Size-dependent nanoparticle reaction enthalpy: Oxidation of aluminum nanoparticles

Autor:	Stephen W. Chung, Steven W. Buckner, Elena A. Guliants, Paul A. Jelliss, Christopher E. Bunker
Rok vydání:	2011
Předmět:	Lattice energy Materials science Economies of agglomeration Enthalpy Oxide Nanoparticle chemistry.chemical_element Nanotechnology General Chemistry Condensed Matter Physics chemistry.chemical_compound Chemical engineering chemistry Aluminium Particle General Materials Science Particle size
Zdroj:	Journal of Physics and Chemistry of Solids. 72:719-724
ISSN:	0022-3697
DOI:	10.1016/j.jpcs.2011.02.021
Popis:	Here we present a model describing the particle size dependence of the oxidation enthalpy of aluminum nanoparticles. The model includes the size dependence of the cohesive energy of the reactant particles, the size dependence of the product lattice energy, extent of product agglomeration, and surface capping effects. The strongest effects on aluminum nanoparticle energy release occur for particle diameters below 10 nm, with enhanced energy release for agglomerated oxide products and decreased energy release for nanoscale oxide products. An unusual effect is observed with all nanoparticle reaction enthalpies converging to the bulk value when agglomeration of the products approaches the transition between nanoparticle→nanoparticle and nanoparticle→bulk energetics. Optimal energy output for Al NP oxidation should occur for sub-10-nm particles reacting with significant agglomeration.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::a337b08adf851b84eb44a7dfcf249483 https://doi.org/10.1016/j.jpcs.2011.02.021 Zobrazit plný text záznamu Full Text from ScienceDirect