All-carbon heterostructures self-assembly during field electron emission from diamond nanotipстатьяИсследовательская статья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 10 апреля 2024 г.
Аннотация:In this study we demonstrate formation of all-carbon heterostructures induced by field electron emission fromdiamond needle-shaped crystallites with nanoscale tips. We show that at certain experimental conditions acarbon nanoprotrusion can be formed at the apex of a diamond emitter. Staircase-like current-voltage curvesobserved for such emitters indicated the presence of the Coulomb blockade effect in the self-assembled all-carbonheterostructures. The mechanism of nanoprotrusion formation via the field-induced surface diffusion of carbonatoms is revealed by observing the structural transformation of the emitter material using transmission electronmicroscopy. We also explore how the properties of the formed heterostructures evolve with the field emissioncurrent, and show that the characteristic size of the formed nanoprotrusion depends on the dimensions of thediamond nanotip. The developed approach offers a way to reproducible fabrication of heterostructured emitterswhich can be applied as coherent single-electron sources in vacuum nanoelectronics and electron quantumoptics.