Affiliation:
1. The Institute of Chemistry and the Center for Nanoscience & Nanotechnology The Hebrew University of Jerusalem Edmond J. Safra Campus Jerusalem 9190401 Israel
2. The Center for Nanoscience & Nanotechnology The Hebrew University of Jerusalem Edmond J. Safra Campus Jerusalem 9190401 Israel
Abstract
AbstractAluminum nanocrystals are emerging as a promising alternative to silver and gold for various applications ranging from plasmonic functionalities to photocatalysis and as energetic materials. Such nanocrystals often exhibit an inherent surface oxidation layer, as aluminum is highly reactive. Its controlled removal is challenging but required, as it can hinder the properties of the encaged metal. Herein, two wet‐chemical colloidal approaches toward the surface coating of Al nanocrystals, which afford control over the surface chemistry of the nanocrystals and the oxide thickness, are presented. The first approach utilizes oleic acid as a surface ligand by its addition toward the end of the Al nanocrystals synthesis, and the second approach is the post‐synthesis treatment of Al nanocrystals with NOBF4, in a “wet” colloidal‐based approach, which is found to etch and fluorinate the surface oxides. As surface chemistry is an important handle for controlling materials’ properties, this research paves a path for manipulating Al nanocrystals while promoting their utilization in diverse applications.
Subject
Biomaterials,Biotechnology,General Materials Science,General Chemistry
Cited by
2 articles.
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