|About this Abstract
||2010 TMS Annual Meeting & Exhibition
||Computational Thermodynamics and Kinetics
||Kinetics of Corrosive Defects Formed on Au Substrates Accompanied by Alkanethiol Monolayer Assembly in the Presence of Oxygen
||Zhong Cao, Pu-Ni Zeng, Xiao-Chuan He, Dao-Chang Huang, Ling Zhang
|On-Site Speaker (Planned)
The mechanism and kinetics of corrosive defects formed on Au substrates accompanied by alkanethiol monolayer assembly in the presence of oxygen have been investigated by using in situ quartz crystal microbalance (QCM) and atomic force microscopy (AFM). The gold lost from the in situ QCM could be well explained by the AFM image, which evidently shows the corrosive defects or holes produced on the corresponding Au surface. The initial corrosion rate on gold was calculated to be 9.2 × 1011 Au atoms cm-2 s-1. For a long-term Au corrosion occurred during alkanethiol assembled process, the kinetics behavior has been determined with an atomic absorption spectroscopy (AAS). The corrosion rate on the long-term Au dissolution on Au plates was calculated to be 1.3 × 108 Au atoms cm-2 s-1. Both corrosive kinetics equations obtained with QCM and AAS show a consistent corrosion trend on Au substrates.
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