Fig. 4From: Sensitive and Selective Detection of HIV-1 RRE RNA Using Vertical Silicon Nanowire Electrode ArraySchematic illustration of principle of immunosensor using VSNEA. As peptides and RNAs are attached to the surface of Au-coated NWs, current path is blocked reducing Fe(CN)6 3-/4- redox reaction. The peptides were modified in order to be functionalized on the VSNEA (the sequence is shown in inset)Back to article page