Tungstate sharpening: a versatile method for extending the profile of ultra sharp tungsten probes.
Rev Sci Instrum
; 84(3): 035107, 2013 Mar.
Article
em En
| MEDLINE
| ID: mdl-23556852
ABSTRACT
The benefits of a new electrochemical etching method for the controlled sharpening of sub-micron tungsten probes are demonstrated. The proposed technique only utilizes the insulating effect of the WO4(2-) by-product which offers more practical ways of controlling the process parameters. The electrosharpening method was fully automated through the analysis of the process current, bulk coulometry, shadowgraphs, and time lapse microscopy. Tip radii smaller than 15 nm were maintained over a wide range of controlled lengths up to 4.5 mm with conic angles of less than 1°.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Idioma:
En
Revista:
Rev Sci Instrum
Ano de publicação:
2013
Tipo de documento:
Article
País de afiliação:
Reino Unido