| AVS 64th International Symposium & Exhibition | |
| 2D Materials Focus Topic | Tuesday Sessions |
| Session 2D+BI+MN+SS-TuA |
| Session: | Surface Chemistry, Functionalization, Bio and Sensor Applications |
| Presenter: | RamSurya Gona, University of Pennsylvania |
| Authors: | R.S. Gona, University of Pennsylvania C.H. Naylor, University of Pennsylvania A.T. Johnson, University of Pennsylvania |
| Correspondent: | Click to Email |
Two dimensional transition metal dichalcogenides, such as MoS2 and WS2, have been shown to be promising materials for use in bio-sensing. I will present our work on the fabrication of scalable flexible MoS2 field effect transistors with patterned graphene back-gate. Flexible devices were fabricated on a Kapton substrate and incorporating graphene as the back-gate material due to its biocompatibility and its favorable physical properties. Monolayer MoS2 single-crystal flakes were grown over large area by chemical vapor deposition, and then transferred onto a pre-patterned electrode array, resulting in a device yield > 70% and an average mobility of 1.0 cm2V-1s-1. To create nano-biosensors, the surface of the MoS2 was functionalized via a reengineered mu-opioid receptor and the devices were tested against opioid solutions of various concentrations. This work provides a pathway for the integration of MoS2 and other TMDs onto flexible/wearable/implantable devices that for trace detection of opioids or other chemicals. This work was supported by the National Science Foundation through EFRI 2DARE ENG-1542879