π共轭硫代乙酸苯乙炔酯在Au(111)上自组装单分子层的独特域结构。

Unique domain structure of pi-conjugated tolanethioacetate self-assembled monolayers on Au(111).

作者信息

Jeong Youngdo, Kwon Seungwook, Kang Yongku, Lee Changjin, Ito Eisuke, Hara Masahiko, Noh Jaegeun

机构信息

Advanced Nanomaterials Laboratory, Department of Chemistry, Hanyang University, Seoul 133-791, Republic of Korea.

出版信息

Ultramicroscopy. 2007 Oct;107(10-11):1000-3. doi: 10.1016/j.ultramic.2007.02.038. Epub 2007 May 1.

DOI:10.1016/j.ultramic.2007.02.038

PMID:17570593

Abstract

Surface structures of tolanethioacetate (TTA) self-assembled monolayers (SAMs) on Au(111), formed in a 0.5mM N,N'-dimethylformamide (DMF) solution, were investigated as a function of solution temperature by scanning tunneling microscopy (STM). The STM study revealed that thioacetyl-terminated TTA molecules on Au(111) did not form ordered SAMs at room temperature and 80 degrees C, whereas the adsorption of TTA molecules on Au(111) at a solution temperature of 50 degrees C led to the formation of two mixed phases: a disordered phase and a unique ordered phase, consisting rod-like domains, which can be described as a ( radical6x radical13)15 degrees superstructure. From this study, it was demonstrated that solution temperature is a key factor controlling the two-dimensional SAM structure of TTA molecules.

摘要

通过扫描隧道显微镜（STM）研究了在0.5mM N，N'-二甲基甲酰胺（DMF）溶液中形成的硫代乙酸苯酯（TTA）自组装单分子层（SAMs）在Au(111)上的表面结构随溶液温度的变化。STM研究表明，在室温及80℃下，Au(111)上硫代乙酰基封端的TTA分子未形成有序的SAMs，而在50℃的溶液温度下，TTA分子在Au(111)上的吸附导致形成两种混合相：无序相和独特的有序相，该有序相由棒状畴组成，可描述为(√6×√13)15°超结构。通过这项研究表明，溶液温度是控制TTA分子二维SAM结构的关键因素。