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Synthesis and adsorption on gold surfaces of a functionalized thiol: elaboration and test of a new nitroaromatic gas sensor.

Authors
  • Pasquinet, E
  • Bouvier, C
  • Thery-Merland, F
  • Hairault, L
  • Lebret, B
  • Méthivier, C
  • Pradier, C M
Type
Published Article
Journal
Journal of colloid and interface science
Publication Date
Apr 01, 2004
Volume
272
Issue
1
Pages
21–27
Identifiers
PMID: 14985018
Source
Medline
License
Unknown

Abstract

A new type of sensor was built by synthesizing a long-chain thiol functionalized with an aromatic head group and grafting it onto a gold surface. The synthesis route is here described, together with the IR, MS, and RMN analysis of the new product. Adsorption of the latter onto gold was assessed by a combination of RAIRS and XPS data. Those reveal that a monolayer of thiol is adsorbed and oriented with the benzene groups toward the external part of the layer. Detection tests were performed in various atmospheres by QCM. The response shows good sensitivity to 2,4-dinitrotrifluoromethoxybenzene as a model of nitroaromatic compound.

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