FEM consists of a sharp needle emitter and a detector, such as a fluorescent screen. A negative electric field is applied to the emitter, emitting electrons from the surface. An image is formed at the detector due to the different current densities, which originates from the difference in electric fields and work functions on the emitter surface by the Fowler-Nordheim equation.
2Introduction to field emission
New nanostructures study findings recently were reported by researchers at National Institute for Materials Science.
Oct 04, 2010; Data detailed in 'Nanostructured LaB6 field emitter with lowest apical work function' have been presented. According to recent...