7 documents found, page 1 of 1
The Arch Electrode: A Novel Dry Electrode Concept for Improved Wearing Comfort
Vasconcelos, Beatriz; Fiedler, Patrique; Machts, René; Haueisen, Jens; Fonseca, CarlosElectroencephalography (EEG) is increasingly used for repetitive and prolonged applications like neurofeedback, brain computer interfacing, and long-term intermittent monitoring. Dry-contact electrodes enable rapid self-application. A common drawback of existing dry electrodes is the limited wearing comfort during prolonged application. We propose a novel dry Arch electrode. Five semi-circular arches are arrang...
Me-Doped Ti–Me intermetallic thin films used for dry biopotential electrodes: a...
Lopes, Cláudia Jesus Ribeiro; Fiedler, Patrique; Rodrigues, Marco S.; Borges, Joel; Bertollo, Maurizio; Alves, Eduardo; Barradas, Nuno PessoaIn a new era for digital health, dry electrodes for biopotential measurement enable the monitoring of essential vital functions outside of specialized healthcare centers. In this paper, a new type of nanostructured titanium-based thin film is proposed, revealing improved biopotential sensing performance and overcoming several of the limitations of conventional gel-based electrodes such as reusability, durabilit...
Dry electrodes for surface electromyography based on architectured titanium thi...
Rodrigues, Marco S.; Fiedler, Patrique; Küchler, Nora; Domingues, Rui P.; Lopes, Cláudia; Borges, Joel; Haueisen, Jens; Vaz, F.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’s reuse and is often linked to skin irritation episodes. To overcome these drawbacks, a new type of dry electrodes based on arc...
Contact Pressure and Flexibility of Multipin Dry EEG Electrodes
Fiedler, Patrique; Muehle, Richard; Griebel, Stefan; Pedrosa, Paulo Eduardo Teixeira Baptista; Fonseca, Carlos; Vaz, F.; Zanow, Frank; Haueisen, JensIn state-of-the-art electroencephalography (EEG) Silver/Silver-Chloride electrodes are applied together with electrolyte gels or pastes. Their application requires extensive preparation, trained medical staff and limits measurement time and mobility. We recently proposed a novel multichannel cap system for dry EEG electrodes for mobile and out-of-the-lab EEG acquisition. During the tests with these novel polyme...
In-service characterization of a polymer wick-based quasi-dry electrode for rap...
Pedrosa, Paulo Eduardo Teixeira Baptista; Fiedler, Patrique; Pestana, Vanessa; Vasconcelos, Beatriz; Gaspar, Hugo; Amaral, Maria H.; Freitas, DiamantinoA novel quasi-dry electrode prototype, based on a polymer wick structure filled with a specially designed hydrating solution is proposed for electroencephalography (EEG) applications. The new electrode does not require the use of a conventional electrolyte paste to achieve a wet, low-impedance scalp contact. When compared to standard commercial Ag/AgCl sensors, the proposed wick electrodes exhibit similar elect...
Ag:TiN-Coated Polyurethane for Dry Biopotential Electrodes: From Polymer Plasma...
Pedrosa, Paulo; Fiedler, Patrique; Lopes, Cláudia; Alves, Eduardo; Barradas, Nuno P.; Haueisen, Jens; Machado, A. V.; Fonseca, Carlos; Vaz, F.Several plasma treatments using argon, oxygen, and nitrogen are studied in order to increase the interfacial adhesion of the polyurethane/Ag:TiN system to be used as biopotential electrodes. The optimized plasma treatments conditions (100 W, 15 min, regardless of the gas) promote a steep decrease of the water contact angle values. The observed chemical and topographic alterations translate into excellent polyur...
Electrochemical characterization of nanostructured Ag:TiN thin films produced b...
Pedrosa, Paulo; Machado, Diogo; Fiedler, Patrique; Vasconcelos, Beatriz; Alves, Eduardo; Barradas, Nuno P.; Martin, Nicolas; Haueisen, Jens; Vaz, F.Flexible polyurethane substrates were coated with Ag:TiN thin films (N/Ti atomic ratio = 0.7; 10 at.% Ag), with different column inclinations (α = 0°, 40° and 80°) and architectures (columnar, zigzag with 2 and 4 periods), using the Glancing Angle Deposition (GLAD) technique. The coatings were characterized in order to assess the best thin film architecture to suit the bio-potential electrode applications. An a...