Controlled synthesis of spinel ZnFe_2O_4 decorated ZnO heterostructures as peroxidase mimetics for enhanced colorimetric biosensing

摘要

Controlled synthesis of spinel ZnFe_2O_4 nanoparticle-decorated ZnO nanofiber heterostructures was carried out with regularly varied particle sizes and uniform distribution. The obtained heterostructures possessed enhanced intrinsic peroxidase-like activity, and the activities regularly changed as the sizes of ZnFe_2O_4 nanoparticles varied. The heterostructures were further applied in sensitive colorimetric biosensing of urine glucose.