Colloidal Synthesis of Crystalline Aluminum Nanoparticles for UV Plasmonics

Marion Castilla, Silvère Schuermans, Davy Gérard, Jérôme Martin, Thomas Maurer, Uri Hananel, Gil Markovich, Jérôme Plain, Julien Proust

Research output: Contribution to journalArticlepeer-review

Abstract

Numerous applications of nanotechnologies rely on the wide availability of high-quality crystalline nanoparticles (NPs). Although the chemical synthesis of noble metal nanoparticles (gold and silver) is well mastered, pushing the optical response of metallic nanoparticles toward the ultraviolet requires other materials, such as aluminum. Although a few demonstrations of the chemical synthesis of Al nanoparticles have been reported so far, an elaboration path allowing for a wide range of NP size that is compatible with mass production has yet to be demonstrated. In this Article, we report on the production of spherical, size-controlled crystalline Al NPs starting from commercial Al foils and without the use of a catalyst. The proposed method combines sonochemistry with solvochemistry and is fully up-scalable. The obtained NPs have a 10-100 nm crystalline Al core surrounded by a thin alumina shell, allowing long-term stability in ethanol. Well-defined plasmonic resonances in the UV and visible ranges are experimentally evidenced on single nanoparticles.

Original languageEnglish
Pages (from-to)880-887
Number of pages8
JournalACS Photonics
Volume9
Issue number3
DOIs
StatePublished - 16 Mar 2022

Keywords

  • aluminum
  • nanoparticles
  • plasmonics

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