Chemical Dynamics of Aluminum Nanoparticles in Ammonium Nitrate and Ammonium Perchlorate Matrices: Enhanced Reactivity of Organically Capped Aluminum

Autor:	Thomas M. Sexton, Barbara A. Harruff, Andrew T. Rosenberger, William K. Lewis, Christopher E. Bunker, Elena A. Guliants, Joseph R. Gord
Rok vydání:	2010
Předmět:	Passivation Ammonium nitrate Inorganic chemistry Oxide Nanoparticle Ammonium perchlorate Chemical reaction Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry.chemical_compound General Energy chemistry Particle Reactivity (chemistry) Physical and Theoretical Chemistry
Zdroj:	The Journal of Physical Chemistry C. 115:70-77
ISSN:	1932-7455 1932-7447
DOI:	10.1021/jp107264h
Popis:	Aluminum nanoparticles have been a subject of active investigation in recent years because of their potential to enhance the energy content of energetic materials. The associated kinetics of the chemical reaction and energy release are, in many cases, governed by the properties of the passivation layer protecting the particle rather than those of the underlying metal core. The passivation layer of Al particles is typically an oxide shell several nanometers thick, but other possibilities are now available. We have previously developed synthesis routes to produce air-stable Al nanoparticles that are capped by oleic acid. In the present study, we examine the chemical dynamics of these materials in ammonium nitrate and ammonium perchlorate matrices. For comparison, the analogous experiments were also performed on samples using traditional oxide-protected particles. Reactions are initiated by a 20 μs IR laser pulse and then probed via time-of-flight mass spectrometry of the evolved gases and by emission spectr...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::7ede8b1122c85808acc8e9d907070665 https://doi.org/10.1021/jp107264h Zobrazit plný text záznamu