MoS2 Devices Using Pencil Circuits

As a semiconducting analog of two-dimensional (2D) graphene, MoS₂ monolayer is a three-atom-thick layered transition-metal dichalcogenide, composed of a stratum of molybdenum atoms sandwiched between two layers of sulfur atoms. MoS₂’s physical, chemical and opto- electrical properties can be tuned over a wide range by changing its interface and chemistry, opening potential for next generation two-dimensional flexible electronics. Here, we have developed several electronic circuits on paper using MoS₂ and graphite (from pencil) and have studied electrical, capacitive and optoelectrical properties of the flexible composite. Via this process, we envision the evolution of on-demand device fabrication by writing prescribed or innovative ‘scripts’ on paper by combining art and science. Further, such 2D circuitry will evolve into writable, accessible, cost-effective (and disposable) electronics.