Fig. 5From: Enhanced Plasmonic Biosensors of Hybrid Gold Nanoparticle-Graphene Oxide-Based Label-Free ImmunoassayAnalysis of UV-vis absorption spectra for AuNP with antiBSA interaction response. a SP absorption spectra of AuNPs, b GO-bound BSA, c AuNP-anti-BSA probe, and d Calibration curves for AuNP with antiBSA interaction response at dilution different concentrations of antiBSA protein from 1.45 nM~145 fMBack to article page