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Aluminum Nanoparticle Synthesis by Reduction of Halides with Na/K

Published online by Cambridge University Press:  01 February 2011

Andrew P Purdy ,
Joel B Miller ,
Rhonda M Stroud  and
Katherine A Pettigrew
Andrew P Purdy
Affiliation:
[email protected], Naval Research Laboratory, Chemistry Division, Code 6123, 4555 Ov erlook Av, SE, Washington, DC, 20375, United States
Joel B Miller
Affiliation:
[email protected], Naval Research Laboratory, Chemistry Division, Code 6123, 4555 Overlook Av, SE, Washington, DC, 20375, United States
Rhonda M Stroud
Affiliation:
[email protected], Naval Research Laboratory, Chemistry Division, Code 6123, 4555 Overlook Av, SE, Washington, DC, 20375, United States
Katherine A Pettigrew
Affiliation:
[email protected], Naval Research Laboratory, Chemistry Division, Code 6123, 4555 Overlook Av, SE, Washington, DC, 20375, United States
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Abstract

Solutions or mixtures of aluminum halides AlX3 (X = Cl, Br, I) or aluminum halide alkoxide (ROAlX2; R= i-Pr, X = Cl, Br) are prepared in toluene, or pentamethyldiethylenetriamine (PMDETA) and treated with a slight excess of 50:50 (wt.) sodium potassium alloy (Na/K). Upon agitation, the reaction takes place slowly. The reaction appears to be limited by the deposition of insoluble products on the surface of the Na/K since sonication in an ordinary ultrasonic cleaner is necessary to bring the reaction to completion in several hours. Aluminum nanoparticles (NPs) and Na and K halides are formed, and soluble Al compounds, are also formed in some cases. Lithium powder is used instead of Na/K to reduce Al(N(SiMe3)2)3 to Al NPs. In an effort to passivate the surface of the Al particles to oxidation or hydrolysis, various agents are added either during the reaction or afterward. The products are characterized by SEM, XRD, NMR, and TEM, and the stability to water and air is evaluated.

Keywords

Alchemical synthesisnanoscale
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1056: Symposium HH – Nanophase and Nanocomposite Materials V , 2007 , 1056-HH03-18
Copyright
Copyright © Materials Research Society 2008

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References

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