Recent advances in homogenous immunoassays based on resonance energy transfer

•Immunoassays based on resonance energy transfer enable selective one-step analyte detection.•Engineered antibodies are increasingly used in homogenous immunoassays.•Quantum dots and other nanomaterials are becoming popular as energy acceptors.•Multiplexing and miniaturization are current development trends of homogenous immunoassays.•Technical advances in homogenous immunoassays open ways for point-of-care and food safety applications.