Journal
NATURE COMMUNICATIONS
Volume 8, Issue -, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/ncomms14880
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Funding
- Marie Curie fellowships of the European Commission
- EPSRC Reactive Plasmonics project [EP/M013812/1]
- Office of Naval Research
- Royal Society
- Lee-Lucas Chair in Physics
- NG NEXT
- UDE
- CENIDE
- NSFC [51601098]
- Goldwater Scholarship
- Marshall Scholarship
- EPSRC [EP/M013812/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/M013812/1] Funding Source: researchfish
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Nanoscale localization of electromagnetic fields near metallic nanostructures underpins the fundamentals and applications of plasmonics. The unavoidable energy loss from plasmon decay, initially seen as a detriment, has now expanded the scope of plasmonic applications to exploit the generated hot carriers. However, quantitative understanding of the spatial localization of these hot carriers, akin to electromagnetic near-field maps, has been elusive. Here we spatially map hot-electron-driven reduction chemistry with 15nm resolution as a function of time and electromagnetic field polarization for different plasmonic nanostructures. We combine experiments employing a six-electron photo-recycling process that modify the terminal group of a self-assembled monolayer on plasmonic silver nanoantennas, with theoretical predictions from first-principles calculations of non-equilibrium hot-carrier transport in these systems. The resulting localization of reactive regions, determined by hot-carrier transport from high-field regions, paves the way for improving efficiency in hot-carrier extraction science and nanoscale regio-selective surface chemistry.
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