Journal
ACS NANO
Volume 11, Issue 10, Pages 10281-10288Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.7b04960
Keywords
plasmonics; photocatalysis; aluminum; nanomaterials; antenna-reactor; electron tomography
Categories
Funding
- National Science Foundation (NSF) [ECCS-1610229]
- Air Force Office of Scientific Research Multidisciplinary Research Program of the University Research Initiative [AFOSR MURI FA9550-15-1-0022]
- Army Research Office [MURI W911NF-12-1-0407]
- Defense Threat Reduction Agency [HDTRA 1-16-1-0042]
- Welch Foundation [C-1220, C-1222]
- American Chemical Society Petroleum Research Fund [56256 DNI5]
- National Science Foundation for a Graduate Research Fellowship [1450681]
- Department of Defense (DoD) through the National Defense Science and Engineering Graduate Fellowship (NDSEG) Program
- Clare College, Cambridge
- European Research Council under the European Union's Seventh Framework Programme (FP7)/ERC [291522-3DIMAGE]
- European Union Seventh Framework Programme [312483-ESTEEM2]
- Directorate For Engineering
- Div Of Electrical, Commun & Cyber Sys [1610229] Funding Source: National Science Foundation
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Recently, aluminum has been established as an earth-abundant alternative to gold and silver for plasmonic applications. Particularly, aluminum nanocrystals have shown to be promising plasmonic photocatalysts, especially when coupled with catalytic metals or oxides into antenna-reactor heterostructures. Here, a simple polyol synthesis is presented as a flexible route to produce aluminum nanocrystals decorated with eight varieties of size-tunable transition-metal nanoparticle islands, many of which have precedence as heterogeneous catalysts. High resolution and three-dimensional structural analysis using scanning transmission electron microscopy and electron tomography shows that abundant nanoparticle island decoration in the catalytically relevant few-nanometer size range can be achieved, with many islands spaced closely to their neighbors. When coupled with the Al nanocrystal plasmonic antenna, these small decorating islands will experience increased light absorption and strong hot-spot generation. This combination makes transition-metal decorated aluminum nanocrystals a promising material platform to develop plasmonic photocatalysis, surface-enhanced spectroscopies, and quantum plasmonics.
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