Iridium single atom tips fabricated by field assisted reactive gas etching

Download	View accepted manuscript: Iridium single atom tips fabricated by field assisted reactive gas etching (PDF, 513 KB)
DOI	Resolve DOI: http://doi.org/10.1016/j.apsusc.2016.01.080
Author	Search for: Wood, John A.¹ ; Search for: Urban, Radovan¹ ; Search for: Salomons, Mark¹ ; Search for: Cloutier, Martin¹ ; Search for: Wolkow, Robert A.¹ ; Search for: Pitters, Jason L.¹
Name affiliation	NINT
Type	Article
Journal title	Applied Surface Science
ISSN	0169-4332
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	2016-01-12
Language	English
Peer reviewed	Yes
Identifier	S0169433216001173
NPARC number	21277235
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Record identifier	db4b471f-ee9e-4877-8ed6-dd5e5e06d936
Record created	2016-01-18
Record modified	2016-05-09