AFP and liver cancer: Yu et al. employed a self‐powered electrochromic display with an Al/PB detection cell for POC‐related immunosensing of alpha‐fetoprotein (AFP, a biomarker for liver cancer) (Figure 8d).[116] They initially performed a sandwich‐type immunoreaction with AFP in an anti‐AFP monoclonal antibody (mAb1)‐coated polystyrene microtiter plate using GOx and anti‐AFP polyclonal antibody‐labelled AuNPs (GOx‐AuNP‐pAb2) as the detection antibody.