Dry electrodes for surface electromyography based on architectured titanium thin films
| Autor: | C. Lopes, Nora Küchler, Joel Nuno Pinto Borges, Marcos Rodrigues, Patrique Fiedler, Filipe Vaz, R. P. Domingues, Jens Haueisen |
|---|---|
| Přispěvatelé: | Universidade do Minho |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
electromyography
Materials science Ciências Naturais::Ciências Físicas 0206 medical engineering Ciências Físicas [Ciências Naturais] 02 engineering and technology Electrolyte lcsh:Technology Reference electrode Article Silver chloride chemistry.chemical_compound Thermoplastic polyurethane Sputtering General Materials Science biopotential electrodes Thin film Composite material dry electrodes lcsh:Microscopy lcsh:QC120-168.85 Science & Technology lcsh:QH201-278.5 magnetron sputtering lcsh:T Sputter deposition 021001 nanoscience & nanotechnology 020601 biomedical engineering chemistry thin films lcsh:TA1-2040 Electrode glancing angle deposition lcsh:Descriptive and experimental mechanics lcsh:Electrical engineering. Electronics. Nuclear engineering lcsh:Engineering (General). Civil engineering (General) 0210 nano-technology lcsh:TK1-9971 |
| Zdroj: | Repositório Científico de Acesso Aberto de Portugal Repositório Científico de Acesso Aberto de Portugal (RCAAP) instacron:RCAAP Materials Volume 13 Issue 9 Materials, Vol 13, Iss 2135, p 2135 (2020) |
| Popis: | Electrodes of silver/silver chloride (Ag/AgCl) are dominant in clinical settings for surface electromyography (sEMG) recordings. These electrodes need a conductive electrolyte gel to ensure proper performance, which dries during long-term measurements inhibiting the immediate electrode&rsquo s reuse and is often linked to skin irritation episodes. To overcome these drawbacks, a new type of dry electrodes based on architectured titanium (Ti) thin films were proposed in this work. The architectured microstructures were zigzags, obtained with different sputtering incidence angles (&alpha ), which have been shown to directly influence the films&rsquo porosity and electrical conductivity. The electrodes were prepared using thermoplastic polyurethane (TPU) and stainless-steel (SS) substrates, and their performance was tested in male volunteers (athletes) by recording electromyography (EMG) signals, preceded by electrode-skin impedance measurements. In general, the results showed that both SS and TPU dry electrodes can be used for sEMG recordings. While SS electrodes almost match the signal quality parameters of reference electrodes of Ag/AgCl, the performance of electrodes based on TPU functionalized with a Ti thin film still requires further improvements. Noteworthy was the clear increase of the signal to noise ratios when the thin films&rsquo microstructure evolved from normal growth towards zigzag microstructures, meaning that further tailoring of the thin film microstructure is a possible route to achieve optimized performances. Finally, the developed dry electrodes are reusable and allow for multiple EMG recordings without being replaced. |
| Databáze: | OpenAIRE |
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