fig6

Figure 6. Flexible dry and semi-dry electrodes: (A) Silver-coated polymer conductive bristles dry electrode instead. Reproduced with permission^[81]. Copyright 2011, the Authors. Published by IOP Publishing. (B) Schematic diagram of assembled screen-printed flexible Ag/AgCl electrode array. Reproduced with permission^[83]. Copyright 2020, the Authors. Published by IOP Publishing. (C) Photo and schematic diagram of a single semi-dry electrode including porous ceramic pillars (a), a built-in reservoir (b), 3.5% saline solution (c), and sintered Ag/AgCl electrode (d). Reproduced with permission^[86]. Copyright 2016, Elsevier. (D) Hollow cylinder electrode consisting of a PVC shell, infiltrated normal saline, and an AgPMS contact and assembled EEG electrode. Reproduced under the terms of an ACS AuthorChoice License^[78]. Copyright 2019, Copyright American Chemical Society. (E) Diagram illustrating a semi-dry electrode that expels the hydrating agent. Manufactured polyurethane electrodes. Reproduced with permission^[77]. Copyright 2013, Elsevier. EEG: electroencephalography.