Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/17788
Título: | Non-invasive iridium oxide biopotential electrodes |
Autor(es): | Dias, N. S. Silva, A. F. Mendes, P. M. Correia, J. H. |
Data: | 2009 |
Editora: | IEEE |
Revista: | IEEE Open Journal of the Industrial Electronics Society |
Resumo(s): | Biopotential recording electrodes have been used to monitor non-invasively electroencephalogram (EEG), electromyogram (EMG) and electrocardiogram (ECG) by means of electrolyte pastes that improve electrode-skin interface. However, the skin preparation of 32 EEG electrodes may take up to 45 min. Despite the low skin-contact impedance and reasonable stability of the standard Ag/AgCl electrodes, several authors have been suggesting iridium oxide (IrO) as a promising biopotential recording and stimulation material. Hence, IrO thin-films were reactively DC-sputtered onto silicon substrates and electrochemically compared to the Ag/AgCl recording electrodes. The IS results observed for the IrO coatings were comparable to the results observed for the standard Ag/AgCl electrodes. The present work introduces a new IrO electrode with microtip structures that penetrate the outer skin layer (i.e. stratum corneum) that is 10 μm thick. The tip structures (100-200 μm high) were micromachined through a wet etching process with undercut in a KOH solution. The proposed dry electrode needs no paste application for signal quality improvement since it is in direct contact with the electrolytic fluids of the inner skin layers. A physiological experiment suggests that the IrO electrodes with microtips perform equally to the standard Ag/AgCl biopotential electrodes. The new dry IrO electrode is suggested to reduce the preparation period before the biopotential acquisition and for surface stimulation of excitable tissues. |
Tipo: | Artigo em ata de conferência |
URI: | https://hdl.handle.net/1822/17788 |
ISBN: | 978-1-4244-4649-0 |
DOI: | 10.1109/IECON.2009.5414851 |
ISSN: | 1553-572X |
Versão da editora: | http://dx.doi.org/10.1109/IECON.2009.5414851 |
Arbitragem científica: | yes |
Acesso: | Acesso restrito UMinho |
Aparece nas coleções: | DEI - Artigos em atas de congressos internacionais |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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Non-invasive iridium oxide biopotential electrodes.pdf Acesso restrito! | 724,23 kB | Adobe PDF | Ver/Abrir |