New dry electrodes based on iridium oxide (IrO) for non-invasive biopotential recordings and stimulation
Autor(a) principal: | |
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Data de Publicação: | 2010 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/1822/11986 |
Resumo: | This paper presents a new type of dry electrodes for acquisition of biopotentials and stimulation. These dry electrodes are composed by 16 microtip structures (by forming an array of 4×4 microtips), which were fabricated through bulk micromachining of a 100 -type silicon substrate in a potassium hydroxide (KOH) solution. The fabrication process was trimmed in a way that each microtip presents solid angles of 54.7◦, a width in the range 150–200 m, a height of 100–200 m, and an inter-microtip spacing of 2mm. The electrodes have a thin layer (obtained by reactive DC-sputtering) of iridium oxide (IrO) to improve the contact with the skin. These dry electrodes penetrate the outer skin layer (i.e. stratum corneum that is 10 mthick) to allow a direct contact with the electrolyte fluids of the inner skin layers. Thenewelectrode avoid the use of conductive gels and reduce the skin preparation time in EEG experiments, whichmaytake about 45 min for a set of 32 standard silver/silver chloride (Ag/AgCl) electrodes. The electrode–electrolyte impedance spectrometry (IS) of the IrO thin-films was performed in a saline solution, 0.9% concentration by weight, to mimic the electrode–tissue interface. The IS measured results for the IrO coatings were comparable to the results observed for the standard Ag/AgCl electrodes. The new dry microtips array constitutes an inexpensive, low resistance and mechanically robust alternative electrode for non-invasive biopotential recording/stimulation with fast application on skin. |
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New dry electrodes based on iridium oxide (IrO) for non-invasive biopotential recordings and stimulationBiopotential acquisitionStimulationDry electrodeMicrotips array electrodeIridium oxide (IrO) electrodeMicromachiningSputteringThin-filmsScience & TechnologyThis paper presents a new type of dry electrodes for acquisition of biopotentials and stimulation. These dry electrodes are composed by 16 microtip structures (by forming an array of 4×4 microtips), which were fabricated through bulk micromachining of a 100 -type silicon substrate in a potassium hydroxide (KOH) solution. The fabrication process was trimmed in a way that each microtip presents solid angles of 54.7◦, a width in the range 150–200 m, a height of 100–200 m, and an inter-microtip spacing of 2mm. The electrodes have a thin layer (obtained by reactive DC-sputtering) of iridium oxide (IrO) to improve the contact with the skin. These dry electrodes penetrate the outer skin layer (i.e. stratum corneum that is 10 mthick) to allow a direct contact with the electrolyte fluids of the inner skin layers. Thenewelectrode avoid the use of conductive gels and reduce the skin preparation time in EEG experiments, whichmaytake about 45 min for a set of 32 standard silver/silver chloride (Ag/AgCl) electrodes. The electrode–electrolyte impedance spectrometry (IS) of the IrO thin-films was performed in a saline solution, 0.9% concentration by weight, to mimic the electrode–tissue interface. The IS measured results for the IrO coatings were comparable to the results observed for the standard Ag/AgCl electrodes. The new dry microtips array constitutes an inexpensive, low resistance and mechanically robust alternative electrode for non-invasive biopotential recording/stimulation with fast application on skin.Fundação para a Ciência e a Tecnologia (FCT) - SFRH/BD/21529/2005ElsevierUniversidade do MinhoDias, N. S.Carmo, João Paulo PereiraSilva, A. F.Mendes, P. M.Correia, J. H.20102010-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/1822/11986eng"Sensors and Actuators A : Physical". ISSN 0924-4247. 164 (2010) 28-34.0924-424710.1016/j.sna.2010.09.016info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-07-21T12:41:46Zoai:repositorium.sdum.uminho.pt:1822/11986Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T19:38:49.387774Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
New dry electrodes based on iridium oxide (IrO) for non-invasive biopotential recordings and stimulation |
title |
New dry electrodes based on iridium oxide (IrO) for non-invasive biopotential recordings and stimulation |
spellingShingle |
New dry electrodes based on iridium oxide (IrO) for non-invasive biopotential recordings and stimulation Dias, N. S. Biopotential acquisition Stimulation Dry electrode Microtips array electrode Iridium oxide (IrO) electrode Micromachining Sputtering Thin-films Science & Technology |
title_short |
New dry electrodes based on iridium oxide (IrO) for non-invasive biopotential recordings and stimulation |
title_full |
New dry electrodes based on iridium oxide (IrO) for non-invasive biopotential recordings and stimulation |
title_fullStr |
New dry electrodes based on iridium oxide (IrO) for non-invasive biopotential recordings and stimulation |
title_full_unstemmed |
New dry electrodes based on iridium oxide (IrO) for non-invasive biopotential recordings and stimulation |
title_sort |
New dry electrodes based on iridium oxide (IrO) for non-invasive biopotential recordings and stimulation |
author |
Dias, N. S. |
author_facet |
Dias, N. S. Carmo, João Paulo Pereira Silva, A. F. Mendes, P. M. Correia, J. H. |
author_role |
author |
author2 |
Carmo, João Paulo Pereira Silva, A. F. Mendes, P. M. Correia, J. H. |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
Universidade do Minho |
dc.contributor.author.fl_str_mv |
Dias, N. S. Carmo, João Paulo Pereira Silva, A. F. Mendes, P. M. Correia, J. H. |
dc.subject.por.fl_str_mv |
Biopotential acquisition Stimulation Dry electrode Microtips array electrode Iridium oxide (IrO) electrode Micromachining Sputtering Thin-films Science & Technology |
topic |
Biopotential acquisition Stimulation Dry electrode Microtips array electrode Iridium oxide (IrO) electrode Micromachining Sputtering Thin-films Science & Technology |
description |
This paper presents a new type of dry electrodes for acquisition of biopotentials and stimulation. These dry electrodes are composed by 16 microtip structures (by forming an array of 4×4 microtips), which were fabricated through bulk micromachining of a 100 -type silicon substrate in a potassium hydroxide (KOH) solution. The fabrication process was trimmed in a way that each microtip presents solid angles of 54.7◦, a width in the range 150–200 m, a height of 100–200 m, and an inter-microtip spacing of 2mm. The electrodes have a thin layer (obtained by reactive DC-sputtering) of iridium oxide (IrO) to improve the contact with the skin. These dry electrodes penetrate the outer skin layer (i.e. stratum corneum that is 10 mthick) to allow a direct contact with the electrolyte fluids of the inner skin layers. Thenewelectrode avoid the use of conductive gels and reduce the skin preparation time in EEG experiments, whichmaytake about 45 min for a set of 32 standard silver/silver chloride (Ag/AgCl) electrodes. The electrode–electrolyte impedance spectrometry (IS) of the IrO thin-films was performed in a saline solution, 0.9% concentration by weight, to mimic the electrode–tissue interface. The IS measured results for the IrO coatings were comparable to the results observed for the standard Ag/AgCl electrodes. The new dry microtips array constitutes an inexpensive, low resistance and mechanically robust alternative electrode for non-invasive biopotential recording/stimulation with fast application on skin. |
publishDate |
2010 |
dc.date.none.fl_str_mv |
2010 2010-01-01T00:00:00Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/1822/11986 |
url |
http://hdl.handle.net/1822/11986 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
"Sensors and Actuators A : Physical". ISSN 0924-4247. 164 (2010) 28-34. 0924-4247 10.1016/j.sna.2010.09.016 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Elsevier |
publisher.none.fl_str_mv |
Elsevier |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
instname_str |
Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
repository.mail.fl_str_mv |
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1799132927523553280 |