A spectroscopic study of thiol layers prepared by contact printing
| Autor: | Michael Grunze, I Böhm, F. Eisert, Manfred Buck, A Lampert |
|---|---|
| Rok vydání: | 1999 |
| Předmět: |
Analytical chemistry
General Physics and Astronomy Infrared spectroscopy Self-assembled monolayer Surfaces and Interfaces General Chemistry Hexadecane Condensed Matter Physics Surfaces Coatings and Films Contact angle chemistry.chemical_compound chemistry X-ray photoelectron spectroscopy Microcontact printing Monolayer Contact print |
| Zdroj: | Applied Surface Science |
| ISSN: | 0169-4332 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect