Abstract The understanding of the influence of electrode characteristics on charge transport is essential in the field of molecular electronics. In this work, we investigate the electronic transport properties of molecular junctions comprising methylthiol-terminated permethyloligosilanes and face-centered crystal Au/Ag electrodes with crystallographic orientations of (111) and (100), based on the ab initio quantum transport simulations. The calculations reveal that the molecular junction conductance is dominated by the electronic coupling between two interfacial metal-S bonding states, which can be tuned by varying the molecular length, metal material of the electrodes, and crystallographic orientation. As the permethyloligosilane backbone elongates, although the σ conjugation increases, the decreasing of coupling induced by the increasing number of central Si atoms reduces the junction conductance. The molecular junction conductance of methylthiol-terminated permethyloligosilanes with Au electrodes is higher than that with Ag electrodes with a crystallographic orientation of (111). However, the conductance trend is reversed when the electrode crystallographic orientation varies from (111) to (100), which can be ascribed to the reversal of interfacial coupling between two metal-S interfacial states. These findings are conducive to elucidating the mechanism of molecular junctions and improving the transport properties of molecular devices by adjusting the electrode characteristics.
(Molecule transport characteristics; molecular dynamics; electronic structure of polymers)
Fund: Project supported by the Shandong Provincial Natural Science Foundation, China (Grant No. ZR2019PA022) and the National Natural Science Foundation of China (Grant No. 21933002).
Corresponding Authors:
Ming-Lang Wang, Chuan-Kui Wang
E-mail: wangminglang@sdnu.edu.cn;ckwang@sdnu.edu.cn
Cite this article:
Ming-Lang Wang(王明郎), Bo-Han Zhang(张博涵), Wen-Fei Zhang(张雯斐), Xin-Yue Tian(田馨月), Guang-Ping Zhang(张广平), and Chuan-Kui Wang(王传奎) Effect of crystallographic orientations on transport properties of methylthiol-terminated permethyloligosilane molecular junction 2022 Chin. Phys. B 31 077303
[1] Xiang D, Wang X, Jia C, Lee T and Guo X 2016 Chem. Rev.116 4318 [2] Evers F, Korytár R, Tewari S and van Ruitenbeek J M 2020 Rev. Mod. Phys.92 035001 [3] Aviram A and Ratner M A 1974 Chem. Phys. Lett.29 277 [4] Baldea I 2021 Phys. Rev. B103 195408 [5] Song X, Yu X and Hu W 2020 J. Phys. Chem. C124 24408 [6] Wei M, Fu X, Wang Z, Hu G, Li Z, Wang C and Zhang G 2019 J. Mater. Chem. C7 9000 [7] Lee H J, Cho S J, Kang H, He X and Yoon H J 2021 Small17 2005711 [8] Zang Y, Fu T, Zou Q, Ng F, Li H, Steigerwald M L, Nuckolls C and Venkataraman L 2020 Nano Lett.20 8415 [9] O'Driscoll L J and Bryce M R 2021 Nanoscale13 1103 [10] Meng L, Xin N, Wang J, Xu J, Ren S, Yan Z, Zhang M, Shen C, Zhang G and Guo X 2021 Angew. Chem. Int. Ed.60 12274 [11] Wang M, Zhang G, Fu X and Wang C 2020 Chin. J. Chem. Phys.33 697 [12] Jia C, Migliore A, Xin N, Huang S, Wang J, Yang Q, Wang S, Chen H, Wang D and Feng B 2016 Science352 1443 [13] Xu Y, Wang M, Fang C, Cui B, Ji G, Zhao W, Liu D, Wang C and Qin M 2019 J. Phys.:Condens. Matter31 285302 [14] Sun H, Liu X, Su Y, Deng B, Peng H, Decurtins S, Sanvito S, Liu S, Hou S and Liao J 2019 Nanoscale11 13117 [15] Li P, Jia C and Guo X 2021 Chem. Rec.21 1284 [16] Jia C and Guo X 2013 Chem. Soc. Rev.42 5642 [17] Kaliginedi V, Rudnev A V, Moreno-García P, Baghernejad M, Huang C, Hong W and Wandlowski T 2014 Phys. Chem. Chem. Phys.16 23529 [18] Su T A, Neupane M, Steigerwald M L, Venkataraman L and Nuckolls C 2016 Nat. Rev. Mater.1 16002 [19] Liu W, Cheng J, Yan C, Li H, Wang Y and Liu D 2011 Chin. Phys. B20 107302 [20] Dai X, Zhou Y, Li J, Zhang L, Zhao Z and Li H 2017 Chin. Phys. B26 087310 [21] Cai C and Chen J 2018 Chin. Phys. B27 067304 [22] Zeng J, Chen K and Zhou Y 2020 Chin. Phys. B29 088503 [23] Peng C, Zhou Y, Zhang S and Zhao Z 2021 Chin. Phys. B30 017101 [24] Bejarano F, Olavarria-Contreras I J, Droghetti A, Rungger I, Rudnev A and Gutiérrez D, Mas-Torrent M, Veciana J, Van Der Zant H S and Rovira C 2018 