Controlled self-assembly of graphene oxide on a remote aluminium foil

Graphene oxide (GO) can evaporate'' and then transform into quasi-carbon nanotubes on the aluminium foil surface placed 4 cm above an evaporating aqueous GO dispersion. The resulting self-assembly behavior of GO can be easily tailored by varying evaporation time and/or temperature, providing new approaches for preparing new large-area graphene-based materials.