Investigation of the chemical nature of two-dimensional polymerized octadecyltrimethoxysilane Langmuir films by inelastic electron tunneling spectroscopy

J. L. Brousseau, S. Vidon, R. M. Leblanc

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

High resolution vibrational spectra of Langmuir films of octadecyltrimethoxysilane (C18TMS) have been obtained by Inelastic Electron Tunneling Spectroscopy (IETS) in order to identify chemical modifications of C18TMS occurring at the air-water interface when the pH of the subphase is changed. The Langmuir films have been transferred onto an aluminum electrode by the Langmuir-Schaefer technique at three different acidic pH: 1.3, 3.3, and 3.8. The former was expected to promote the formation of polysiloxane polymers, while the latter was presumed to considerably slow down the condensation reaction, although the hydrolysis is effective. These assumptions found a direct proof in the vibrational fingerprint of C18TMS. Finally, we show that IETS is the most appropriate technique for the vibrational study of such films.

Original languageEnglish (US)
Pages (from-to)7391-7396
Number of pages6
JournalJournal of Chemical Physics
Volume108
Issue number17
DOIs
StatePublished - May 1 1998

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

Fingerprint Dive into the research topics of 'Investigation of the chemical nature of two-dimensional polymerized octadecyltrimethoxysilane Langmuir films by inelastic electron tunneling spectroscopy'. Together they form a unique fingerprint.

Cite this