Preparation of graphene oxide-based surface plasmon resonance biosensor with Au bipyramid nanoparticles as sensitivity enhancer

- A novel SPR biosensor based on graphene oxide and Au bipyramids is proposed.
- The GO sheets function as ideal platform for the immobilization of antibody.
- Au bipyramid nanoparticles are proved to be promising sensitivity enhancer.
- The present biosensor has the highest sensitivity among four types of biosensors.