Scanning electrochemical microscopy. 32. Gallium ultramicroelectrodes and their application in ion-selective probes

Chang Wei, Allen J. Bard, Imre Kapui, Géza Nagy, Klára Tóth

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Gallium ultramicroelectrodes for amperometric measurements in scanning electrochemical microscopy were fabricated by introduction of liquid Ga into drawn glass micropipets. Cyclic voltammetry of Ru(NH3)63+ and the use of this species for SECM imaging is described. Double-barrel micropipet tips with a Ga amperometric electrode and an ion-selective (K+) potentiometric probe can also be constructed. This probe was used to image the K+ activity near a 20-μm-diameter lumen of a glass capillary.

Original languageEnglish
Pages (from-to)2651-2655
Number of pages5
JournalAnalytical Chemistry
Issue number15
Publication statusPublished - Aug 1 1996


ASJC Scopus subject areas

  • Analytical Chemistry

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