Multispectroscopic (FTIR, XPS, and TOFMS-TPD) Investigation of the Core-Shell Bonding in Sonochemically Prepared Aluminum Nanoparticles Capped with Oleic Acid (Postprint)
AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH MATERIALS AND MANUFACTURING DIRECTORATE
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Organically capped metal nanoparticles are an attractive alternative to more conventional oxide-passivated materials, due to the lower reaction temperatures and the possibility of tuning the organic coating. Sonochemical methods have been used to produce small 5 nm average size air-stable aluminum nanoparticles capped with oleic acid. In order to understand the nature of the metal-organic bonding in the nanoparticles, we have used FTIR, XPS, and TOFMS-TPD techniques to study the organic passivation layer and its desorption at elevated temperatures. In the present case we find that the organic layer appears to be attached via Al-O-C bonds with the C atom formerly involved in the carboxylic acid functional group.
- Coatings, Colorants and Finishes
- Metallurgy and Metallography
- Atomic and Molecular Physics and Spectroscopy