Alkanethiol Reductive Desorption from Self-Assembled Monolayers on Gold, Platinum, and Palladium Substrates

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• 作者：James A. Williams ; Christopher B. Gorman
• 刊名：Journal of Physical Chemistry C
• 出版年：2007
• 出版时间：August 30, 2007
• 年：2007
• 卷：111
• 期：34
• 页码：12804 - 12810
• 全文大小：189K
• 年卷期：v.111,no.34(August 30, 2007)
• ISSN：1932-7455

文摘

The reductive desorption of n-alkanethiolate (RS-) self-assembled monolayers (SAMs) on gold, platinum, andpalladium substrates was investigated. The kinetics of this process were too slow to measure directly in thecase of RS-Pt and RS-Pd SAMs. Thus, the faradaic response of potassium ferricyanide after partial orcomplete desorption was determined and used to quantify the relative electrochemically accessible surfacearea. Both the type of underlying metal substrate and the chain length of the n-alkanethiol were varied. Therelative alkanethiol binding affinity and effective kinetics of binding for each of the substrates were discussedin light of these observations.