Research Article
A Sensitive Fluorescent Immunoassay for Prostate Specific Antigen Detection Based on Signal Amplify Strategy of Horseradish Peroxidase and Silicon Dioxide Nanospheres
Figure 5
(a) Fluorescence spectra of immunoassays with a target PSA concentration of 0.03, 0.05, 0.1, 0.5, 1, 5, 10, 50, 100 ng·mL−1 from the bottom spectrum to the top spectrum. (b) The calibration plot of relative fluorescence intensity (ΔFI) vs. the logarithm of PSA concentration (error bars represent standard deviations from three repeated measurements).
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