Fig. 5

The performance of dual-modular immunosensor. A Plotting of ∆λ versus 4-CPA concentrations. B Plotting of UV–Vis spectral scans. C Photographs of the immunosensor at different concentrations of 4-CPA (0–25 ng mL−1)
The performance of dual-modular immunosensor. A Plotting of ∆λ versus 4-CPA concentrations. B Plotting of UV–Vis spectral scans. C Photographs of the immunosensor at different concentrations of 4-CPA (0–25 ng mL−1)