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

[en] 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.

Disciplines :

Physics

Author, co-author :

Mani, A. A.

Schultz, Z. D.

Champagne, B.

Humbert, Christophe

Dreesen, Laurent ; Université de Liège - ULiège > Département de physique > Biophotonique

Gewirth, A. A.

White, J. O.

Thiry, P. A.

Peremans, A.

Caudano, Yves

Language :

English

Title :

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

Publication date :

2004

Journal title :

Applied Surface Science

ISSN :

0169-4332

eISSN :

1873-5584

Publisher :

Elsevier Science, Amsterdam, Netherlands

Volume :

237

Pages :

444–449

Peer reviewed :

Peer Reviewed verified by ORBi

Available on ORBi :

since 26 October 2009

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