▎ 摘　　要

In this work, uniform reduced graphene oxide (RGO) films were formed on poly-(ethylene terephthalate) (PET) substrates using a simple drop-casting method. We investigated four types of substrates: unmodified PET, polydopamine-coated PET, carboxyl-group-modified PET, and alkyl-group-modified PET. Upon water evaporation, the surface of the polydopamine-modified PET substrates can interact with the reduced graphene oxide sheets to form flattened and continuous RGO films, which exhibit a sheet resistance of 21.75 k Omega/sq at 82% transmittance. The result indicates that the properties of the surface groups determined whether uniform and flattened RGO films could be formed on the substrates. Hence, we proposed a simple and effective way to produce transparent and conductive films in which the catechol unit exhibits a great effect on the deposition of uniform RGO films on PET substrates. (C) 2014 Published by Elsevier B.V. on behalf of Chinese Society of Particuology and Institute of Process Engineering, Chinese Academy of Sciences.