CuO nanorod-decorated hemin-graphene with enhanced peroxidase-mimicking performance for the colorimetric and electrochemical determination of 4-aminophenol with a smartphone

A facile dual-mode sensor based on CuO nanorod-decorated hemin-graphene was constructed for the detection of 4-aminophenol (4-AP). In addition, a smartphone-based assay was developed, which opened a new path for the on-site detection of 4-AP.