Insulated gold scanning tunneling microscopy probes for recognition tunneling in an aqueous environment

Michael Tuchband, Jin He, Shuo Huang, Stuart Lindsay

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Chemically functionalized probes are required for tunneling measurements made via chemical contacts (Recognition Tunneling). Here, we describe the etching of gold STM probes suitable for chemical functionalization with moieties bearing thiol groups. Insulated with high density polyethylene, these probes may be used in aqueous electrolytes with sub pA leakage currents. The area of the exposed probe surface was characterized via the saturation current in an electroactive solution (0.1 M K 3Fe(CN) 6). Twenty five percent of the probes had an exposed region of 10 nm radius or less.

Original languageEnglish (US)
Article number015102
JournalReview of Scientific Instruments
Volume83
Issue number1
DOIs
StatePublished - Jan 2012

Fingerprint

Scanning Tunnelling Microscopy
Scanning tunneling microscopy
Polyethylene
Sulfhydryl Compounds
Gold
Electrolytes
scanning tunneling microscopy
gold
probes
Bearings (structural)
Saturation (materials composition)
High density polyethylenes
thiols
Leakage currents
polyethylenes
Etching
leakage
etching
electrolytes
saturation

ASJC Scopus subject areas

  • Instrumentation
  • Medicine(all)

Cite this

Insulated gold scanning tunneling microscopy probes for recognition tunneling in an aqueous environment. / Tuchband, Michael; He, Jin; Huang, Shuo; Lindsay, Stuart.

In: Review of Scientific Instruments, Vol. 83, No. 1, 015102, 01.2012.

Research output: Contribution to journalArticle

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