期刊
NANO LETTERS
卷 20, 期 9, 页码 6644-6650出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.0c02466
关键词
plasnionics; waveguides; nanophotonics; oriented attachment; self-assembly
类别
资金
- Army Research Office [MUM W911NF-12-1 0407]
- Air Force Office of Scientific Research Multidisciplinary Research Program of the University Research Initiative [MUM FA9550-15-1-0022]
- Defense Threat Reduction Agency [HDTRA1-16-1-0042]
- Welch Foundation [C-1220, C-1222]
Plasmonic nanowires (NWs) have generated great interest in their applications in nanophotonics and nanotechnology. Here we report the synthesis of Al nanocrystals (NCs) with controlled morphologies that range from nanospheres to branched NW and NW bundles. This is accomplished by catalyzing the pyrolysis of triisobutyl aluminum (TIBA) with Tebbes reagent, a titanium(III) catalyst with two cyclopentadienyl ligands. The ratio of TIBA to Tebbes reagent is critical in determining the morphology of the resulting Al NC. The branched Al NWs grow in their < 100 > directions and are formed by oriented attachment of isotropic Al NCs on their {100} facets. Branched NWs are strongly absorptive from the UV to the mid-IR, with longitudinal dipolar, higher-order, and transverse plasmons, all contributing to their broadband response. This rapid Al NW synthesis enables the expanded use of Al for plasmonic and nanophotonic applications in the ultraviolet, visible, and infrared regions of the spectrum.
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