Order and Orientation in Self-Assembled Long Chain Alkanephosphate Monolayers Adsorbed on Metal Oxide Substrates

Georg Hähner, R Hofer, I Klingenfuss

Research output: Contribution to journalArticlepeer-review

49 Citations (Scopus)

Abstract

Octadecylphosphoric acid ester was employed to establish monolayers on various flat oxide substrates. The films were prepared via self-assembly from a heptane/propan-2-ol solution. The alkanephosphate was found to produce oriented, well-ordered films on titanium oxide, niobium. oxide, and aluminum oxide surfaces. Contact-angle measurements and near-edge X-ray absorption fine structure spectroscopy (NEXAFS) indicate that these layers closely resemble those formed by a similar thiol-gold system, with respect to packing density, inclination, and molecular order. The preparation scheme appears to be rather universally applicable to a variety of metal oxide substrates. These systems show promise as an approach to functionalizing different oxide surfaces with well-ordered organic monolayers, with potential applications in the fields of corrosion protection, adhesion promotion, biochemical analysis, and sensors.

Original languageEnglish
Pages (from-to)7047
Number of pages7047
JournalLangmuir
Volume17
DOIs
Publication statusPublished - 30 Oct 2001

Keywords

  • FINE-STRUCTURE SPECTROSCOPY
  • LANGMUIR-BLODGETT-FILMS
  • STRUCTURAL-CHARACTERIZATION
  • MOLECULAR MONOLAYERS
  • ORGANIC-SURFACES
  • CARBOXYLIC-ACIDS
  • NATIVE OXIDES
  • GOLD SURFACES
  • ALKANETHIOLS
  • ADSORPTION

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