Advances in low-invasive electrodes for bioelectric signals monitoring in peripheral sympathetic nerves in chronic conditions rely on electrode materials that show low-impedance ionic/electronic interfaces and elastic mechanical properties compliant with the soft and fragile nerve strands. Here we report a highly stretchable low-impedance electrode realized by microcracked gold films as metallic conductors covered with stretchable conducting polymer composite to facilitate ion-to-electron exchange. The conducting polymer composite based on poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) obtains its adhesive, low-impedance properties by controlling thickness, plasticizer content and deposition conditions. Atomic Force Microscopy measurements were used to characterize the semiconducting polymer surface mechanical and electrical properties. Morphology studies under strain show that the optimized conducting polymer coating is compliant with the micro-crack mechanics of the underlying Au-layer, necessary to absorb the tensile deformation when the electrodes are stretched. We demonstrate functionality of the stretchable electrodes by performing high quality recordings of renal sympathetic nerve activity under chronic conditions in rats.

Francesco Decataldo, T. (2019). Stretchable and Low-Impedance Electrode Polymer Coatings for Peripheral Nerves Recording.

Stretchable and Low-Impedance Electrode Polymer Coatings for Peripheral Nerves Recording

Francesco Decataldo
Primo
;
Davide Martelli;Isacco Gualandi;Marta Tessarolo;Erika Scavetta;Roberto Amici;Beatrice Fraboni
2019

Abstract

Advances in low-invasive electrodes for bioelectric signals monitoring in peripheral sympathetic nerves in chronic conditions rely on electrode materials that show low-impedance ionic/electronic interfaces and elastic mechanical properties compliant with the soft and fragile nerve strands. Here we report a highly stretchable low-impedance electrode realized by microcracked gold films as metallic conductors covered with stretchable conducting polymer composite to facilitate ion-to-electron exchange. The conducting polymer composite based on poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) obtains its adhesive, low-impedance properties by controlling thickness, plasticizer content and deposition conditions. Atomic Force Microscopy measurements were used to characterize the semiconducting polymer surface mechanical and electrical properties. Morphology studies under strain show that the optimized conducting polymer coating is compliant with the micro-crack mechanics of the underlying Au-layer, necessary to absorb the tensile deformation when the electrodes are stretched. We demonstrate functionality of the stretchable electrodes by performing high quality recordings of renal sympathetic nerve activity under chronic conditions in rats.
2019
Stretchable and Low-Impedance Electrode Polymer Coatings for Peripheral Nerves Recording
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Francesco Decataldo, T. (2019). Stretchable and Low-Impedance Electrode Polymer Coatings for Peripheral Nerves Recording.
Francesco Decataldo, Tobias.Cramer, Davide Martelli, Isacco Gualandi, Willian S. Korim, Song T. Yao, Marta Tessarolo, Mauro Murgia, Erika Scavetta, Ro...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/801647
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