Tuning the reactivity of energetic nanoparticles by creation of a core-shell nanostructure

A. Prakash, A. V. McCormick, M. R. Zachariah

Research output: Contribution to journalArticlepeer-review

102 Scopus citations

Abstract

This article presents a novel method for tuning the reactivity of nanoenergetic materials by coating a strong oxidizer nanoparticle (potassium permanganate; ∼150 nm) with a layer of a relatively mild oxidizer (iron oxide). The measured reactivity for a nano-Al/composite oxidizer could be varied by more than a factor of 10, as measured by the pressurization rate in a closed vessel (psJ/μs), by changing the coating thickness of the iron oxide. The composite oxidizer nanoparticles were synthesized by a new aerosol approach in which the nonwetting interaction between iron oxide and molten potassium permanganate aids the phase segregation of a nanocomposite droplet into a core-shell structure.

Original languageEnglish (US)
Pages (from-to)1357-1360
Number of pages4
JournalNano letters
Volume5
Issue number7
DOIs
StatePublished - Jul 1 2005

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