Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group
  • Applied Spectroscopy
  • Vol. 54,
  • Issue 3,
  • pp. 366-370
  • (2000)

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

Not Accessible

Your library or personal account may give you access

Abstract

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.

PDF Article
More Like This
Compact dual-fiber surface-enhanced Raman scattering sensor with monolayer gold nanoparticles self-assembled on optical fiber

Hongwen Zhou, Jiansheng Liu, Haitao Liu, and Zheng Zheng
Appl. Opt. 57(27) 7931-7937 (2018)

Surface enhanced infrared spectroscopy with gold strip gratings

Tao Wang, Vu Hoa Nguyen, Andreas Buchenauer, Uwe Schnakenberg, and Thomas Taubner
Opt. Express 21(7) 9005-9010 (2013)

Surface plasmon-enhanced terahertz emission from a hemicyanine self-assembled monolayer

Gopakumar Ramakrishnan, Nishant Kumar, Paul C. M. Planken, Daisuke Tanaka, and Kotaro Kajikawa
Opt. Express 20(4) 4067-4073 (2012)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved