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Flexible UV-Ozone-Modified Carbon Nanotube Electrodes for Neuronal Recording



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Carbon nanotubes were grown on flexible polyimide substrates at temperatures below 400 °C as electrodes for extracellularly neuronal recording. The electrical charge-transfer and electrochemical properties of such CNT electrodes were enhanced by UV-ozone exposure, which induced the formation of C[BOND]O, C[DOUBLE BOND]O, and O[BOND]C[DOUBLE BOND]O bonds and reduced the CNT/electrolyte interfacial impedance while increasing the interfacial capacitance.