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Depiction of the fabrication of Wab/PEG-SiNWFET (sample 3) and Fab/PEG-SiNWFET (sample 4) immunosensors in this study. (A) The SiNW channels (light blue bar) were modified with PEG-mSAMs (silane-PEG-NH2: black long zigzag shapes, silane-PEG-OH: grey long zigzag shapes) and (B) GA (green zigzag shapes) before (C) either the Wab (bronze Y shapes in sample 3) or the Fab (yellow-bronze bars in sample 4) were immobilized.
