Abstract
This study reports on the fabrication of biocompatible organic devices by means of inkjet printing with a novel combination of materials. The devices were fabricated on Parylene C (PaC), a biocompatible and flexible polymer substrate. The contact tracks were inkjet-printed using a silver nanoparticle ink, while the active sites were inkjet-printed using a poly (3,4ethylenedioxythiophene)/polystyrene sulfonate (PEDOT:PSS) solution. To insulate the final device, a polyimide ink was used to print a thick film, leaving small open windows upon the active sites. Electrical characterization of the final device revealed conductivities in the order of 103 and 102 S.cm−1 for Ag and PEDOT based inks, respectively. Cell adhesion assays performed with PC-12 cells after 96 h of culture, and B16F10 cells after 24 h of culture, demonstrated that the cells adhered on top of the inks and cell differentiation occurred, which indicates Polyimide and PEDOT:PSS inks are non-toxic to these cells. The results indicate that PaC, along with its surface-treated variants, is a potentially useful material for fabricating cell-based microdevices.
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Acknowledgments
This work was funded by Fundação de Amparo à Pesquisa e Inovação do Estado de Santa Catarina (FAPESC, Brazil) under contract number 9307/2009-3, National Council for Scientific and Technological Development (CNPq/Brazil) and Coordination for the Improvement of Higher Level Personnel (CAPES/Brazil), Finance Code 001. The authors thank the Central Laboratory of Electronic Microscopy (LCME-UFSC).
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Mandelli, J.S., Koepp, J., Hama, A. et al. Cell viability and cytotoxicity of inkjet-printed flexible organic electrodes on parylene C. Biomed Microdevices 23, 2 (2021). https://doi.org/10.1007/s10544-020-00542-z
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DOI: https://doi.org/10.1007/s10544-020-00542-z