Electric field-induced adsorption change of 1,3,5-benzenetricarboxylic acid on gold, silver, and copper electrode surfaces investigated by surface-enhanced Raman scattering

Youngmin Kim, Kyungnam Cho, Kangtaek Lee, Jaebum Choo, Myoung seon Gong, Sang Woo Joo

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Abstract

The potential-induced adsorption structure of 1,3,5-benzenetricarboxylic acid (trimesic acid TMA) on Au, Ag, and Cu electrode surfaces has been examined by means of surface-enhanced Raman scattering (SERS) in an applied voltage range between -0.6 and 0.6 V. Spectral analyses indicate that TMA is assumed to have a perpendicular geometry with its benzene ring on Au, Ag, and Cu surfaces. The carboxylate band's strong appearance at ∼1390 cm-1 indicates that TMA should bind to the metal surfaces via its carboxylate group. As the electric potential is shifted from 0.6 to -0.6 V, the adsorption of TMA onto the electrodes' surfaces appears to change, as indicated by the frequency shift or the change in the vibrational bands' intensity. As previously reported [B. Han, Z. Li, S. Pronkin, Th. Wandlowski, Can. J. Phys. 82 (2004) 1481], depending on the applied electric field, it seems possible that TMA may form several distinctly different adlayer structures on an Au surface between 0 and 0.4 V. Such a potential-dependent adsorption change depending on the applied electric field is not found to occur on Ag and Cu under our potential region.

Original languageEnglish
Pages (from-to)155-161
Number of pages7
JournalJournal of Molecular Structure
Volume878
Issue number1-3
DOIs
Publication statusPublished - 2008 Apr 30

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All Science Journal Classification (ASJC) codes

  • Analytical Chemistry
  • Spectroscopy
  • Organic Chemistry
  • Inorganic Chemistry

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