Elsevier, Sensors and Actuators A: Physical, (221), p. 139-147, 2015
DOI: 10.1016/j.sna.2014.10.010
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Research numbers trode nitride driven measurements and trodes. potential electrodes similar pneumatic-driven conventional using multichannel electroencephalographic recordings is increasingly characterized by greater of electrodes. With up to 256 silver/silver chloride (Ag/AgCl) electrodes, preparation and elec- placement is time consuming and error prone. We propose a novel type of dry titanium/titanium (Ti/TiN) electrode, integrated into a novel electroencephalography (EEG) cap based on pneumatic- mechanisms. The electrodes were characterized electrochemically and comparative biosignal were carried out. In a NaCl solution, the impedance values were between 824 and 54 ? the phase values between –52 and –10◦at frequencies between 5 Hz and 10 kHz for the Ti/TiN elec- For resting-state EEG, and with eye movements, alpha activity, and pattern reversal visual evoked (VEP), there were no significant differences between adjacent novel Ti/TiN and standard Ag/AgCl in 97.2% of the signal episodes investigated. The potential maps for pattern reversal VEP were with both types of electrodes. In conclusion, our novel cap system based on Ti/TiN electrodes and mechanisms enables completely dry EEG acquisition and can thus potentially replace Ag/AgCl electrodes due to similar signal quality.