J. Am. Chem. Soc.140 1691 [25] Zang Y, Pinkard A, Liu Z, Neaton J B, Steigerwald M L, Roy X and Venkataraman L 2017 J. Am. Chem. Soc.139 14845 [26] Bruot C, Xiang L, Palma J L and Tao N 2015 ACS Nano9 88 [27] Mohr M, Jasper-Toennies T, Weismann A, Frederiksen T, Garcia-Lekue A, Ulrich S, Herges R and Berndt R 2019 Phys. Rev. B99 245417 [28] Li S, Jiang Y, Wang Y, Sanvito S and Hou S 2021 J. Phys. Chem. Lett.12 7596 [29] Wang M, Wang H, Zhang G, Wang Y, Sanvito S and Hou S 2018 J. Chem. Phys.148 184703 [30] Chen F, Li X, Hihath J, Huang Z and Tao N 2006 J. Am. Chem. Soc.128 15874 [31] Lawson J W and Bauschlicher C W Jr 2006 Phys. Rev. B74 125401 [32] Wang M and Wang C 2020 Chin. Phys. B29 113101 [33] Kim Y, Song H, Strigl F, Pernau H, Lee T and Scheer E 2011 Phys. Rev. Lett.106 196804 [34] Kim T, Vázquez H, Hybertsen M S and Venkataraman L 2013 Nano. Lett.13 3358 [35] Sen A and Kaun C 2010 ACS Nano4 6404 [36] Sen A, Lin C and Kaun C 2013 J. Phys. Chem. C117 13676 [37] Zhao W, Yang C, Wang M and Ma X 2013 Solid State Commun.153 1 [38] Tu X, Wang M, Sanvito S and Hou S 2014 J. Chem. Phys.141 194702 [39] Kaur R P, Sawhney R S and Engles D 2016 Mol. Phys.114 2289 [40] Kaur R, Narang S B and Randhawa D K K 2018 J. Mol. Model.24 1 [41] Roy T R and Sen A 2021 Adv. Theory Simul.4 2100054 [42] Fan Z, Xie F, Jiang X, Wei Z and Li S 2016 Carbon110 200 [43] Fan Z, Zhang Z, Deng X, Tang G, Yang C, Sun L and Zhu H 2016 Carbon98 179 [44] Wu D, Cao X, Jia P, Zeng Y, Feng Y, Tang L, Zhou W and Chen K 2020 Sci. China-Phys. Mech. Astron.63 276811 [45] Liu Q, Li J, Wu D, Deng X, Zhang Z, Fan Z and Chen K 2021 Phys. Rev. B104 045412 [46] West R and Carberry E 1975 Science189 179 [47] Tsuji H, Terada M, Toshimitsu A and Tamao K 2003 J. Am. Chem. Soc.125 7486 [48] Bande A and Michl J 2009 Chem. Eur. J.15 8504 [49] Klausen R S, Widawsky J R, Steigerwald M L, Venkataraman L and Nuckolls C 2012 J. Am. Chem. Soc.134 4541 [50] Su T A, Li H, Klausen R S, Widawsky J R, Batra A, Steigerwald M L, Venkataraman L and Nuckolls C 2016 J. Am. Chem. Soc.138 7791 [51] Li H, Kim N T, Su T A, Steigerwald M L, Nuckolls C, Darancet P, Leighton J L and Venkataraman L 2016 J. Am. Chem. Soc.138 16159 [52] Rodrigues V, Fuhrer T and Ugarte D 2000 Phys. Rev. Lett.85 4124 [53] Li H, Garner M H, Su T A, Jensen A, Inkpen M S, Steigerwald M L, Venkataraman L, Solomon G C and Nuckolls C 2017 J. Am. Chem. Soc.139 10212 [54] Jovanovic M and Michl J 2018 J. Am. Chem. Soc.140 11158 [55] Su T A, Li H, Steigerwald M L, Venkataraman L and Nuckolls C 2015 Nat. Chem.7 215 [56] Li H, Su T A, Camarasa-Gómez M, Hernangómez-Pérez D, Henn S E, Pokorny V, Caniglia C D, Inkpen M S, Korytár R and Steigerwald M L 2017 Angew. Chem. Int. Ed.129 14333 [57] Atomistix toolKit version 2018.06, synopsys quantumwise A/S (www.quantumwise.com) [58] Smidstrup S, Markussen T, Vancraeyveld P, Wellendorff J, Schneider J, Gunst T, Verstichel B, Stradi D, Khomyakov P A and Vej-Hansen U G 2019 J. Phys.:Condens. Matter32 015901 [59] Troullier N and Martins J L 1991 Phys. Rev. B43 1993 [60] Soler J M, Artacho E, Gale J D, García A, Junquera J, Ordejón P and Sánchez-Portal D 2002 J. Phys.:Condens Matter14 2745 [61] García-Gil S, García A, Lorente N and Ordejón P 2009 Phys. Rev. B79 075441 [62] Perdew J P, Burke K, Ernzerhof M 1996 Phys. Rev. Lett.77 3865 [63] Brandbyge M, Mozos J, Ordejón P, Taylor J and Stokbro, K 2002 Phys. Rev. B65 165401 [64] Datta S 1995 Electronic Transport in Mesoscopic Systems (Cambridge:Cambridge University Press), p. 92 [65] Xiang A, Wang M, Wang H, Sun H, Hou S and Liao J 2016 Chem. Phys.465-466 40
Altmetric calculates a score based on the online attention an article receives. Each coloured thread in the circle represents a different type of online attention. The number in the centre is the Altmetric score. Social media and mainstream news media are the main sources that calculate the score. Reference managers such as Mendeley are also tracked but do not contribute to the score. Older articles often score higher because they have had more time to get noticed. To account for this, Altmetric has included the context data for other articles of a similar age.