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Ag:TiN‐Coated Polyurethane for Dry Biopotential Electrodes: From Polymer Plasma Interface Activation to the First EEG Measurements
Author(s) -
Pedrosa Paulo,
Fiedler Patrique,
Lopes Cláudia,
Alves Eduardo,
Barradas Nuno P.,
Haueisen Jens,
Machado Ana V.,
Fonseca Carlos,
Vaz Filipe
Publication year - 2016
Publication title -
plasma processes and polymers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.644
H-Index - 74
eISSN - 1612-8869
pISSN - 1612-8850
DOI - 10.1002/ppap.201500063
Subject(s) - tin , electrode , polyurethane , materials science , plasma , analytical chemistry (journal) , adhesion , composite material , argon , polymer , chemistry , metallurgy , chromatography , organic chemistry , physics , quantum mechanics
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 polyurethane/Ag:TiN interfacial adhesion of the plasma treated samples. The in‐service validation of the proposed Ag:TiN‐coated PU multipin electrodes is performed by acquiring EEG signals in parallel with the standard wet Ag/AgCl electrodes. No considerable differences are found in terms of shape, amplitude, and spectral characteristics of the signals when comparing reference wet and dry electrodes.