Electro-deposited Nanoporous Platinum Electrode for EEG Monitoring.
10.3346/jkms.2018.33.e154
- Author:
Do Youn KIM
1
;
Yunseo KU
;
Joong Woo AHN
;
Chiheon KWON
;
Hee Chan KIM
Author Information
1. Interdisciplinary Program for Bioengineering, Graduate School, Seoul National University, Seoul, Korea.
- Publication Type:Original Article
- Keywords:
Electroencephalogram;
Nanoporous Pt;
Skin-electrode Impedance;
Alpha Rhythm
- MeSH:
Alpha Rhythm;
Electric Impedance;
Electrodes*;
Electroencephalography*;
Head;
Platinum*
- From:Journal of Korean Medical Science
2018;33(21):e154-
- CountryRepublic of Korea
- Language:English
-
Abstract:
BACKGROUND: One of the key issues in electroencephalogram (EEG) monitoring is accurate signal acquisition with less cumbersome electrodes. In this study, the L2 phase electro-deposited nanoporous platinum (L2-ePt) electrode is introduced, which is a new type of electrode that utilizes a stable nanoporous platinum surface to reduce the skin-electrode impedance. METHODS: L2-ePt electrodes were fabricated using electro-deposition technique. Then, the effect of the nanoporous surface on the surface roughness and the electrode impedance were observed from the L2-ePt electrodes and the flat platinum (FlatPt) electrode. The skin-electrode impedances of the L2-ePt electrodes, a gold cup electrode, and the FlatPt electrode were evaluated when placed on the hairy occipital area of the head in ten subjects. For the validation of using the L2-ePt electrode, a correlational analysis of the alpha rhythms was performed in the same subjects for simultaneous EEG recordings using the L2-ePt and clinically-used EEG electrodes. RESULTS: The results indicated that the L2-ePt electrode with a roughness factor of 200 had the lowest mean impedance performance. Moreover, the proposed L2-ePt electrode showed a significantly lower mean skin-electrode impedance than the FlatPt electrode. Finally, the EEG signal quality recorded by the L2-ePt electrode (r = 0.94) was comparable to that of the clinically-used gold cup electrode. CONCLUSION: Based on these results, the proposed L2-ePt electrode is suitable for use in various high-quality EEG applications.
