; vibrational mode; spin state single-molecule junction; current–voltage characteristics; atomic and electronic structure; vibrational mode; spin state
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Isshiki, Y.; Matsuzawa, Y.; Fujii, S.; Kiguchi, M. Investigation on Single-Molecule Junctions Based on Current–Voltage Characteristics. Micromachines 2018, 9, 67.

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