Electrowetting on flexible, transparent and conducting single-layer graphene

This paper reports the results of using graphene as a novel electrode material in the experiment of electrowetting on dielectric (EWOD). The device has a Teflon layer coated CVD graphene electrode which is patterned on transparent and flexible substrates such as PET films. By applying a potential difference between a liquid droplet and a graphene electrode, we observed a change in contact angle from 117° to 86° as the voltage is increased from 0V to 40V. We also demonstrated reversible electrowetting. By utilizing graphene as an electrode material we have achieved high breakdown voltage, transparency and flexibility, all of which will be beneficial for future applications such as flexible display technology and cell manipulation.