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Aluminum Nanocubes Have Sharp Corners.

Benjamin D Clark, Christian R Jacobson, Minhan Lou

  • 1Division of Hematology, Department of Internal Medicine , The University of Texas McGovern Medical School , 6431 Fannin St , Houston , Texas 77030 , United States.

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|August 10, 2019
PubMed
Summary
This summary is machine-generated.

Synthesized single-crystalline aluminum (Al) nanocubes offer a stable, earth-abundant alternative for plasmonics. These Al nanocubes exhibit strong field enhancements, making them suitable for advanced nanophotonic applications.

Keywords:
field-enhancementnanotechnologyplasmonicsshape control{100} faceted

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Physical Chemistry

Background:

  • Nanocubes are of significant interest in plasmonics due to their unique optical properties.
  • Local electromagnetic field enhancement is crucial for many plasmonic phenomena.

Purpose of the Study:

  • To report a straightforward colloidal synthesis of single-crystalline aluminum (Al) nanocubes.
  • To explore the potential of Al nanocubes as an earth-abundant alternative to noble metal nanocubes in plasmonics and nanophotonics.

Main Methods:

  • Colloidal synthesis of Al nanocubes via decomposition of AlH3 with Tebbe's reagent in tetrahydrofuran.
  • Kinetic control over nanocube size and shape using reaction time, reagent ratio, and temperature.

Main Results:

  • Successfully synthesized single-crystalline {100} terminated Al nanocubes.
  • Demonstrated control over Al nanocube dimensions through reaction parameters.
  • Observed strong localized field enhancements at nanocube corners and tunable resonances.
  • Highlighted the air stability of Al nanocubes due to their native oxide layer.

Conclusions:

  • Chemically synthesized Al nanocubes are a viable, earth-abundant alternative to noble metal nanocubes for plasmonic applications.
  • The unique properties of Al nanocubes, including field enhancement and substrate coupling, are promising for nanophotonics.
  • The air stability of Al nanocubes simplifies their handling and integration into devices.