Plasmonics Yields Surprisingly Efficient Electron Transport Via Assembly of Shell-Insulated Au Nanoparticles
40 Pages Posted: 13 Jun 2018 Sneak Peek Status: PublishedMore...
Junctions built from metallic nanoparticles can circumvent the diffraction limit and marry molecular-/nano-electronics with plasmonics. However, experimental advances in plasmon-assisted electron transport at the nanoscale have been limited. We construct junctions of a robust, molecule-free, suspended film, built solely from AuNPs, capped by SiO2 shells (Au@SiO2), which give insulating tunneling gaps up to 3.6 nm between the NPs. Current measured across monolayers of such AuNPs shows ultra-long-range, plasmon-enabled electron transport (P-transport), beyond the range of normal electron tunneling across insulators. The finding challenges present understanding of electron transport in such systems and opens possibilities for future combinations of plasmonics and nanoelectronics.
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