In situ monitoring of the self-assembly of p-nitroanilino terminated thiol on gold: A study by IR-vis sum-frequency generation spectroscopy

Ch Humbert, M. Buck, A. Calderone, J. P. Vigneron, V. Meunier, B. Champagne, Wan Quan Zheng, A. Tadjeddine, P. A. Thiry, A. Peremans

Research output: Contribution to journalArticlepeer-review

Abstract

We report on a vibrational study of the self-assembly of para-nitroanilino-dodecane-thiol (p-NAT, NO2-C6H4-NH-(CH2)12-SH) molecules on polycrystalline gold surfaces, by means of sum-frequency generation (SFG). In the investigated spectral range (1150 to 1400 cm-1), the evolution of the vibrational fingerprint indicates that important reorientations of the molecules occur during film growth, until a stable conformation is reached slightly before saturation coverage. The experimental data are interpreted with the help of ab initio calculations from which the geometrical orientation of the self-assembled molecules can be deduced.

Original languageEnglish
Pages (from-to)129-136
Number of pages8
JournalPhysica Status Solidi (A) Applied Research
Volume175
Issue number1
DOIs
Publication statusPublished - 1 Sep 1999

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