Iridium single atom tips fabricated by field assisted reactive gas etching

From National Research Council Canada

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DOIResolve DOI: https://doi.org/10.1016/j.apsusc.2016.01.080
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Name affiliation
  1. National Research Council of Canada. National Institute for Nanotechnology
FormatText, Article
Abstract
We present a simple, reliable method to fabricate Ir single atom tips (SATs) from polycrystalline wire. An electrochemical etch in CaCl2 solution is followed by a field assisted reactive gas etch in vacuum at room temperature using oxygen as an etching gas and neon as an imaging gas. Once formed, SATs are cooled to liquid nitrogen temperatures and their underlying structure is examined through evaporation of the apex atoms. Furthermore, a method is developed to repair Ir SATs at liquid nitrogen temperatures when apex atoms evaporate. This method may be used to fabricate Ir SAT ion sources.
Publication date
PublisherElsevier
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  • Applied Surface Science 367: 277–280.
LanguageEnglish
Peer reviewedYes
NPARC number21277235
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Record created2016-01-18
Record modified2020-06-04
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