Solid contact micropipette ion selective electrode for potentiometric SECM

Gergely Gyetvai, Sören Sundblom, L. Nagy, Ari Ivaska, G. Nagy

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

New solid contact ammonium micropipette electrodes (ISE), well applicable in scanning electrochemical microscopy are reported. The solid contact was made of a PEDOT nanowire coated carbon fiber, lowered down close to the orifice, and dipped inside the cocktail being in the pipette tip. This configuration provided low electrical resistance and good potential stability. Submicron tip size, usual in case of micropipette ISE-s easily can be fabricated in this way. The applicability of the electrode in SECM has been proved in SG/TC mode imaging urease enzyme active spots in urea solutions.

Original languageEnglish
Pages (from-to)1116-1122
Number of pages7
JournalElectroanalysis
Volume19
Issue number10
DOIs
Publication statusPublished - May 2007

Fingerprint

Ion selective electrodes
Electrodes
Acoustic impedance
Urease
Orifices
Ammonium Compounds
Urea
Carbon fibers
Nanowires
Microscopic examination
Enzymes
Scanning
Imaging techniques
carbon fiber

Keywords

  • Ion selective electrodes
  • PEDOT nanowired carbon fiber
  • Scanning electrochemical microscopy
  • Solid contact

ASJC Scopus subject areas

  • Analytical Chemistry

Cite this

Solid contact micropipette ion selective electrode for potentiometric SECM. / Gyetvai, Gergely; Sundblom, Sören; Nagy, L.; Ivaska, Ari; Nagy, G.

In: Electroanalysis, Vol. 19, No. 10, 05.2007, p. 1116-1122.

Research output: Contribution to journalArticle

Gyetvai, Gergely ; Sundblom, Sören ; Nagy, L. ; Ivaska, Ari ; Nagy, G. / Solid contact micropipette ion selective electrode for potentiometric SECM. In: Electroanalysis. 2007 ; Vol. 19, No. 10. pp. 1116-1122.
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