Title

Capping and Passivation of Aluminum Nanoparticles Using Alkyl-Substituted Epoxides

Document Type

Article

Publication Date

2009

Publication Source

Langmuir

Abstract

We report here on the synthesis and passivation of small (20−30 nm) aluminum nanoparticles using alkyl-substituted epoxides as capping agents. FTIR and 13C NMR spectroscopy indicate that the epoxides polymerize to form a polyether cap on the surfaces of the aluminum nanoparticles. Nanoparticles capped with epoxyhexane and epoxydodecane are stable in air, but particles capped with epoxyisobutane are pyrophoric. TEM images show spherical Al particles. Powder X-ray diffraction shows the presence of crystalline Al. Titrimetric analysis of the core−shell nanostructures in air reveals that 96% of the total aluminum present is active (unoxidized) aluminum.

Inclusive pages

8883–8887

ISBN/ISSN

0743-7463

Comments

Permission documentation is on file.

Publisher

American Chemical Society

Volume

25

Issue

16

Peer Reviewed

yes