Electrical properties of glass microelectrodes with different tip diameters

Fu-Zen Shaw, H. W. Taso, C. T. Yen

Research output: Contribution to journalArticlepeer-review

Abstract

The electrical characteristics of glass microelectrodes with different tip diameters were investigated using a servo analyzer with the aid of a capacitance neutralization circuit. The input and distributed capacitances occurring at microelectrode-measurement interface was reduced with a specially designed capacitance neutralization circuit. Using least-square-error approximation, we found the equivalent circuit of a glass microelectrode was composed of a resistor and a capacitor in parallel. The capacitor was negligible when the tip diameter was large than 2 μm. An exponentially decreasing relationship was found between the tip diameter and the impedance of the microelectrodes.

Original languageEnglish
Pages (from-to)496-503
Number of pages8
JournalBiomedical Engineering - Applications, Basis and Communications
Volume5
Issue number4
Publication statusPublished - 1993 Jan 1

All Science Journal Classification (ASJC) codes

  • Biophysics
  • Bioengineering
  • Biomedical Engineering

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