Mixed Methyl- and Propyl-Thiolate Monolayers on a Au(111) Surface
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- 作者：Jianzhi Gao ; Fangsen Li ; Quanmin Guo
- 刊名：Langmuir
- 出版年：2013
- 出版时间：September 3, 2013
- 年：2013
- 卷：29
- 期：35
- 页码：11082-11086
- 全文大小：482K
- 年卷期：v.29,no.35(September 3, 2013)
- ISSN：1520-5827
文摘
Mixed methyl- and propyl-thiolate self-assembled monolayers (SAMs) are prepared on a Au(111) surface by exposing the gold substrate to methyl-propyl-disulfide vapor at room temperature. Scanning tunneling microscopy imaging of such SAMs reveals a (3 脳 4) phase consisting of CH3-S-Au-S-CH3, CH3-S-Au-S-(CH2)2CH3, and CH3-(CH2)2-S-Au-S-(CH2)2CH3. Partial desorption of methyl-thiolate occurs when samples are thermally annealed to 373 K, leading to the formation of a striped phase consisting of primarily CH3-(CH2)2-S-Au-S-(CH2)2CH3.