Gold nanoparticles coated zinc oxide nanorods as the matrix for enhanced l-lactate sensing

- Au nanoparticles were coated on ZnO nanorods via electrostatic self-assembly.
- The electro-catalytic properties of electrode were enhanced by Au nanoparticles.
- Au/ZnO based biosensor exhibited improved sensing performance for l-lactate.
- The electrode with Au modification displays better affinity of LOx to l-lactate.
- The present method can be used for detecting other biological and chemical species.