Charge transport in networks of nanoparticles linked by molecular spacers is investigated. Remarkably, in the regime where cotunneling dominates, the molecular signature of a device is strongly enhanced. We demonstrate that the resistance ratio of identical networks with different molecular spacers increases dramatically, from an initial value of 50 up to 105, upon entering the cotunneling regime. Our work shows that intrinsic molecular properties can be amplified through nanoscale engineering.
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