| AVS 64th International Symposium & Exhibition | |
| 2D Materials Focus Topic | Tuesday Sessions |
| Session 2D-TuA |
| Session: | Growth of 2D Materials |
| Presenter: | Andrey Turchanin, Friedrich Schiller University Jena, Germany |
| Authors: | D. Kaiser, Friedrich Schiller University Jena, Germany A. Winter, Friedrich Schiller University Jena, Germany C. Neumann, Friedrich Schiller University Jena, Germany A. Centeno, Graphenea, Spain A. Zurutuza, Graphenea, Spain T. Weimann, Physikalisch-Technische Bundesanstalt, Germany A. Turchanin, Friedrich Schiller University Jena, Germany |
| Correspondent: | Click to Email |
Chemical functionalization of single-layer graphene (SLG) is of key importance for applications in functional electronic devices such as, e.g., field-effect transistor (FET) based nanosensors. However, the electronic structure of graphene is typically degraded after the functionalization, which significantly restricts the applications. Here, we employ a route to non-destructive chemical functionalization of graphene with amino terminated 1 nm thick carbon nanomembranes1 (NH2-CNM) generated via electron beam induced crosslinking of aromatic self-assembled monolayers. The electrical response of the NH2-CNM/SLG heterostructures in electrolyte-gated FETs shows their high electrical capacitance enabling for effective sensor applications. The electrochemical performance of CNM/graphene FETs for detection of pH-values was studied in parallel with their in detail surface science characterization. We show that the high electronic performance of pristine SLG is preserved in the developed amino-terminated hybrids and demonstrate the pH-sensing with excellent sensitivity and reproducibility. Finally, we discuss the perspectives for highly selective biological sensing with the developed device concepts.
[1] A. Turchanin and A. Gölzhäuser, Carbon Nanomembranes, Adv. Mater. 28 (2016) 5075