Aluminum Nanocrystals Grow into Distinct Branched Aluminum Nanowire Morphologies

Autor:	Peter Nordlander, Benjamin D. Clark, Naomi J. Halas, Minhan Lou
Rok vydání:	2020
Předmět:	Materials science Mechanical Engineering Nanowire Nanophotonics chemistry.chemical_element Bioengineering Nanotechnology General Chemistry Condensed Matter Physics Nanocrystal chemistry Aluminium General Materials Science Self-assembly Plasmon
Zdroj:	Nano Letters. 20:6644-6650
ISSN:	1530-6992 1530-6984
DOI:	10.1021/acs.nanolett.0c02466
Popis:	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 Tebbe's reagent, a titanium(III) catalyst with two cyclopentadienyl ligands. The ratio of TIBA to Tebbe's 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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::246784a3ce7872c6b2e5961fd72c9714 https://doi.org/10.1021/acs.nanolett.0c02466 Zobrazit plný text záznamu