OSA's Digital Library

Applied Spectroscopy

Applied Spectroscopy


  • Vol. 54, Iss. 3 — Mar. 1, 2000
  • pp: 366–370

Self-Assembled Monolayers of Thiophenol on Gold as a Novel Substrate for Surface-Enhanced Infrared Absorption

John A. Seelenbinder, Chris W. Brown, and Daniel W. Urish

Applied Spectroscopy, Vol. 54, Issue 3, pp. 366-370 (2000)

View Full Text Article

Acrobat PDF (216 KB)

Browse Journals / Lookup Meetings

Browse by Journal and Year


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools

  • Export Citation/Save Click for help


A unique method of obtaining surface-enhanced infrared absorption (SEIRA) spectra for chemicals that will not chemically attach to a metal surface has been investigated. Surface enhancements are greatest for molecules that bind to metals. In order to achieve greater enhancement for those analytes that do not bind to SEIRA metals, we have investigated self-assembled monolayers as a means of linking analytes to a gold substrate. Monolayers of thiophenol were formed onto sputter-coated gold-silicon substrates. Analytes were deposited onto the thiophenol-coated gold-silicon wafers, and external reflection SEIRA spectra were then measured. Enhancement factors as high as 30-fold compared to those for conventional SEIRA substrates are demonstrated. The self-assembled monolayers on gold substrates are shown to change both relative intensities and band positions of the adsorbed analyte. These intensity changes and frequency shifts show strong interaction of selected analytes with the self-assembled monolayer. This study of phthalates and nitrosubstituted aromatic compounds demonstrates the usefulness of the technique. Spectral changes evident through the use of the thiophenol monolayer are discussed. Index Headings: Surface-enhanced infrared absorption; SEIRA; Self-assembled monolayers; Thiophenol; Gold substrates.

John A. Seelenbinder, Chris W. Brown, and Daniel W. Urish, "Self-Assembled Monolayers of Thiophenol on Gold as a Novel Substrate for Surface-Enhanced Infrared Absorption," Appl. Spectrosc. 54, 366-370 (2000)

Sort:  Journal  |  Reset


References are not available for this paper.

Cited By

OSA is able to provide readers links to articles that cite this paper by participating in CrossRef's Cited-By Linking service. CrossRef includes content from more than 3000 publishers and societies. In addition to listing OSA journal articles that cite this paper, citing articles from other participating publishers will also be listed.

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited