Effects of monolayer Bi on the self-assembly of DBBA on Au(111)
Tian, G; Shen, YX; He, BC; Yu, ZQ; Song, F; Lu, YH; Wang, PS; Gao, YL; Huang, H
2017
发表期刊SURFACE SCIENCE
ISSN0039-6028
卷号665期号:-页码:89-95
文章类型期刊论文
摘要The initial growth behaviors of nonplanar 10,10'-dibromo-9,9'-bianthryl (DBBA) molecules on the Au(111) substrates, which is either pristine or Bi-3 x root 3-Au(111), at low deposition rates have been systematically investigated using low temperature scanning tunneling microscopy (LT-STM) and density functional theories (DFT) calculations. The effects of such substrates on the subsequent graphene nanoribbons (GNRs) formation are addressed. On clean Au(111), DBBA molecules self-assemble into highly ordered commensurate single-molecule chains along <11<(2)over bar>>(Au) at a coverage of 0.8 monolayer (ML), and collectively transit into long-range ordered commensurate double-molecule chains along <1<(1)over bar>0>(Au) but with many single-molecule vacancies at a coverage of 1.2 ML, revealing the delicate competing between intermolecular interactions and molecule-substrate interfacial interactions. The interfacial interactions are further tuned by introducing bismuth to form a Bi-3 x root 3-Au(111)surface, where DBBA molecules self-assemble into an unique hexamer phase due to the enhanced intermolecular interactions via C-H center dot center dot center dot pi and halogen bonds. DFT calculations confirm the proposed molecular configuration change of single DBBA molecule when adsorbed on different substrates. The calculated difference in C-Br bond gives further insight into why no GNRs formed on Bi-3 x root 3-Au(111). (C) 2017 Elsevier B.V. All rights reserved.
关键词Atomic-force Microscopy Bottom-up Fabrication Graphene Nanoribbons Photovoltaic Cell Surface Films Spectroscopy Interfaces 10 Deposition 10'-dibromo-9 9'-bianthryl
DOI10.1016/j.susc.2017.08.008
关键词[WOS]ATOMIC-FORCE MICROSCOPY ; BOTTOM-UP FABRICATION ; GRAPHENE NANORIBBONS ; PHOTOVOLTAIC CELL ; SURFACE ; FILMS ; SPECTROSCOPY ; 10,10'-DIBROMO-9,9'-BIANTHRYL ; INTERFACES ; DEPOSITION
收录类别SCI
语种英语
WOS记录号WOS:000412958700012
引用统计
文献类型期刊论文
条目标识符http://ir.sinap.ac.cn/handle/331007/28634
专题中科院上海应用物理研究所2011-2018年
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Tian, G,Shen, YX,He, BC,et al. Effects of monolayer Bi on the self-assembly of DBBA on Au(111)[J]. SURFACE SCIENCE,2017,665(-):89-95.
APA Tian, G.,Shen, YX.,He, BC.,Yu, ZQ.,Song, F.,...&Huang, H.(2017).Effects of monolayer Bi on the self-assembly of DBBA on Au(111).SURFACE SCIENCE,665(-),89-95.
MLA Tian, G,et al."Effects of monolayer Bi on the self-assembly of DBBA on Au(111)".SURFACE SCIENCE 665.-(2017):89-95.
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