Dresden 2011 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 77: Graphene V
O 77.8: Vortrag
Donnerstag, 17. März 2011, 16:45–17:00, WIL B321
Novel routes towards the chemical functionalization of graphenoid and graphene: Janus nanomembranes — Zhikun Zheng1, Christoph Nottbohm1, •Andrey Turchanin1, Heiko Muzik1, André Beyer1, Mike Heilemann1, Markus Sauer2, and Armin Gölzhäuser1 — 1Fakultät für Physik, Universität Bielefeld — 2Biotechnology & Biophysics, Julius-Maximilians-University Würzburg
The chemical functionalization of graphene is essential for the use in molecular sensors or nanoelectromechanical components. However, a functionalization is difficult to achieve for graphene single crystals due to their chemical inertness. Here we present a route towards the chemical functionalization of graphenoid carbon nanomembranes fabricated from self-assembled monolayers. These 1 nm thick membranes possess amino functionalities on their top sides and thiol functionalities on their bottom sides. It is demonstrated how such two-dimensional (2D) "Janus membranes" can be used for the selective immobilizations of functional molecules. As a proof of concept, we functionalized both sides with different fluorescent dyes. The functionalization is observed by X-ray photoelectron spectroscopy and fluorescence resonant energy transfer. The potential of Janus nanomembranes as a 2D-platform for the chemical functionalization of graphene is discussed.
Z. Zheng, C.T. Nottbohm, A. Turchanin, H. Muzik, A. Beyer, M. Heilemann, M. Sauer, A. Gölzhäuser, Angew. Chem. Int. Ed. 49 (2010) 8493-8497