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. 2017 Feb 6;8:372–380. doi: 10.3762/bjnano.8.39

Figure 5.

Figure 5

Absorption spectra before and after probing the varying concentrations of human IgG by the functionalized GNR biochip using (A) Traut’s reagent, (B) DTT, (C) PEG6-CONHNH2, and (D) SH-PEG-NH2 combined with EDC reaction to introduce thiol groups to anti-IgG.