FABRICATION OF 2-DIMENSIONAL MOLYBDENUM DISULFIDE (MOS2) AND TUNGSTEN DISULFIDE (WS2) BASED MATERIALS FOR FIELD EMISSION APPLICATIONS

Abstract

The isolation of graphene and discovery of its remarkable properties have led to renewed interest in inorganic two-dimensional (2D) materials with unique electronic and optical attributes. Of these, MoS2 and WS2 are among the most widely studied for their potential applications in nanoscale electronics. However, controlled fabrication and understanding of the growth mechanism of 2D MoS2 and WS2 need to be established before these emerging materials can be realized for practical applications. Although v 2D MoS2 and WS2 have been synthesized by various techniques, the use of physical vapour deposition methods remains largely unexplored. The aims of this project are thus to grow ultrathin and highly crystalline MoS2 and WS2 using physical techniques such as pulsed laser deposition and sputtering, to investigate their growth mechanism via these methods, and to fabricate MoS2- and WS2-based field emitters.