Sequestration of carbonaceous species within alkanethiol self-assembled monolayers on Ag by Raman spectroscopy

Chad E. Taylor, Mark H. Schoenfisch, Jeanne E. Pemberton

Research output: Contribution to journalArticle

21 Scopus citations

Abstract

Raman spectra of hydrogenated CnSH (where, n=3-5,8,9,12, and 18) and C8D17SH SAMs at mechanically polished (MP) Ag indicate monolayer contamination by a small polyaromatic hydrocarbon (PAH). The contaminant source at the unmodified MP Ag surface is identified using Raman spectroscopy, and thus, the contaminant is believed to be placed at this surface during the mechanical polishing procedure. Notably, the PAH contaminant is not completely removed by either solvent dissolution or alkanethiol adsorption, suggesting that it is strongly bound, and more significantly, sequestered within the alkanethiol SAM. Controlled incorporation of pyrene into dodecanethiol SAMs demonstrates that doping of alkanethiol SAMs may be possible for certain systems.

Original languageEnglish (US)
Pages (from-to)2902-2906
Number of pages5
JournalLangmuir
Volume16
Issue number6
DOIs
StatePublished - Mar 21 2000

ASJC Scopus subject areas

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

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