Restructuring of Octanethiolate and Dialkyldithiocarbamate Monolayers in the Formation of Sequentially Adsorbed Mixed Monolayers

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• 作者：Annette F. Raigoza ; George Kolettis ; D. Andres Villalba ; S. Alex Kandel
• 刊名：Journal of Physical Chemistry C
• 出版年：2011
• 出版时间：October 20, 2011
• 年：2011
• 卷：115
• 期：41
• 页码：20274-20281
• 全文大小：1143K
• 年卷期：v.115,no.41(October 20, 2011)
• ISSN：1932-7455

文摘

Two-component octanethiolate-dialkyldithiocarbamate (DTC) monolayers were formed on Au(111) surfaces and studied using scanning tunneling microscopy (STM). Octanethiolate monolayers exposed to DTC in solution results in the erosion of octanethiolate domain boundaries and areas along terrace step edges and the insertion of DTC into these areas; this is consistent with the broad literature of substitution in alkanethiolate monolayers. Conversely, a DTC monolayer exposed to octanethiol results in displacement of DTC and the eventual formation of ordered octanethiolate domains. The effects of temperature, solution concentration, and deposition time are investigated.