Nanozyme–Enzyme Cascade Reaction-Enhanced Ratiometric Fluorescence Immunosensing Platform for Sensitive and Accurate Detection of Ractopamine

, which was nearly 5.5 times more sensitive than traditional colorimetric ELISA. This RF sensing platform based on robust nanozyme-triggered enzymatic cascade signal amplification and excellent RF signal readout has offered a powerful and universal platform for RAC and other trace target detection.