Novelmethods for preparing EC STM tips

R. Kazinczi, E. Szocs, E. Kálmán, P. Nagy

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

We present a dynamic electrochemical etching technique for preparing scanning tunneling microscope (STM) tips. Current vs. potential measurements have led to the development of a dynamic technique which provides atomic resolution and which is faster and more reliable, reproducible and productive than conventional static methods. Tungsten tips are prepared in a 2MNaOH film while the electrolyte is flowing through the film, keeping concentrations and etching rate constant. In order to apply the STM in liquids, an appropriate tip insulating technique is developed so as to prevent Faradaic current. A molten thermoplastic wax film is used for reproducible insulation. The STM tips and insulated tips were characterized by optical microscopy, scanning electron microscopy, STM, and electrochemical STM. Imaging with atomic resolution was demonstrated on HOPG.

Original languageEnglish
JournalApplied Physics A: Materials Science and Processing
Volume66
Issue numberSUPPL. 1
DOIs
Publication statusPublished - 1998

Fingerprint

Microscopes
microscopes
Scanning
scanning
etching
Electrochemical etching
Tungsten
waxes
Waxes
insulation
Thermoplastics
Electrolytes
Optical microscopy
Molten materials
Insulation
Etching
Rate constants
tungsten
electrolytes
microscopy

ASJC Scopus subject areas

  • Materials Science(all)
  • Chemistry(all)

Cite this

Novelmethods for preparing EC STM tips. / Kazinczi, R.; Szocs, E.; Kálmán, E.; Nagy, P.

In: Applied Physics A: Materials Science and Processing, Vol. 66, No. SUPPL. 1, 1998.

Research output: Contribution to journalArticle

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