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Achieving Ultralow, Zero, and Inverted Tunneling Attenuation Coefficients in Molecular Wires with Extended Conjugation

Authors
Lee, Hyun JuCho, Soo JinKang, HunguHe, XinYoon, Hyo Jae
Issue Date
3월-2021
Publisher
WILEY-V C H VERLAG GMBH
Keywords
highly conjugated molecular wires; inverted attenuation; molecular junctions; ultralow tunneling attenuation; weak length dependence
Citation
SMALL, v.17, no.12
Indexed
SCIE
SCOPUS
Journal Title
SMALL
Volume
17
Number
12
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/128447
DOI
10.1002/smll.202005711
ISSN
1613-6810
Abstract
Molecular tunnel junctions are organic devices miniaturized to the molecular scale. They serve as a versatile toolbox that can systematically examine charge transport behaviors at the atomic level. The electrical conductance of the molecular wire that bridges the two electrodes in a junction is significantly influenced by its chemical structure, and an intrinsically poor conductance is a major barrier for practical applications toward integrating individual molecules into electronic circuitry. Therefore, highly conjugated molecular wires are attractive as active components for the next-generation electronic devices, owing to the narrow highest occupied molecular orbital-lowest occupied molecular orbital gaps provided by their extended pi-building blocks. This article aims to highlight the significance of highly conductive molecular wires in molecular electronics, the structures of which are inspired from conductive organic polymers, and presents a body of discussion on molecular wires exhibiting ultralow, zero, or inverted attenuation of tunneling probability at different lengths, along with future directions.
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