 This was seen as indicating a possible route to an eventual treatment for causes of blindness.In 2007 intrinsic peroxidase-like activity of ferromagnetic nanoparticles was reported as suggesting a wide range of applications in, for example, medicine and environmental chemistry, and the authors reported an immunoassay based on this property.Hui Wei and Erkang Wang then (2008) used this mimetic property of easily-prepared magnetic nanoparticles (MNP) to demonstrate analytical applications to bioactive molecules, describing a colorimetric assay for hydrogen peroxide () and a sensitive and selective platform for glucose detection.