Bioelectrochemical Properties of the ZnO Nanorods Modified by Au Nanoparticles

A novel amperometric glucose biosensor based on hybrid nanostructure of ZnO nanorods and Au nanoparticles was investigated, and the morphologies of various self-assembly time of AuNP by self-assembly method on the ZnONR were discussed. The ZnO nanorods (ZnONR) provide a 1-D electron transmission path and the Au nanoparticle (AuNP) was used to enhance the sensitivity. Furthermore, the ZnONR arrays were fabricated by chemical bath deposition which was an aqueous deposition technique on ITO electrode. For the bioelectrochemical properties of glucose sensing, the linear range of the ZnO-Au hybrid nanostructure is 1.38~22.22 mM with sensitivity of 1.44 μA/mM and the limit of detection (LOD) is 3.51M.