Self-assembled high aspect ratio gold nanostar/graphene oxide hybrid nanorolls

Owing to their unique properties and potential applications in nanoelectronics, graphene and its derivatives have received extensive attention over the last decade. Noble metal nanostructures, on the other hand, enable the confinement and manipulation of light at the nanoscale. Integration of nanocarbons and plasmonic nanostructures is expected to result in synergistic optoelectronic properties that can potentially revolutionize the design and fabrication of optoelectronic devices. In this letter, we demonstrate a simple self-assembly approach to achieve synergistic ensemble of plasmonic gold nanostars and graphene oxide. Gold nanostars are directly nucleated and grown on the surface of graphene oxide by in situ reduction method producing differential surface charged hybrid macroanionic sheets, which are then kinetically rolled and simultaneously assembled into high aspect ratio hybrid nanorolls by means of the interplay of kinetics and graphene-gold interactions.