Effect of the pH in the growth of benzotriazole model layers at realistic environmental conditions

Andrea Mirarco, Stephen M. Francis, Christopher J. Baddeley, Antonella Glisenti, Federico Grillo

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)
21 Downloads (Pure)

Abstract

The growth of benzotriazole (BTAH) via solution deposition onto copper monolayers prepared via underpotential deposition (UPD) on Au(111)/mica substrates has been investigated using X-ray photoelectron spectroscopy (XPS) and ambient scanning tunnelling microscopy (STM) as a function of solution pH and immersion time. Adsorbed species have been found sensitive to the solution pH with a higher benzotriazole surface concentration following deposition from an acidic environment. Although the layers prepared at different pH are chemically different, as highlighted by XPS, similar morphologies are recorded via STM. These results are critically discussed in the light of some of the adsorption models previously reported.
Original languageEnglish
Pages (from-to)107-115
JournalCorrosion Science
Volume143
Early online date15 Aug 2018
DOIs
Publication statusPublished - 1 Oct 2018

Keywords

  • Copper
  • STM
  • XPS
  • Passive films
  • Oxidation

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