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Light-Directed Tuning of Plasmon Resonances via Plasmon-Induced Polymerization Using Hot Electrons.

ABSTRACT: The precise morphology of nanoscale gaps between noble-metal nanostructures controls their resonant wavelengths. Here we show photocatalytic plasmon-induced polymerization can locally enlarge the gap size and tune the plasmon resonances. We demonstrate light-directed programmable tuning of plasmons can be self-limiting. Selective control of polymer growth around individual plasmonic nanoparticles is achieved, with simultaneous real-time monitoring of the polymerization process in situ using dark-field spectroscopy. Even without initiators present, we show light-triggered chain growth of various monomers, implying plasmon initiation of free radicals via hot-electron transfer to monomers at the Au surface. This concept not only provides a programmable way to fine-tune plasmons for many applications but also provides a window on polymer chemistry at the sub-nanoscale.

SUBMITTER: Ding T

PROVIDER: S-EPMC5485798 | biostudies-literature | 2017 Jun

REPOSITORIES: biostudies-literature

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Light-Directed Tuning of Plasmon Resonances via Plasmon-Induced Polymerization Using Hot Electrons.

Ding Tao T Mertens Jan J Lombardi Anna A Scherman Oren A OA Baumberg Jeremy J JJ

ACS photonics 20170425 6

The precise morphology of nanoscale gaps between noble-metal nanostructures controls their resonant wavelengths. Here we show photocatalytic plasmon-induced polymerization can locally enlarge the gap size and tune the plasmon resonances. We demonstrate light-directed programmable tuning of plasmons can be self-limiting. Selective control of polymer growth around individual plasmonic nanoparticles is achieved, with simultaneous real-time monitoring of the polymerization process in situ using dark ...[more]

PMID: 28670601

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