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We developed a novel carbon black (CB) ink and tailored it for compatibility with the small cartridge nozzles (17x17 µm) of inkjet printers. With this ink, we printed a precise pattern on a dielectric elastomer membrane (VHB). By combining a dielectric elastomer actuator (DEA) next to the printed CB pattern, its resistance could be significantly changed (> 3 orders of magnitude) accompanied with actuation and non-actuation of the DEA. Thanks to its excellent piezoresistive performance, we have successfully applied this dielectric elastomer-based device as a “switch” for controlling soft grippers and as a multiplexer for signal processing.
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Jianan Yi, Katherine E. Wilson, Iain A. Anderson, Andreas Richter, Ernst-Friedrich Markus Henke, "Soft and stretchable piezoresistive devices fabricated with inkjet-printed carbon black," Proc. SPIE PC12945, Electroactive Polymer Actuators and Devices (EAPAD) XXVI, PC129450D (10 May 2024); https://doi.org/10.1117/12.3009893