Homogeneous immunoassays based on fluorescence emission intensity variations of zinc selenide quantum dot sensors

► Novel homogeneous immunoassays enable rapid quantitative detection of protein targets. ► Sensors consist of fluorescent zinc selenide quantum dots conjugated to probe biomolecules. ► Binding of sensors to target proteins results in fluorescence emission intensity amplification. ► Detection of protein targets in PBS buffer solution and diluted human serum is demonstrated.