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A single-atom sharp iridium tip as an emitter of gas field ion sources.
Nanotechnology ; 20(33): 335701, 2009 Aug 19.
Artigo em Inglês | MEDLINE | ID: mdl-19636091
ABSTRACT
We report a reliable method for preparing a pure Ir single-atom tip by thermal treatment in oxygen. The atomic structure of the tip apex and its ion emission characteristics are investigated with field ion microscopy. We have shown that the Ir single-atom tip can be a good field ion emitter, capable of emitting a variety of gas ion beams, such as He+, H2+, N2+, and O2+, with high brightness and stability. In addition, this tip can easily be maintained and regenerated in vacuum, ensuring it has sufficient lifetime for practical applications.

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Texto completo: Disponível Coleções: Bases de dados internacionais Base de dados: MEDLINE Idioma: Inglês Revista: Nanotechnology Ano de publicação: 2009 Tipo de documento: Artigo País de afiliação: China