Self-assembly behavior and monolayer characteristics of dodecylamine on Au (111) surface

Wan Tzu Yen, Ke Hsuan Wang, Masaaki Yoshida, Murugesan Balamurugan, Takeshi Kawai, Venkatesan, Yuh Lang Lee

研究成果: Article同行評審

2 引文 斯高帕斯(Scopus)


Background: Self-assembly monolayers (SAMs) had been used widely to tailor the surface properties; and alkanthiols were the most common molecules which have been intensively studied. However, the assembly behavior of amine molecules and the characteristics of the SAMs are not well understood. Method: In this study, dodecylamine (DDA) is used as a model molecule to study the self-assembly behavior of amine molecules from HClO4 solution onto an Au(111) surface. The adsorption process and the SAM characteristics are studied via cyclic voltammetry (CV), in-situ surface-enhanced infrared absorption spectroscopy (SEIRAS) and scanning tunneling microscopy (STM). Significant findings: The CV spectra show that the current densities of Fe+2/Fe+3 redox reaction decrease slightly after the treatment of DDA, implying the formation of a DDA adlayer. The in-situ SEIRAS spectra demonstrate that the adsorption of DDA performed slowly. These results imply a weak interaction of DDA with the gold surface. The STM observation in the HClO4 solution demonstrates that the adsorbed molecules arranged in an orderly manner, forming a flat-lying orientation. The lift-off orientation commonly found for thiol molecules doesn't occur for the DDA adlayer. On the basis of this study, the self-assembly ability of DDA on a gold surface is confirmed, and a weak DDA-Au interaction is verified.

頁(從 - 到)351-358
期刊Journal of the Taiwan Institute of Chemical Engineers
出版狀態Published - 2021 9月

All Science Journal Classification (ASJC) codes

  • 一般化學
  • 一般化學工程


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