Self-Assembly of Octadecyltrichlorosilane Monolayers on Mica

George A. Carson, Steve Granick

Research output: Contribution to journalArticlepeer-review

Abstract

A method is described to deposit a securely attached, self-assembled monolayer of octadecyltrichlorosilane (OTS) on the surface of freshly cleaved muscovite mica. Comparison of the infrared methylene spectra with those of closely packed Langmuir-Blodgett films implies that the surface coverage was a fraction 0.8-0.9 that of films formed by Langmuir-Blodgett methods. However, LB monolayers are less securely attached to the substrate. The contact angle of water on these monolayers remained over 100° for over 24 h and it suffered no noticeable degradation after prolonged reflux in cyclohexane. The method to form an OTS monolayer involves three steps: ion exchange of the native K+ ions of cleaved mica for H+ ions, control of the quantity of resulting water on the mica surface, and adsorption and surface polymerization of octadecyltrichlorosilane by self-assembly from dilute cyclohexane solution.

Original languageEnglish (US)
Pages (from-to)1745-1751
Number of pages7
JournalJournal of Materials Research
Volume5
Issue number8
DOIs
StatePublished - Aug 1990

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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