Exfoliation and Characterization of 2D Materials

The monolayers -as thin as a single layer of atoms- of 2D materials have demonstrated distinctive electronic, optical, and catalytic properties. These 2D semiconductors with different bandgap energies can be put together to form a heterojunction to tune the properties of the material for different optoelectronics applications. This study focuses on the exfoliation of various 2D materials using the noble idea of mechanical exfoliation by scotch tape. The monolayers of exfoliated materials are investigated using optical and electrical characterization techniques. Finally, physical modification strategies are demonstrated to effectively tune the intrinsic electronic structures for various optoelectronic applications.