Abstract
Theoretically, degradable bio-polysaccharide materials are good proton conductors with the potential of being used as gate dielectrics for electric-double-layer (EDL) transistors due to the abundant hydrophilic functional groups contained. In this work, xanthan gum-gated flexible EDL thin-film transistors (TFTs) were fabricated with the bio-polysaccharide material xanthan gum as the gate dielectric. The xanthan gum film prepared by solution method obtains a high specific capacitance of 2 μF/cm2 at 1 Hz, based on which the low-voltage xanthan-gated EDL TFTs exhibit good electrical properties, such as an ON/OFF ratio > 105, a carrier mobility of 14 cm2V−1s−1 along with excellent mechanical flexibility and bending stability. Furthermore, a resistor-loaded inverter based on this flexible EDL TFT has not only demonstrated excellent performance required by inverters but also realized the functions of filtering, noise reduction, and amplitude discrimination. Based on the results achieved, the xanthan gum-gated flexible EDL TFTs fabricated in this work can provide an option for the preparation of implantable & wearable smart devices.
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