Fig. 1. Nanowire-based detection of single viruses. (Left) Schematic shows
two nanowire devices, 1 and 2, where the nanowires are modified with
different antibody receptors. Specific binding of a single virus to the receptors
on nanowire 2 produces a conductance change (Right) characteristic of the
surface charge of the virus only in nanowire 2. When the virus unbinds from
the surface the conductance returns to the baseline value.