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Journal Article

A spectroscopic study of thiol layers prepared by contact printing


Grunze,  M.
Cellular Biophysics, Max Planck Institute for Medical Research, Max Planck Society;

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Böhm, I., Lampert, A., Buck, M., Eisert, F., & Grunze, M. (1999). A spectroscopic study of thiol layers prepared by contact printing. Applied Surface Science, 141(3-4), 237-243. doi:10.1016/S0169-4332(98)00510-8.

Cite as: https://hdl.handle.net/21.11116/0000-0001-B95D-7
Films of hexadecane thiol on gold prepared by contact printing with a stamp of polydimethylsiloxane were investigated by IR–VIS sum frequency generation (SFG), IR spectroscopy, X-ray photoelectron spectroscopy (XPS), and contact angle measurements. The contact time was up to 60 s and the pressure ranged from 1 to 6 bar. SFG, as a method directly sensitive to molecular conformation, reveals a significantly higher degree of disorder in stamped films compared to monolayers prepared by immersion. Correspondingly, contact angle measurements yield a lower advancing contact angle and a higher hysteresis. XPS analysis shows that residues of the stamping material are left on the surface.