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A novel fluorescence immunoassay has been developed for alpha-fetoprotein (AFP) detection based on copper ions (Cu2+) regulated formation of quantum dots in situ. In place of traditionally used fluorophore or enzyme for signal amplification, CuO nanoparticles (NPs) were used as signal amplifier to enhance the detection sensitivity. In the presence of AFP, CuO NPs-labeled antibody can be specifically...
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