One significant advantage of 2D materials is their diversity. There are many different types of 2D material, all with different properties. For example, graphene is an electrical conductor, molybdenum disulfide is a semiconductor, while boron nitride is an insulator. In principle, this means that such nanosheets can be combined to yield electronic devices. In the Coleman group, we aim to produce and test printed electronic devices. Usually such devices consist of heterostructures containing different 2D materials occupying different roles. For example, in a printed capacitor networks of graphene nanosheets would act as the electrodes whereas a network of boron nitride nanosheets would act as the dielectric. Recently, we demonstrated that entire field effect transistors could be printed using only 2D materials with graphene providing the source, drain and gate electrodes, tungsten diselenide acting as the channel and a network of boron nitride nanosheets acting as the dielectric.
Energy Storage Fabricating an all-printed, all-nanosheet, transistor.
