Gold nanoparticles coated polystyrene/reduced graphite oxide microspheres with improved dispersibility and electrical conductivity for dopamine detection

- A novel strategy to improve the sensitivity of graphene polymer composite sensors was proposed.
- Gold nanoparticles coated PS/reduced graphite oxide (AuNPs@PS/RGO) microspheres were facilely prepared.
- AuNPs@PS/RGO microspheres offered a nanomole level detection limit for DA with excellent sensitive and selective.
- AuNPs@PS/RGO microspheres dispersed more homogeneously and stably in water comparing with graphene sheets and PS/graphene microspheres.