五氟苯硫醇在 Au(111)上自组装形成长程有序超晶格。

Formation and superlattice of long-range-ordered self-assembled monolayers of pentafluorobenzenethiols on Au(111).

机构信息

Department of Chemistry, Hanyang University, 17 Haengdang-dong, Seongdong-gu, Seoul 133-791, Korea.

出版信息

Langmuir. 2010 Mar 2;26(5):2983-5. doi: 10.1021/la903952c.

PMID:20131891

Abstract

The formation and surface structure of pentafluorobenzenethiol (PFBT) self-assembled monolayers (SAMs) on Au(111) formed under various experimental conditions were examined by means of scanning tunneling microscopy (STM). Although it is well known that PFBT molecules on metal surfaces do not form ordered SAMs, we clearly revealed for the first time that the adsorption of PFBT on Au(111) at 75 degrees C for 2 h yields long-range, well-ordered self-assembled monolayers having a (2 x 5 square root(13))R30 degrees superlattice. Our results will provide new insight into controlling the structural order of PFBT SAMs, which will be very useful in precisely tailoring the interface properties of metal surfaces in electronic devices.

摘要

通过扫描隧道显微镜（STM）研究了在不同实验条件下形成于 Au(111)表面的五氟苯硫醇（PFBT）自组装单分子层（SAM）的形成和表面结构。尽管众所周知，金属表面上的 PFBT 分子不会形成有序的 SAM，但我们首次清晰地揭示出，在 75°C 下吸附 2 小时的 PFBT 在 Au(111)上形成具有（2 x 5 根号(13))R30 度超晶格的长程、有序的自组装单分子层。我们的研究结果将为控制 PFBT SAM 的结构有序性提供新的思路，这对于在电子器件中精确调整金属表面的界面性质将非常有用。