Colorimetric detection of benzoyl peroxide based on the etching of silver nanoshells of Au@Ag nanorods

A fast, sensitive and high-resolution colorimetric method for sensing benzoyl peroxide (BPO) was proposed by using orange sheath-like [email protected] nanorods (NRs) as the signal transducer. BPO can oxidize Ag nanoshells on the surface of [email protected] NRs; the etching of Ag nanoshells changes the aspect ratio of Au nanostructures and causes a red-shift of longitudinal local surface Plasmon resonance (LSPR) peak, resulting in a...