Capping and Passivation of Aluminum Nanoparticles Using Alkyl-Substituted Epoxides
Langmuir2009Vol. 25(16), pp. 8883–8887
Citations Over TimeTop 14% of 2009 papers
Stephen W. Chung, Elena A. Guliants, Christopher E. Bunker, Douglas W. Hammerstroem, Yong Deng, Mark A. Burgers, Paul A. Jelliss, Steven W. Buckner
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.
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