Field Emission from Porous Sponge-Like Graphene

Herein, a unique porous sponge-like structured graphene has been proposed as field emission emitter. The synthesis process, post treatment and characterizations of the porous sponge-like graphene have been described, and its field emission properties have been researched. Compared to other kind of reported graphene structures, relative low turn-on field could be achieved due to its wide spacing separated surface morphology and vertically stand graphene sheets field emitters.