Quantitative determination of hydrogen peroxide using polymer coated Ag nanoparticles

The quantitative determination of reactive oxygen species (ROS) such as hydrogen peroxide has possibilities for applying to medical and environmental applications. In this study, a localized surface plasmon resonance (LSPR) based quantitative determination of hydrogen peroxide using polyvinylpyrrolidone (PVP) coated silver nanoparticles were described. The silver nanoparticles has ability for reduction of ROS with silver oxidation. Hence, the highly clustered nanoparticles were decomposed with their oxidation. As a result, the LSPR absorption strength will be decreased that depend on (lie ROS concentrations. Using this reaction mechanism between ROS and silver nanoparticles, in this research, quantitative determination of hydrogen peroxide was carried out. As a result, using this LSPR-based ROS detection method, we could achieve to determine the hydrogen peroxide concentrations easily. Hence, PVP-coated silver nanoparticles have great possibilities for applying to several applications such its medical, environmental monitoring and food control. (C) 2008 Elsevier Ltd. All rights reserved.