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DS: Fachverband Dünne Schichten
DS 16: Organic Thin Films, Organic-Inorganic Interfaces
DS 16.10: Vortrag
Mittwoch, 3. April 2019, 12:00–12:15, H39
Multi-analytical investigation of tetrapodal self-assembled monolayers on gold: Formation and Functionality — •Valentina Rohnacher1,2, Frank Simon Benneckendorf2,3, Maybritt Münch2,4, Sebastian Beck1,2, and Annemarie Pucci1,2 — 1Kirchhoff Institute for Physics, Uni Heidelberg — 2Innovationlab, Heidelberg — 3Institute of Organic Chemistry, Uni Heidelberg — 4Surface Science Division, TU Darmstadt
Self-assembled monolayer (SAMs) have proven to form stable and well-defined layers on various electrode materials increasing the interfacial compatibility in organic electronic devices.[1,2] A novel tetrapodal SAM molecule with four thiol-anchor groups was synthesized which enables fourfold binding to the gold substrate, enforcing a perpendicular orientation of the molecular dipole relative to the metal surface.
We perform infrared reflection-absorption spectroscopy (IRRAS) measurements on tetrapodal diazaiptycene molecules on evaporated gold substrates to probe the orientation and quality of the SAMs. In comparison with contact angle measurement and photoelectron spectroscopy, a better understanding about the SAM formation and electrode modification was achieved.
[1] Jesper et al. Langmuir 2015, 31, 37, 10303-10309
[2] Benneckendorf et al. J. Phys. Chem. Lett. 2018, 9, 13, 3731-3737