Figure 4

Top view and cross-sectional SEM images of the fabricated coplanar-gate nanowire FEAs. (a) Top view SEM image of the of gated FEA structures; (b) individually addressable FEA; (c) ZnO nanowire morphologies in the ZnO nanowire pad; (d) cross-sectional SEM image of the ZnO nanowire pad in an individually addressable FEA.