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Distinct armchair and zigzag charge transport through single polycyclic aromatics

In aromatic systems with large π-conjugated structures, armchair and zigzag configurations can affect each material’s electronic properties, determining their performance and generating certain quantum effects. Here, we explore the intrinsic effect of armchair and zigzag pathways on charge transport...

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Autores principales: Zhang, Miao, Wu, Zewen, Jia, Hongxing, Li, Peihui, Yang, Lei, Hao, Jie, Wang, Jinying, Zhang, Enyu, Meng, Linan, Yan, Zhuang, Liu, Yi, Du, Pingwu, Kong, Xianghua, Xiao, Shengxiong, Jia, Chuancheng, Guo, Xuefeng
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Association for the Advancement of Science 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10413665/
https://www.ncbi.nlm.nih.gov/pubmed/37256956
http://dx.doi.org/10.1126/sciadv.adg4346
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author Zhang, Miao
Wu, Zewen
Jia, Hongxing
Li, Peihui
Yang, Lei
Hao, Jie
Wang, Jinying
Zhang, Enyu
Meng, Linan
Yan, Zhuang
Liu, Yi
Du, Pingwu
Kong, Xianghua
Xiao, Shengxiong
Jia, Chuancheng
Guo, Xuefeng
author_facet Zhang, Miao
Wu, Zewen
Jia, Hongxing
Li, Peihui
Yang, Lei
Hao, Jie
Wang, Jinying
Zhang, Enyu
Meng, Linan
Yan, Zhuang
Liu, Yi
Du, Pingwu
Kong, Xianghua
Xiao, Shengxiong
Jia, Chuancheng
Guo, Xuefeng
author_sort Zhang, Miao
collection PubMed
description In aromatic systems with large π-conjugated structures, armchair and zigzag configurations can affect each material’s electronic properties, determining their performance and generating certain quantum effects. Here, we explore the intrinsic effect of armchair and zigzag pathways on charge transport through single hexabenzocoronene molecules. Theoretical calculations and systematic experimental results from static carbon-based single-molecule junctions and dynamic scanning tunneling microscope break junctions show that charge carriers are preferentially transported along the hexabenzocoronene armchair pathway, and thus, the corresponding current through this pathway is approximately one order of magnitude higher than that through the zigzag pathway. In addition, the molecule with the zigzag pathway has a smaller energy gap. In combination with its lower off-state conductance, it shows a better field-effect performance because of its higher on-off ratio in electrical measurements. This study on charge transport pathways offers a useful perspective for understanding the electronic properties of π-conjugated systems and realizing high-performance molecular nanocircuits toward practical applications.
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spelling pubmed-104136652023-08-11 Distinct armchair and zigzag charge transport through single polycyclic aromatics Zhang, Miao Wu, Zewen Jia, Hongxing Li, Peihui Yang, Lei Hao, Jie Wang, Jinying Zhang, Enyu Meng, Linan Yan, Zhuang Liu, Yi Du, Pingwu Kong, Xianghua Xiao, Shengxiong Jia, Chuancheng Guo, Xuefeng Sci Adv Physical and Materials Sciences In aromatic systems with large π-conjugated structures, armchair and zigzag configurations can affect each material’s electronic properties, determining their performance and generating certain quantum effects. Here, we explore the intrinsic effect of armchair and zigzag pathways on charge transport through single hexabenzocoronene molecules. Theoretical calculations and systematic experimental results from static carbon-based single-molecule junctions and dynamic scanning tunneling microscope break junctions show that charge carriers are preferentially transported along the hexabenzocoronene armchair pathway, and thus, the corresponding current through this pathway is approximately one order of magnitude higher than that through the zigzag pathway. In addition, the molecule with the zigzag pathway has a smaller energy gap. In combination with its lower off-state conductance, it shows a better field-effect performance because of its higher on-off ratio in electrical measurements. This study on charge transport pathways offers a useful perspective for understanding the electronic properties of π-conjugated systems and realizing high-performance molecular nanocircuits toward practical applications. American Association for the Advancement of Science 2023-05-31 /pmc/articles/PMC10413665/ /pubmed/37256956 http://dx.doi.org/10.1126/sciadv.adg4346 Text en Copyright © 2023 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). https://creativecommons.org/licenses/by-nc/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license (https://creativecommons.org/licenses/by-nc/4.0/) , which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited.
spellingShingle Physical and Materials Sciences
Zhang, Miao
Wu, Zewen
Jia, Hongxing
Li, Peihui
Yang, Lei
Hao, Jie
Wang, Jinying
Zhang, Enyu
Meng, Linan
Yan, Zhuang
Liu, Yi
Du, Pingwu
Kong, Xianghua
Xiao, Shengxiong
Jia, Chuancheng
Guo, Xuefeng
Distinct armchair and zigzag charge transport through single polycyclic aromatics
title Distinct armchair and zigzag charge transport through single polycyclic aromatics
title_full Distinct armchair and zigzag charge transport through single polycyclic aromatics
title_fullStr Distinct armchair and zigzag charge transport through single polycyclic aromatics
title_full_unstemmed Distinct armchair and zigzag charge transport through single polycyclic aromatics
title_short Distinct armchair and zigzag charge transport through single polycyclic aromatics
title_sort distinct armchair and zigzag charge transport through single polycyclic aromatics
topic Physical and Materials Sciences
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10413665/
https://www.ncbi.nlm.nih.gov/pubmed/37256956
http://dx.doi.org/10.1126/sciadv.adg4346
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