Development of a High-Sensitive Immunosensor Based on Monitoring Redox Signal of Gold Nanoparticle

A high-sensitive immunosensor was developed monitoring the redox signals of Au nanoparticles in connection with disposable screen-printed carbon strips (SPCSs). All the procedures could be performed on only one strip in a volume of 2 μL solution. Additionally, the direct observation of the Au nanoparticle-labeled antigen-antibody complex on the electrode surface was performed by SEM imaging.The changes in the structure of Au nanoparticles during...