Space charge neutralization by suspended graphene in nanoscale vacuum electronic devices

Graphene possesses many fascinating properties originating from the manifold potential for interactions at electronic, atomic, or molecular levels. Being a two-dimensional atomic crystal, graphene is transmissive to impinging electrons while being impermeable to atoms and molecules. Harboring a 2D electron system, graphene can be highly conductive in in-plane transport and is expected to be interactive with out-of-plane incident electrons as well.