Controlling the work function of indium tin oxide: Differentiating dipolar from local surface effects

Eric L. Bruner, Norbert Koch, Amelia R. Span, Steven L. Bernasek, Antoine Kahn, Jeffrey Schwartz

Research output: Contribution to journalArticle

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Abstract

Indium tin oxide (ITO) reacts with tetra(tert-butoxy)tin to give surface bound alkoxytin species. Ligand exchange occurs in these surface bound species by reaction with substituted phenols. The speciation of surface phenoxides was measured in ultrahigh vacuum by X-ray photoelectron spectroscopy, as was the work function for the surface modified ITO. It is shown that the molecular dipole moment of the phenol correlates strongly with the measured ITO work function change; no such correlation exists between the acidity of the phenol and this measured change in work function. Results are consistent therefore with an electrostatic model and not with one involving electronegativities of the ligated phenoxide oxygens.

Original languageEnglish (US)
Pages (from-to)3192-3193
Number of pages2
JournalJournal of the American Chemical Society
Volume124
Issue number13
DOIs
StatePublished - Apr 3 2002

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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