Instrumentation for electrochemical performance characterization of neural electrodes

Michael P. Marsh, James N. Kruchowski, Seth A. Hara, Malcom B. McIntosh, Renae M. Forsman, Terry L. Reed, Christopher Kimble, Kendall H. Lee, Kevin E. Bennet, Jonathan R. Tomshine

Research output: Contribution to journalArticle

Abstract

In an effort to determine the chronic stability, sensitivity, and thus the potential viability of various neurochemical recording electrode designs and compositions, we have developed a custom device called the Voltammetry Instrument for Neurochemical Applications (VINA). Here, we describe the design of the VINA and initial testing of its functionality for prototype neurochemical sensing electrodes. The VINA consists of multiple electrode fixtures, a flowing electrolyte bath, associated reservoirs, peristaltic pump, voltage waveform generator, data acquisition hardware, and system software written in National Instrument's LabVIEW. The operation of VINA was demonstrated on a set of boron-doped diamond neurochemical recording electrodes, which were subjected to an applied waveform for a period of eighteen days. Each electrode's cyclic voltammograms (CVs) were recorded, and sensitivity calibration to dopamine (DA) was performed. Results showed an initial decline with subsequent stabilization in the CV current measured during the voltammetric sweep, corresponding closely with changes in electrode sensitivity to DA. The VINA has demonstrated itself as a useful tool for the characterization of electrode stability and chronic electrochemical performance.

Original languageEnglish (US)
Article number085101
JournalReview of Scientific Instruments
Volume88
Issue number8
DOIs
StatePublished - Aug 1 2017

ASJC Scopus subject areas

  • Instrumentation

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    Marsh, M. P., Kruchowski, J. N., Hara, S. A., McIntosh, M. B., Forsman, R. M., Reed, T. L., Kimble, C., Lee, K. H., Bennet, K. E., & Tomshine, J. R. (2017). Instrumentation for electrochemical performance characterization of neural electrodes. Review of Scientific Instruments, 88(8), [085101]. https://doi.org/10.1063/1.4993796