Theories of field emission from graphene based on thin-slab and atomic-array models

This paper is directed towards the problems of closed CNTs. The two most serious difficulties occur because a closed CNT is one atom thick, and because a closed CNT can be small and sharp. This paper addresses the first of these difficulties, by exploring the properties of a new field emission model, namely the thin-slab model. As a first step, we investigate the properties of a flat thin slab, which can be considered as a basic model for field electron emission from the flat face of a graphene sheet. The model is parameterised using data for graphene.