期刊
ULTRAMICROSCOPY
卷 109, 期 8, 页码 1011-1014出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ultramic.2009.03.036
关键词
Benzenethiol; Self-assembled monolayers; Scanning tunneling microscopy; Structural order; Solution temperature
类别
Benzenethiol (BT) self-assembled monolayers (SAMs) on Au(111) were prepared as a function of solution temperature after immersion in a 1 mM ethanol solution for 1 day. The surface structures of BT SAMs were examined by means of scanning tunneling microscopy (STM). Although BT molecules usually form disordered SAMs containing the Au adatom islands at room temperature, we found that they formed two-dimensional ordered SAMs containing a large size domain at a high solution temperature of 50 or 75 degrees C. High-resolution STM imaging revealed that BT SAMs on Au(111) formed at 50 degrees C have a (2 x 3 root 2)R23 degrees packing structure. From our STM study, we revealed that two-dimensional ordered BT SAMs on Au(111) can be obtained by changing the solution temperature. (C) 2009 Elsevier B.V. All rights reserved.
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