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Regensburg 2013 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 71: Graphene - Preparation and Characterization 2 (jointly with DS, HL, MA, and O)

TT 71.3: Talk

Friday, March 15, 2013, 11:00–11:15, H17

Non-destructive chemical functionalization of single-layer graphene for electronic applicationsMirosław Woszczyna1, Miriam Grothe1, Andreas Winter2, Annika Willunat1, Stefan Wundrack1, Rainer Srosch1, Franz Ahlers1, Thomas Weimann1, and •Andrey Turchanin21Physikalisch-Technische Bundesanstalt, 38116 Braunschweig, Germany — 2Faculty of Physics, University of Bielefeld, 33615 Bielefeld, Germany

Chemical functionalization of single-layer graphene (SLG) is of key importance for implementations of this material in functional electronic devices such as, e.g., field effect transistor (FET) based nanosensors. However, the electronic quality of graphene typically degrades after the functionalization with presently employed methods, significantly restricting the application areas. Here, we present a route to non-destructive chemical functionalization of graphene via engineering of carbon nanomembrane (CNM)/SLG hybrids. We employ SLG, grown by methane CVD on Cu foils, and amino-terminated 1 nm thick CNMs, generated by electron-beam-induced crosslinking of aromatic self-assembled monolayers, to fabricate hybrid CNM/SLG FETs on oxidized silicon wafers. Structural, chemical and electronic properties of these devices are characterized by Raman spectroscopy, X-ray photoelectron spectroscopy and electrical transport measurements. We unambiguously show that the intrinsically high electronic quality of pristine SLG is preserved in the amino-functionalized hybrids opening broad avenues for their use in graphene-based FETs.

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