Formation and Characterization of a Highly Ordered and Well-Anchored Alkylsilane Monolayer on Mica by Self-Assembly

Carl R. Kessel, Steve Granick

Research output: Contribution to journalArticlepeer-review

Abstract

A close-packed, well-ordered monolayer can be formed on a freshly cleaved muscovite mica surface by allowing hydrolyzed octadecyltriethoxysilane to self-assemble from a dilute hydrocarbon solution. The alkyl chains in the monolayer deposited by this method appear to be in a pseudocrystalline environment. Contact angle measurements and Fourier transform infrared spectroscopy indicate that the layer is in all respects equal to a Langmuir-Blodgett monolayer in packing density (≈ 20 A2/molecule) and order, but the adhesion of the self-assembled monolayer to the mica surface is much better than that obtainable by any other method of monolayer formation. The self-assembling species, octadecylsilanetriol or low- order oligomers, is shown to be surprisingly stable to condensation in dilute solution. The ability to form robust, well-ordered monolayers on mica should open up new possibilities for tailor-made surfaces to be studied in the surface forces apparatus.

Original languageEnglish (US)
Pages (from-to)532-538
Number of pages7
JournalLangmuir
Volume7
Issue number3
DOIs
StatePublished - Mar 1 1991

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

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