Open AccessМодификация эмиссионной поверхности науглероженного иридиевого полевого эмиттера при адсорбции атомов бария
Author(s) -
Д.П. Бернацкий,
В.Г. Павлов
Publication year - 2021
Publication title -
pisʹma v žurnal tehničeskoj fiziki
Language(s) - English
Resource type - Journals
eISSN - 1726-7471
pISSN - 0320-0116
DOI - 10.21883/pjtf.2021.18.51466.18854
Subject(s) - barium , field electron emission , materials science , iridium , annealing (glass) , field emission microscopy , monolayer , graphene , analytical chemistry (journal) , electron , nanotechnology , chemistry , optics , diffraction , physics , biochemistry , composite material , quantum mechanics , chromatography , metallurgy , catalysis
Field electron microscopy was used to study the modification of the emission surface of a carbonized iridium field emitter when the concentration of barium atoms on the surface changes within the monolayer coating. When barium atoms are adsorbed at a temperature of T=300 K, no significant changes in the field electronic images of the emission surface are observed. The formation of barium islands on graphene in the region of the (100) iridium face at the annealing temperature T=1200 K was detected. At the annealing temperature T=1500 K, the barium island is dissolved and graphene is intercalated by barium atoms. The emission surface increases and becomes uniform in emission.