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Surface Passivated Air and Moisture Stable Mixed Zirconium Aluminum Metal-Hydride Nanoparticles

Published online by Cambridge University Press:  01 February 2011

Albert Epshteyn ,
Joel B. Miller ,
Katherine A. Pettigrew ,
Rhonda M. Stroud  and
Andrew P. Purdy
Albert Epshteyn
Affiliation:
albert.epshteyn@nrl.navy.mil, Naval Research Laboratory, Chemistry Division,, 4555 Overlook Ave., SW, Washington, DC, 20375, United States
Joel B. Miller
Affiliation:
joel.b.miller@nrl.navy.mil, Naval Research Laboratory, Chemistry Division,, 4555 Overlook Ave., SW, Washington, DC, 20375, United States
Katherine A. Pettigrew
Affiliation:
katherine.pettigrew@nrl.navy.mil, Naval Research Laboratory, Chemistry Division,, 4555 Overlook Ave., SW, Washington, DC, 20375, United States
Rhonda M. Stroud
Affiliation:
rhonda.stroud@nrl.navy.mil, Naval Research Laboratory, Chemistry Division,, 4555 Overlook Ave., SW, Washington, DC, 20375, United States
Andrew P. Purdy
Affiliation:
andrew.purdy@nrl.navy.mil, Naval Research Laboratory, Chemistry Division,, 4555 Overlook Ave., SW, Washington, DC, 20375, United States
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Abstract

Synthesis of surface passivated Zr-Al mixed metal-hydride nanoparticles was accomplished via a multi-step process. The initial reaction to produce the zirconium aluminum hydride was via decomposition of zirconium tetrahydroaluminate (Zr(AlH4)4) while exposed to ultrasound produced by a benchtop ultrasonic bath. The particles were surface passivated using carbohydrates and were shown to be stable in air and partially stable in water. TEM imaging suggests the existence of smaller particles made of a Zr-Al alloy that range in size from 1.8 nm to 7.9 nm in diameter and are interspersed with larger particles that range from tens to hundreds of nanometers in diameter. It was also shown that the carbohydrate-derived coating of the nanoparticles is present as an aluminum alkoxide gel surrounding the core particles.

Keywords

passivationZrAl
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1056: Symposium HH – Nanophase and Nanocomposite Materials V , 2007 , 1056-HH03-16
Copyright
Copyright © Materials Research Society 2008

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References

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