Hydrogen peroxide LSPR sensing with unoxidised CuNPs-Tween® 60

Copper nanoparticles (CuNPs) as well as those of other noble metals show unique features that are not observed in bulk copper. Despite the enormous potential of CuNPs, their use is limited by their susceptibility to oxidation during and after synthesis. Here, an innovative method based on wet synthesis protocol was developed to produce an aqueous colloidal solution of CuNPs capped with Tween (R) 60 (Polyoxyethylene sorbitan monostearate) capable of being stable and non-oxidised for several months. The CuNPs colloidal solution was tested for the detection of hydrogen peroxide (H2O2) showing a detection limit of 10(-11) M. This result may provide the basis for the design of a rapid, practical, and easy-to-use colorimetric sensor to detect H2O2 in the future. [GRAPHICS]

Automated summary

This study developed an innovative wet synthesis method to produce a stable and non-oxidized colloidal solution of copper nanoparticles, which showed potential for detecting hydrogen peroxide.