Stable ink containing highly dispersed graphene nanosheets (GNSs) for inkjet printing on polyimide (PI) film has been successfully prepared by the adsorption of sodium n-dodecyl sulphate (SDS) and adjusting the pH value to 10 by ammonia. Conductive features on a flexible PI film were fabricated by inkjet printing the stable ink directly on a substrate. With higher number of printing cycles, the loading weight of GNS on PI film showed a linear increase up to printing 200 times, when the conductivity reached the saturation value of 6Sm -1 . Sintering the printed GNS at 400°C can effectively lead to the elimination of excess SDS on the GNSs and increase the CC content. The data provided by a four-point probe show that the conductivity of the sintered film can be improved to 121.95Sm -1 . © 2013 Elsevier B.V.
Lee, C. L., Chen, C. H., & Chen, C. W. (2013). Graphene nanosheets as ink particles for inkjet printing on flexible board. Chemical Engineering Journal, 230, 296–302. https://doi.org/10.1016/j.cej.2013.06.093