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Updated: Jul 10, 2026

A Method for Systematic Electrochemical and Electrophysiological Evaluation of Neural Recording Electrodes
Published on: March 3, 2014
On the noise performance of pt electrodes
Xiao Liu1, Andreas Demosthenous, Nick Donaldson
1Department of Electronic and Electrical Engineering, University College London, London, UK. x.liu@ee.ucl.ac.uk
Abstract:
We measured the noise and impedance from Pt electrode pairs in a frequency band from 100 Hz to 10 kHz, containing the ENG band (500 Hz 5 kHz). The results show that the Pt electrode noise is the same as the thermal noise from the real part of the electrode impedance, which is a summation of the polarisation resistance and the access resistance. This differs from Ag-AgCl electrodes for which the electrode noise has been reported to be higher than the thermal noise. Our study shows that Pt electrodes are suitable for neural recording.
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