Molecule orientation in self-assembled monolayers determined by infrared-visible sum-frequency generation spectroscopy

A. A. Mani, Z. D. Schultz, B. Champagne, C. Humbert, L. Dreesen, A. A. Gewirth, J. O. White, P. A. Thiry, A. Peremans, Y. Caudano

Research output: Contribution to journalArticle

Abstract

The molecular orientation in self-assembled monolayers of thiophenol (TP) on Ag(1 1 1) and of para-nitroanilinododecane-thiol (NAT) on Au was investigated by infrared-visible sum-frequency generation between 500 and 1500 cm -1. Ab initio calculations were performed to determine the interface nonlinear response. The combined experimental and theoretical results reveal that the S-C bond of TP is tilted 37° from the Ag(1 1 1) surface normal, with the aromatic ring plane perpendicular to the surface. On Au, the tilt angle of the NAT molecule stabilizes below 60° at the end of film growth.

Original languageEnglish
Pages (from-to)444-449
Number of pages6
JournalApplied Surface Science
Volume237
Issue number1-4
DOIs
Publication statusPublished - 15 Oct 2004

Fingerprint

Self assembled monolayers
Sulfhydryl Compounds
thiols
Spectroscopy
Infrared radiation
Molecules
Molecular orientation
Film growth
spectroscopy
molecules
rings
thiophenol

Keywords

  • Adsorbate orientation
  • Para-nitroanilino-dodecanethiol
  • Self-assembled monolayer
  • Sum-frequency generation
  • Thiophenol
  • Vibration

Cite this

Mani, A. A. ; Schultz, Z. D. ; Champagne, B. ; Humbert, C. ; Dreesen, L. ; Gewirth, A. A. ; White, J. O. ; Thiry, P. A. ; Peremans, A. ; Caudano, Y. / Molecule orientation in self-assembled monolayers determined by infrared-visible sum-frequency generation spectroscopy. In: Applied Surface Science. 2004 ; Vol. 237, No. 1-4. pp. 444-449.
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Molecule orientation in self-assembled monolayers determined by infrared-visible sum-frequency generation spectroscopy. / Mani, A. A.; Schultz, Z. D.; Champagne, B.; Humbert, C.; Dreesen, L.; Gewirth, A. A.; White, J. O.; Thiry, P. A.; Peremans, A.; Caudano, Y.

In: Applied Surface Science, Vol. 237, No. 1-4, 15.10.2004, p. 444-449.

Research output: Contribution to journalArticle

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T1 - Molecule orientation in self-assembled monolayers determined by infrared-visible sum-frequency generation spectroscopy

AU - Mani, A. A.

AU - Schultz, Z. D.

AU - Champagne, B.

AU - Humbert, C.

AU - Dreesen, L.

AU - Gewirth, A. A.

AU - White, J. O.

AU - Thiry, P. A.

AU - Peremans, A.

AU - Caudano, Y.

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