Quantitative measurements of adsorbate-adsorbate interactions at solid-liquid interfaces

Taranovskyy A., Tansel T., Magnussen O.

Physical Review Letters, vol.104, no.10, 2010 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 104 Issue: 10
  • Publication Date: 2010
  • Doi Number: 10.1103/physrevlett.104.106101
  • Journal Name: Physical Review Letters
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Hacettepe University Affiliated: No

Abstract

The interactions between adsorbates at a solid-liquid interface were studied by video-rate STM for the case of sulfur on Cu(100) electrode surfaces in HCl solution. Quantitative data were obtained by analyzing the Sad dimer dynamics within the surrounding c(2×2)-Cl adlattice as well as the adsorbate configurations. The interactions are repulsive for Sad separated by one or two lattice spacings and attractive at a separation of √2 with energies comparable to adsorbates at the solid-vacuum interface. The Sad diffusion barriers are significantly reduced in the vicinity of a neighboring adsorbate. © 2010 The American Physical Society.