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Solid Contact Micropipette Ion Selective Electrode for Potentiometric SECM

✍ Scribed by Gergely Gyetvai; Sören Sundblom; Lívia Nagy; Ari Ivaska; Géza Nagy

Publisher
John Wiley and Sons
Year
2007
Tongue
English
Weight
385 KB
Volume
19
Category
Article
ISSN
1040-0397

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✦ Synopsis

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.

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