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Proceedings Paper

Improved charging rates by laser perforating polypyrrole electrodes: towards use as in vivo microelectronic and micromechanical devices (Conference Presentation)
Author(s): Yuta Dobashi; Kenneth Lee; John Madden; Victor Yang

Paper Abstract

Conducting polymer are a promising class of biomaterials owing to their mechanical compliance and energy density. However, slow electrochemical processes have hindered widespread application. In this work, we make microscopic arrays of fs/ps laser patterned holes in relatively thick, easy to handle conducting polymer films in order to reduce charging time. A single-step, top-down, non-contact and template-free approach is used, employing femto and picosecond lasers to texturize polypyrrole films while preserving the total capacitance. A wide range of hole separations and diameters (pitch/diameter from 9.75/5.17 μm to 24.7/13.2 μm) are explored to reduce the diffusion path length in the bulk polymer, which achieved a speed increase of between 2 and 30 times. Fast charging conducting polymer electrodes such as ones achieved in this work may be useful in creating highly efficient (extremely low impedance and high fidelity) implantable electrodes for neural monitoring/stimulating app

Paper Details

Date Published: 9 March 2020
Proc. SPIE 11225, Clinical and Translational Neurophotonics 2020, 112250F (9 March 2020); doi: 10.1117/12.2546520
Show Author Affiliations
Yuta Dobashi, Univ. of Toronto (Canada)
Kenneth Lee, Univ. of Toronto (Canada)
John Madden, The Univ. of British Columbia (Canada)
Victor Yang, Univ. of Toronto (Canada)

Published in SPIE Proceedings Vol. 11225:
Clinical and Translational Neurophotonics 2020
Steen J. Madsen; Victor X. D. Yang; Nitish V. Thakor, Editor(s)

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