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HL: Fachverband Halbleiterphysik

HL 52: Devices

HL 52.5: Vortrag

Mittwoch, 22. März 2017, 10:45–11:00, POT 06

Heterostructures of 2D carbon materials for pH-sensing — •David Kaiser¹, Andreas Winter¹, Christof Neumann¹, Thomas Weimann², and Andrey Turchanin¹ — ¹Institute for Physical Chemistry, Friedrich Schiller University Jena, 07743 Jena, Germany — ²Physikalisch-Technische Bundesanstalt, 38116 Braunschweig, Germany

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 quality 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 via engineering of novel carbon nanomembrane (CNM)/SLG hybrids to build an electrolyte-gate FET sensor which can detect the pH value. 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 engineer hybrid CNM/SLG FETs. We show that the intrinsically high electronic quality of pristine SLG is preserved in the amino-functionalized hybrids and that sensing of pH is possible with high sensitivity.