Dresden 2017 – wissenschaftliches Programm
CPP 69.3: Vortrag
Freitag, 24. März 2017, 10:45–11:00, ZEU 114
Transfer and characterization of covalently modified large area graphene — •Felix Rösicke1,2, Marc A. Gluba1, Christoph Kratz3, Timur Shaykhutdinov3, Norbert H. Nickel1, Jörg Rappich1, and Karsten Hinrichs3 — 1Helmholtz- Zentrum Berlin für Materialien und Energie GmbH, Berlin, Germany — 2SALSA - School of Analytical Sciences Adlershof, Berlin, Germany — 3Leibniz - Institut für Analytische Wissenschaften - ISAS - e.V., Department Berlin, Berlin, Germany
We have investigated the electrochemical grafting of CVD grown large area graphene, as grown on copper, by p-(N-maleimido)phenyl residues from the respective diazonium salt (p (N maleimido)phenylbenzenediazonium tetrafluoroborate). The samples were characterized using Raman backscattering and infrared spectroscopic ellipsometry measurements, both prior and after transfer to a thin gold film on silicon. Optical simulations of the C=O vibrations were performed, determining the thickness of the functional layer to approximately 4 nm, showing the possibility of a lossless transfer. Furthermore, AFM-IR experiments were performed to confirm both the thickness and homogeneity of the maleimido layer. To prove the reactivity of the p-(N-maleimido)phenyl layer, the Michael addition of a thiol was monitored via IR-microscopy. Considering the variety of possible diazonium cations, this opens the possibility to the use of modified graphene as tailored modular building block for facile and specific surface functionalization.