Effect the functional charge on the conductance poly-silicon nanowire

In this paper investigated into the effect of a bio-interface charge field effect biosensor on the conductance of the nanowire through finite element calculations. The biosensor under thought consisted of a poly-silicon nanowire of radius 100 nm surrounded by a 120 nm oxide layer, and the oxide layer was surrounded by a 160 nm thick functional bio-interface layer. This whole system was immerged in an electrode was 500 nm and every one of the layers was treated as a range medium characterized by the corresponding dielectric constant. First, the distribution of the electrostatic potential in the nanowire due to the surface charge was computed using Poisson equation with Boltzmann statistics. Then, the conductance of the nanowire was affected with interaction with functional layer.