STM Imaging ortho- and para-Fluorothiophenol Self-Assembled Monolayers on Au(111)
文献类型：期刊论文
| 作者 | Jiang, P ; Deng, K ; Fichou, D ; Xie, SS ; Nion, A ; Wang, C |
| 刊名 | LANGMUIR
 |
| 出版日期 | 2009 |
| 卷号 | 25期号:9页码:5012 |
| 关键词 | SCANNING-TUNNELING-MICROSCOPY GENERALIZED GRADIENT APPROXIMATION AROMATIC THIOLS SURFACE MOLECULES POLYMORPHISM SUBSTRATE CU(111) DOMAINS |
| ISSN号 | 0743-7463 |
| 通讯作者 | Jiang, P (reprint author), NCNST, Beijing 100190, Peoples R China. |
| 中文摘要 | Self-assembled monolayers (SAMs) of para- and ortho-fluorothiophenol (p- and o-FTP) spontaneously formed on Au(111) substrate have been contrasted through investigation by a scanning tunneling microscope (STM) at room temperature. High-resolution STM imaging reveals that p-FTP adopts a 6 x root 3R30 degrees molecule arrangement containing six molecules. Two different kinds of p-FTP molecule dimer line structures have been formed on Au(111) by intermolecular pi-pi stacking along < 112 > substrate directions, besides a single p-FTP molecule line. In contrast, o-FTP molecules self-assemble into a much looser wave-like SAM, which can be described as a 5 x 3 root 3R30 degrees structure containing two molecules. Periodic density functional theory (DFT) calculations for the two systems suggest that these kinds of FTP molecules preferentially take the asymmetrical positions between 3-fold face-centered cubic (fcc) hollow and bridge sites on Au(111), tilting from the substrate surface. Theoretical simulation gives apparent average tilted angles of 58 degrees and 68 degrees for p-FTP and o-FTP with respect to the surface normal, respectively. This simulation shows that o-FTP is more inclined to lie down toward the Au(111) surface compared to p-FTP. The difference between p-FTP and o-FTP SAM structures can be qualitatively understood in terms of the variation of intermolecular dipole-dipole orientation. This suggests that, besides well-known Au-S and pi-pi interactions, electrostatic interactions including dipole-dipole, quadrupole-quadrupole, and dipole-quadrupole interactions might also play an important role in influencing the SAM structures formed by aromatic thiols with a permanent dipole moment. |
| 收录类别 | SCI |
| 资助信息 | National Natural Science Foundation of China [50772024, 50602007]; National Basic Research Program of China [2009CB930702]; NCNST; CEA |
| 语种 | 英语 |
| 公开日期 | 2013-09-24 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/53081]  |
| 专题 | 物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文 |
| 推荐引用方式 GB/T 7714 | Jiang, P,Deng, K,Fichou, D,et al. STM Imaging ortho- and para-Fluorothiophenol Self-Assembled Monolayers on Au(111)[J]. LANGMUIR,2009,25(9):5012. |
| APA | Jiang, P,Deng, K,Fichou, D,Xie, SS,Nion, A,&Wang, C.(2009).STM Imaging ortho- and para-Fluorothiophenol Self-Assembled Monolayers on Au(111).LANGMUIR,25(9),5012. |
| MLA | Jiang, P,et al."STM Imaging ortho- and para-Fluorothiophenol Self-Assembled Monolayers on Au(111)".LANGMUIR 25.9(2009):5012. |
入库方式： OAI收割
来源：物理研究所
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