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The production of large area interfaces and the use of scalable methods tobuild-up designed nanostructures generating advanced functional properties areof high interest for many materials science applications. Nevertheless, largearea coverage remains a major problem for pristine graphene and here we presenta hybrid, composite graphene-like material soluble in water, which can beexploited in many areas, such as energy storage, electrodes fabrication,selective membranes and biosensing. Graphene oxide (GO) was produced by thetraditional Hummers method being further reduced in the presence ofpoly(styrene sulfonate) sodium salt (PSS), thus creating stable reducedgraphene oxide (rGO) nanoplateles wrapped by PSS (GPSS). Molecular dynamicssimulations were carried out of further clarify the interactions between PSSmolecules and rGO nanoplatelets, with calculations supported by FTIR analysis.The intermolecular forces between rGO nanoplatelets and PSS lead to theformation of a hybrid material (GPSS) stabilized by van der Waals forces,allowing the fabrication of high quality layer-by-layer (LbL) films withpolyalillamine hydrochloride (PAH). Raman and electrical characterizationscorroborated the successful modifications in the electronic structures from GOto GPSS after the chemical treatment, resulting in (PAH/GPSS) LbL films fourorders of magnitude more conductive than (PAH/GO).

Synthesis, characterization and computational simulation of graphene nanoplatelets stabilized in poly(styrene sulfonate) sodium salt