Modification of the emission surface of a carbonized iridium field emitter during the adsorption of barium atoms

Field electron microscopy was used to study the modification of emission surface a carbonized iridium field emitter when concentration barium atoms on changes within monolayer coating. When are adsorbed at temperature T=300 K, no significant in electronic images observed. The formation islands graphene region (100) face annealing T=1200 K detected. At T=1500 island is dissolved and intercalated by atoms. increases becomes uniform emission. Keywords: emission, carbon, iridium, intercalation, emitters.