(412a) Vapor-Phase Eta-6 Functionalization of Graphene with Retained Charge Carrier Mobility

Authors: 
Berry, V., University of Illinois at Chicago
Che, S., University of Illinois at Chicago
Nguyen, P., Kansas State University
Behura, S., University of Illinois at Chicago
Jasuja, K., Indian Institute of Technology Gandhinagar
Sreenivasan, S., Clemson University
To widen the spectrum of its applications, it is important to functionalize graphene, while preserving its superior properties, and retaining its planar lattice (for high mobility) and its carbonsâ?? sp2 hybridized state (for high carrier density). Such a functionalization mechanism, when conducted in compliance to the needs of semiconductor manufacturing processes will enable grapheneâ??s incorporation into diverse applications. Here, we develop a unique eta-6 organometallic approach to functionalize graphene in a vapor-phase process, which retains the structural and electrical properties, while offering chemical sites for interaction and interfacing with other chemical or biochemical systems. In contrast to other functionalization processes, the eta6-functionalized graphene maintained its high charge carrier mobility (1000 cm2V-1s-1 at 300 K). We will discuss the mechanism of charge transfer in eta-6 functionalization of chromium carbonyl on graphene. This process will unveil grapheneâ??s previously unknown potential to hierarchically interface with physical and biological components to produce novel systems and applications. Results will also facilitate gate-fabrication for FETs via atomic-layer-deposition (currently a major challenge).