Nanoelectrode scanning probes from fluorocarbon-coated single-walled carbon nanotubes

Maria J. Esplandiu, Vern G. Bittner, Konstantinos P. Giapis, C. Patrick Collier

Research output: Contribution to journalArticleResearchpeer-review

40 Citations (Scopus)

Abstract

We have developed a method to coat single-walled carbon nanotubes attached to AFM tips with conformal fluorocarbon polymer films formed in an inductively coupled plasma reactor. The polymer provides a chemically inert and electrically insulating outer layer and mechanically stabilizes the attached nanotube sufficiently to enable imaging in liquids without the need for an intervening adhesive. Electrical pulse etching of the insulating coating exclusively at the nanotube tip end results in well-defined highly conductive nanoelectrodes. For these probes, the conductive properties of the nanotubes are not affected by the coating. Some nanoelectrodes behave as rectifying diodes, which may be developed into novel molecular devices integrated onto scanning probes.
Original languageEnglish
Pages (from-to)1873-1879
JournalNano Letters
Volume4
Issue number10
DOIs
Publication statusPublished - 1 Oct 2004

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