Fig. 4
From: Emergence of winner-takes-all connectivity paths in random nanowire networks
Direct visualization of winner-takes-all (WTA) conduction in random nanowire networks (NWNs). a Scanning electron microscopy image of an unperturbed Ag NWN of dimensions 100 × 100 μm. b–d Passive voltage contrast images of the same network taken during I–V sweeps with limiting current compliances of b 50 nA, c 500 nA, and d 50 μA. Note it is not possible to directly compare the contrast observed in different networks or even that observed in the same network imaged under different conditions. Current levels are written on the respective panels. White scale bars correspond to 2 μm. The respective conductance values measured from the I–V curves are b \({\it \Gamma} _{{\mathrm{nt}}} = 1.1 \times 10^{ - 7}{\mathrm{S}}\), c \({\it \Gamma} _{{\mathrm{nt}}} = 1.0 \times 10^{ - 6}\,{\mathrm{S}}\), and d \({\it \Gamma} _{{\mathrm{nt}}} = 9.6 \times 10^{ - 6}\,{\mathrm{S}}\)
